PLC s7 200 Thông số kỹ thuật và cách đấu dây

General
2
CPUs
5
Digital expansion modules
19
Analog expansion modules
24
Communication modules
32
Power supplies
35
Human Machine Interface
36
SIMATIC Industrial Software
40
Configuring forms
46
Summary of ordering data
52
Appendix
56
s
The products and systems
described in this catalog are sold
under application of a quality
management system certified
by DQS in accordance with
DIN EN ISO 9001 (Certificate
registration No.: 1323-03).
The DQS Certificate is re-

cognized in all EQ Net countries
(Reg. No.: 1323).
SIMATIC
Micro PLC
SIMATIC S7-200
Extract from Catalog ST 70
Edition September 2000
Supersedes:
Extract SIMATIC S7-200 from Catalog ST 70,
Edition August 1999
For further information
contact your local
Siemens representative
The products listed in this catalog
are also available from
the CD-ROM Catalog CA 01.
Order No.:
E86060-D4001-A100-B4-7600
Page
2
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
General
SIMATIC S7-200
■
Overview
•The micro PLC that offers
maximum automation at
minimum cost

•Highly integrated, space-
saving, powerful
•Can be used both for simple
controls and for complex
automation tasks
•In stand-alone mode, in
networks and within
distributed structures
•Suitable for applications
where programmable
controllers would not have
been viable in the past
•W ith outstanding real-time
performance and powerful
communication (PPI,
PROFIBUS-DP, AS-
Interface)
•Extremely simple
installation, programming
and operation
■
Application The SIMATIC
®
S7-200
®
is a
micro PLC for open-loop and
closed-loop control tasks in
mechanical engineering and
plant engineering. It

combines maximum
automation with minimum
cost.
SIMATIC S7-200 applications
range from replacing relays
and contactors to handling
complex automation tasks in
stand-alone mode, in
networks and within
distributed configurations.
To save costs, the S7-200 is
increasingly being employed
in areas that previously
required special electronics.
Applications include:
•Baling presses
•Plaster and cement mixers
•Ventilation plants
•Centralized/flange lubri-
cating systems
•W oodworking machinery
•Gate controls
•Hydraulic lifts
•Conveyor systems
•Food and beverage industry
•Laboratories
•Modem applications
(remote monitoring)
•Electrical installations
The S7-200 features:

•Easy to learn, with special
starter packages and
manuals
•Uncomplicated operation;
powerful, easy-to-use
standard instructions and
user-friendly programming
software reduce
programming to a minimum
•Unequaled real-time
features; interrupt functions,
high-speed counters and
pulse outputs permit
application in time-critical
processes
•Powerful communication
capabilities; the integrated
PROFIBUS-DP interface in
particular enables the S7-
200 to maximize its
performance in distributed
automation solutions.
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
3
SIMATIC S7-200
General
■
Design The SIMATIC S7-200 family
consists of the following

modules:
•4 different basic units in
different variants
•14 digital and analog
expansion modules
•2 communications modules
for connecting to PROFIBUS
and AS-Interface
Mechanical features
•Rugged, compact plastic
housing
•Easily accessible wiring and
operator control elements
protected by front covers
Design features
•International standards; the
SIMATIC S7-200 meets the
requirements through
compliance with VDE, UL,
CSA and FM (Class I,
Division 2, hazardous area
groups A, B, C and D, T4A)
standards. The quality
management system used
during manufacturing has
ISO 9001 certification.
■
Communication The SIMATIC S7-200 offers
various communication
capabilities:

•Point-to-point interface; can
be operated in PPI, MPI
(slave) mode and in user-
programmable interface
mode
•AS-Interface connection; as
master via the CP 243-2
communication processor
•Connection to PROFIBUS-
DP as slave; via the
PROFIBUS-DP module
EM 277
PPI network
PPI is the communications
system integrated in every S7-
200 CPU. Connections for pro-
gramming or for human machi-
ne interface functionality can
be established over a shared
twisted-pair cable. The CPUs
can communicate with several
other CPUs, TDs or OPs
simultaneously
The data transfer rate is 9.6/
19.2/187.5 kbit/s. The
following can be connected:
•PG 720PII, PG 740PIII,
PC RI45 PIII Tower
programming devices
•PCs (AT-compatible), via PC/

PPI cable
•TD 200 text display; SIMATIC
OP operator panels
•SIMATIC S7-200; up to 31
S7-200s can be operated on
a shared data bus with a
programming device, PC, TD
200 or OP. Direct data ex-
change between S7-200
controllers (in each case as a
master) with the NETR and
NETW commands.
MPI network
All CPUs can be connected to
an MPI network (19.2/187.5
kbit/s) via the integrated
interface and can then
communicate with SIMATIC
S7-300
®
s/S7-400
®
s. The S7-
200 CPUs are slaves in the
MPI-network and cannot
communicate with each other.
Fig. 1 Communication in PPI mode
Fig. 2 Communication in PPI mode
Programming device/PC
PC via PC/PPI cable

or MPI card
S7-200
S7-200
S7-200
SIMATIC OP
TD 200
PPI network
SIMATIC OP
S7-400
S7-300
S7-200
MPI network
Progr. device/PC
PC via MPI card
4
SIMATIC S7-200
General
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
■
Communication (cont.) Point-to-point interface,
user-programmable
interface mode
Connection to the RS 232
interface via PC/PPI cable.
Data transmission is
performed with the CPU in
FreePort mode; in the case of
the CPU 226, both ports can
be operated in FreePort

mode. Data exchange takes
place using a user-specific,
bit-oriented communications
protocol (e.g. ASCII protocol
or Modbus). Maximum data
transmission rate 38.4 kbit/s
(adjustable).
Point-to-point connections are
possible to the following units:
• Any data terminal equipment
which has a serial interface,
e.g. printers, bar-code
readers
•S7-200 micro PLC; e.g. for
simple data exchange
between two CPUs
AS-Interface
The SIMATIC S7-200 is
connected to the AS-Interface
as a master via the CP 243-2.
This increases the number of
inputs and outputs appre-
ciably:
•Up to 31 AS-Interface slaves
with up to 248 binary
elements
PROFIBUS-DP slave
PROFIBUS-DP guarantees
integrated and uniform
communication between all

SIMATIC system components
while at the same time
maintaining an open system.
PROFIBUS-DP’s high data
transfer rate (up to 12 Mbit/s)
over the integrated interface
allows the real time features of
the S7-200 to be used to their
full extend within a distributed
system structure.
Response times in the millise-
cond range enable applica-
tions such as the following:
•Motor synchronization
•Interrupt-oriented applica-
tions
•Coordination of high-speed
counting processes
Fig. 3 Communication in user-programmable interface mode
Fig. 4 Communication via AS-Interface
Fig. 5 Communication via PROFIBUS-DP
S7-200
SONAR BERO
with int. AS-Interface
Inductive BERO
with int. AS-Interface
Operator panel
SIMATIC S7-300
0
1

ET 200
S7-200
SIMATIC S7-400
SIMATIC OP
SIMATIC C7
Programming device
SIMATIC S5
Printer
Barcode reader
S7-200
S7-200
Modem
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
5
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226
■
Overview
CPU 221
•The smart compact solution
•W ith 10 inputs/outputs on
board
•Not expandable
■
CPU 222 •The top compact solution
•W ith 14 inputs/outputs
on board
•Expandable with max. 2

expansion boards
■
CPU 224 •The compact high-perfor-
mance CPU
•W ith 24 inputs/outputs
on board
•Expandable with max. 7
expansion boards
■
CPU 226 •The powerful package for
large technical tasks
•W ith an additional communi-
cation interface for even
more flexibility and commu-
nication options
•W ith 40 inputs/outputs
on board
•Expandable with max. 7
expansion modules
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
6
SIMATIC S7-200
CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■
Application CPU 221
The smart compact solution,
with 10 inputs/outputs on
board, cannot be extended.

CPU 222
The superior compact
solution with 14 inputs/outputs
on board, expandable with
max. 2 expansion boards.
CPU 224
The compact high-perfor-
mance CPU, with 24 inputs/
outputs on board, expandable
with max. 7 expansion
boards.
CPU 226
The power pack for complex
technical tasks. W ith
additional communication
interface for added flexibility
and communication options.
W ith 40 inputs/outputs on
board, expandable with max.
7 expansion boards.
■
Design The CPUs include:
•Integrated 24 V sensor/load
power supply; for the direct
connection of sensors and
encoders. W ith 180 mA
(CPU 221/222), 280 mA
(CPU 224), 400 mA
(CPU 226) it can also be
used as a load power supply

•2 device variants;
with different supply and
control voltages
•Integrated digital inputs/
outputs;
CPU 221:
6 inputs and 4 outputs;
CPU 222:
8 inputs and 6 outputs;
CPU 224:
14 inputs and 10 outputs;
CPU 226:
24 inputs and 16 outputs
•CPU 221/222/224:
1 communication interface;
CPU 226:
2 communication interfaces;
optionally
- as PPI interface with PPI
protocol for programming
functions, HMI
®
functions
(TD 200, OP), S7-200-
internal CPU/CPU
communication (9.6/19.2/
187.5 kbit/s) or as MPI
slave for data exchange
with MPI masters (S7-300/-
400, OPs, TDs, Push

Button Panels)
- user-programmable
interface (FreePort) with
interrupt capability for
serial data exchange with
non-Siemens devices, e.g.
at the ASCII protocol baud
rates 0.3/0.6/1.2/2.4/4.8/
9.6/19.2/38.4 kbit/s;
PC/PPI cable can be used
as RS 232/RS 485 adapter
•CPU 222/224/226:
Expansion bus; connection
of expansion modules (only
EMs of the 22x series can be
used)
•Interrupt inputs; for
extremely fast responses to
rising or falling edges of
process signals
•High-speed counters;
CPU 221/222:
4 high-speed counters
(30 kHz);
CPU 224/226:
6 high-speed counters
(30 kHz), with parameteriza-
ble enable and reset inputs
that can be used
simultaneously as up and

down counters with two
separate inputs and for
connecting incremental
encoders wtih two pulse
sequences (20 kHz) with a
90° offset
•CPU 222/224/226:
Trouble-free expandability
through digital and analog
expansion modules (EM’s)
•Simulator (optional);
for the simulation of
integrated inputs and the
testing of user programs
•Analog potentiometers;
CPU 221/222:
1 analog potentiometers;
CPU 224/226:
2 analog potentiometers,
can be used as a user-
friendly setpoint adjuster
during everyday operation,
such as for setting timers
•Pulse outputs;
2 high-frequency pulse
outputs (max. 20 kHz); For
use in positioning tasks and
the control of frequency-
regulated motors and
stepper motors via power

circuits
•Real-time clock
(for insertion as optional
module CPU 221/222);
for example for adding time
stamps to messages, for
registering machine running
times or for the time-control
of processes
•EEPROM cartridge (can
optionally be inserted);
allows rapid program
change (even without a
programming device) and
additional program
archiving
• Battery module for long-term
buffering; for extending the
buffering time to typically
200 days. W ithout the
battery module, user data
(e.g. memory bit statuses,
data blocks, timers,
counters) are saved by an
internal high-power
capacitor for around 5 days.
The program is always
saved in non-volatile
memory (maintenance-free).
The battery module is

inserted into the memory
submodule slot.
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
7
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226
■
Design (cont.)
Device versions
■
Functions •Extensive set of instructions;
A multiplicity of
- basic operations such as
binary logic operations,
result allocation, save,
count, create times, load,
transfer, compare, shift,
rotate, create complement,
call sub-program (with
local variables)
- integrated communication
commands (eg. S7-200
communication (Network
read NETR, Network write
NETW ) or Freeport
(Transmit XMT, Receive
RCV)) and
- enhanced functions such

as pulse-duration
modulation, pulse
sequence function, arith-
metic functions, floating
point arithmetic, PID
closed-loop control, jump
functions, loop functions
and code conversions
simplify the programming
task
•Counting;
user-friendly counting
functions in conjunction with
the integrated counters und
special commands for the
High Speed Counter open
up new application areas for
the user
•Interrupt handling;
- Edge-triggered interrupts
(triggered by either rising
or falling edges of process
signals at interrupt inputs)
permit extremely fast
reactions to process inter-
rupts
- Time-controlled interrupts
can be set in at 1 ms incre-
ments from 5 ms to 255 ms
- Counter interrupts can be

triggered when a specified
value is reached or if the
counter direction changes
- Communication interrupts
allow the rapid and easy
exchange of information
with peripheral devices
such as printers or bar
code readers
•Direct interrogation and
control of inputs/outputs;
Inputs and outputs can also
be interrogated and set
independently of the cycle.
The controller can so react
quickly to process events
(e.g. direct resetting of
outputs when interrupt
occurs)
•Password protection; the
3-level password protection
concept safeguards effec-
tively your know-how. The
protection concept has the
following options for access
to the user program:
- Full access: The program
can be altered as desired.
- Read only: The program is
protected against unautho-

rized alteration. Testing,
adjustment of system
parameters and copying of
the program is allowed.
- Complete protection: The
program is protected
against alteration and un-
authorized readout and
copying. Adjustment of pa-
rameters is allowed.
•Test and diagnostic
functions;
User-friendly functions
support testing and
diagnostics: the complete
program is run over a prede-
termined number of cycles
and analyzed. Internal
parameters such as memory
bits, timers or counters are
logged at the same time
over a maximum of 124
cycles.
•”Forcing” of inputs and
outputs during test and
diagnostic operation;
Inputs and outputs can be
set independently of cycle
and thus permanently, for
example to test the user

program.
•Runtime edit:
•During RUN mode,
programs can be edited and
modified programs can be
loaded into the CPU with a
mouse click without having
to interrupt the running
program
•Additional mathematical
functions, e.g. SIN, COS,
TAN, LN, EXP
CPU 224, CPU 226 in addi-
tion:
•Runtime edit:
During RUN mode, pro-
grams can be edited and
modified programs can be
loaded into the CPU with a
mouse click without having
to interrupt the running pro-
gram
•Additional mathematical
functions, e.g. SIN, COS,
TAN, LN, EXP
■
Programming The STEP
®
7-Micro/W IN32 V3
programming package

permits complete
programming of all S7-200-
CPUs
Note
The CPU 22x cannot be
programmed using STEP 7-
Micro/DOS.
For programming via the seri-
al interface of the program-
ming device/PC, a PC/PPI
cable is required.
W hen using the STEP 7-Micro/
W in32 V3 programming soft-
ware, programming is also
possible via the SIMATIC CPs
CP 5511 or CP 5611 (see
Catalog IK PI) or the MPI
interface of the programming
device. This increases the
maximum permissible
transmission rate to
187.5 kbit/s.
Version Supply voltage Input voltage Output voltage Output current
CPU 221/222/224/226 DC outputs 24 V DC 24 V DC 24 V DC 0.75 A,
transistor
Relay outputs 85 to 264 V AC 24 V DC 24 V DC ,
24 to 230 V AC
2 A, relay
8
Micro PLC SIMATIC S7-200

September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■
Technical specifications CPU 221
Program memory 4 kbytes
Data memory 2 kbytes
Memory cartridge (optional) 1 pluggable memory cartridge;
content identical to the inte-
grated EEPROM
Program backup entire program maintenance-free
in the integrated EEPROM
Data backup • entire DB 1 loaded from pro-
gramming device/PC into inte-
gral EEPROM; maintenance-free
• current DB 1 values in RAM, re-
tentive memory bits, timers,
counters etc. maintenance-free
through super capacitor;
optional battery for long-term
backup.
Backup time typ. 50 h (min. 8 h at 40 °C);
200 days (typ.) with optional bat-
tery module
Programming language LAD, FBD and STL
Program organization 1 OB, 1 DB, 1 SDB
Subroutines with/without parame-
ter passing
Program execution • free cycle (OB 1)

• interrupt-controlled
• time controlled (1 to 255 ms)
Subroutine levels 8
User program protection 3-stage password protection
Operation set Bit logic operations, comparison
operations, timer operations,
counting operations, clock opera-
tions, fixed-point arithmetic, float-
ing-point arithmetic, numerical
functions, move operations, table
operations, logic operations, shift
and rotate operations, conver-
sion operations, program control
operations, interrupt and commu-
nication operations, stack opera-
tions
Execution times for bit operations 0.37 µs
Cycle time monitoring 300 ms (retriggerable)
Bit memories 256
• of these retentive 0 to 112 in EEPROM, selectable;
0 to 256, via super capacitor or
battery, selectable
Counter 256
• of these retentive 256, via super capacitor or
battery, selectable
• Counting range 0 to 32767
Timers 256
• of these retentive 64, via super capacitor or battery,
selectable
• range 4 timers, 1 ms to 30 s

16 timers, 10 ms to 5 min
236 timers, 100 ms to 54 min
Integrated high speed functions
• Interrupt inputs 4 (4 rising edges and/or 4 falling
edges)
• Counters 4 fast counters (each with
30 kHz), 32 bits (incl. sign),
can be used as up/down
counters or for connecting 2
incremental encoders with pulse
trains offset by 90°;
(max. 20 kHz (A/B counter));
with parameterizable enable and
reset inputs;
Interrupt options (inc. calling a
subroutine with any content) on
reaching a specified value;
reversal of counting direction etc.
• Pulse outputs 2 high-speed outputs, 20 kHz,
with interrupt option; pulse width
and frequency modulation possi-
ble
Interfaces 1 RS 485 communication
interface, optionally:
• as PPI interface with PPI
protocol for programming
functions, HMI functions
(TD 200, OP), S7-200-internal
CPU/CPU communication; Baud
rates 9.6/19.2/187.5 kbit/s

• or as MPI slave for data
exchange with MPI masters (S7-
300/S7-400 CPU’s, OP’s, TDs,
push-button panels); S7-200-
internal CPU/CPU
communication is not possible in
the MPI network; transmission
rates 19.2/187.5 kbit/s
• or as user-programmable
interface with interrupt capability
for serial data exchange with
non-Siemens devices, e.g. at
ASCII protocol baud rates:
0.3/0.6/1.2/2.4/4.8/9.6/19.2/
38.4 kbit/s;
at 1.2 to 38.4 kbit/s the PC/PPI
cable can be used as an RS232/
RS458 adapter
Connectable programming units/PC PG 720 PII, PG 740 PIII,
PC RI 45 PIII Tower, standard PCs
Integrated inputs/outputs
• Plug-in I/O terminals No
• Digital inputs 6
• Digital outputs 4
• Analog potentiometer 1 analog potentiometer;
8 bit resolution
Max. number of inputs/outputs
• Digital inputs/outputs max. 6 inputs and 4 outputs (inte-
grated inputs/outputs);
no extension possible

• Analog inputs/outputs -
• AS-Interface inputs/outputs, max. -
Expansion, max. -
Degree of protection IP 20 in accordance with IEC 529
Ambient temperature
• with horizontal installation 0 to 55 °C
• when mounted vertically 0 to 45 °C
Relative humidity 5 to 95% (RH severity level 2 in
accordance with IEC 1131-2)
Atmospheric pressure 860 to 1080 hPa
Other environmental conditions see “S7-200 Programmable
Controller, system manual”
9
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226
■
Technical specifications CPU 221 (cont.)
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:
24 V DC Relay
Supply voltage L+/L1
• rated value 24 V DC 100 to 230 V AC
• permitted range 20.4 to 28.8 V 85 to 264 V AC
(47 to 63 Hz)
Input current

• max. incl. load 10 A at 28.8 V 20 A at 264 V
• power consumption max. 80 to 900 mA 15 to 60 mA
(240 V)
30 to 120 mA
(12 V)
Output voltage for sensors
and transmitters
• rated value L+ (24 V DC) 24 V DC
• permitted range 15.4 to 28.8 V 20.4 to 28.8 V
Output current for sensors
(24 V DC)
• rated value 180 mA 180 mA
• short-circuit protection electronic at
600 mA
electronic at
600 mA
Output current for expansion
modules (5 V DC)

Integrated inputs 6 6
• Type optionally active
high and active
low per group
optionally active
high and active
low per group
Input voltage
• rated value 24 V DC 24 V DC
• for "1" signal, min. 15 V 15 V
• for "0" signal 0 to 5 V 0 to 5 V

Galvanic isolation Optocoupler Optocoupler
• in groups of 2 and 4 2 and 4
Input current
• rated value for "1" signal 4 mA 4 mA
Input delay (at rated value of
the input voltage)
• for standard inputs max. every
0.2 to 12.8 ms,
selectable
every
0.2 to 12.8 ms,
selectable
• for interrupt inputs (I0.0 to I0.3)
0.2 to 12.8 ms,
selectable
(I0.0 to I0.3)
0.2 to 12.8 ms,
selectable
• for fast counters max. (I0.0 to I0.5)
30 kHz
(I0.0 to I0.5)
30 kHz
Connection of 2-wire BERO
• Permissible quiescent cur-
rent, max.
1 mA 1 mA
Cable lengths
• unshielded (not for high-
speed signals)
300 m 300 m

• shielded
- standard input
- high-speed counters
500 m
50 m
500 m
50 m
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:
24 V DC Relay
Integrated outputs 4 (transistor)
switchable in
parallel for higher
output currents
4 (relay)
Rated load voltage L+/L1 24 V DC 24 V DC/ 24 to
230 V AC
• permitted range 20.4 to 28.8 V DC 5 to 30 V DC/
5 to 250 V AC
Output voltage
• for "1" signal, min. 20 V DC L+/L1
Galvanic isolation Optocoupler Relay
• in groups of 4 1 and 3
Output current max.
• for "1" signal
- rated value at 40 °C 0.75 A 2 A
- rated value at 55 °C 0.75 A 2 A
• min. current - -

• for "0" signal 0.1 mA 0 mA
Sum of all output currents
• at 40 °C, max. 3.0 A 6.0 A
• at 55 °C, max. (horizontal in-
stallation)
3.0 A 6.0 A
ON delay
• of the standard outputs,
max.
(O0.2 to O0.3)
15 µs
(all outputs)
10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
2 µs
-
OFF delay
• of the standard outputs, max. (O0.2 to O0.3)
100 µs
(all outputs)
10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
10 µs
-
Operating frequency of the
pulse outputs
(O0.0 to O0.1) (O0.0 to O0.1)
• for resistive load 20 kHz -
Switching capacity of the out-
puts

• for resistive load 0.75 A 2 A
• for a lamp load 5 W 30 W DC
200 W AC
Service life of the contacts
(number of switching cycles to
VDE 0660, Part 200)
• mechanical - 10 mill.
• at rated load - 100.000
Limitation of voltage induced
on circuit interruption, max.
1 W -
Short-circuit protection provide externally provide externally
Cable lengths
• unshielded 150 m 150 m
• shielded 500 m 500 m
Isolation
• between 24 V DC and 5 V DC 500 V DC 500 V DC
• betw. 24 V DC and 230 V AC - 1500 V AC
Dimensions (W x H x D)
in mm
90 x 80 x 62 90 x 80 x 62
W eight, approx. 270 g 310 g
10
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■
Technical specifications CPU 222

Program memory 4 kbytes
Data memory 2 kbytes
Memory cartridge (optional) 1 pluggable memory cartridge;
content identical to the inte-
grated EEPROM
Program backup Entire program maintenance-free
in the integrated EEPROM
Data backup • Entire DB 1 loaded from pro-
gramming device/PC into inte-
gral EEPROM; maintenance-free
• Current DB 1 values in RAM, re-
tentive flags, timers, counters
etc. maintenance-free through
super capacitor; optional battery
for long-term backup
Backup time typ. 50 h (min. 8 h at 40 °C);
200 days (typ.) with optional bat-
tery module
Programming language LAD, FBD and STL
Program organization 1 OB, 1 DB, 1 SDB
Subroutines with/without parame-
ter passing
Program execution • free cycle (OB 1)
• interrupt-controlled
• time controlled (1 to 255 ms)
Subroutine levels 8
User program protection 3-level password protection
Operation set Bit logic operations, comparison
operations, timer operations,
counting operations, clock opera-

tions, fixed-point arithmetic, float-
ing-point arithmetic, numerical
functions, move operations, table
operations, logic operations, shift
and rotate operations, conver-
sion operations, program control
operations, interrupt and commu-
nication operations, stack opera-
tions
Execution times for bit operations 0.37 µs
Cycle time monitoring 300 ms (retriggerable)
Bit memories 256
• of these retentive 0 to 112 in EEPROM, selectable;
0 to 256, via super capacitor or
battery, selectable
Counter 256
• of these retentive 256, via super capacitor or
battery, selectable
• counting range 0 to 32767
Timers 256
• of these retentive 64, via super capacitor or battery,
selectable
• range 4 timers, 1 ms to 30 s
16 timers, 10 ms to 5 min
236 timers, 100 ms to 54 min
Integrated high-speed functions
• Interrupt inputs 4 (4 rising edges and/or 4 falling
edges)
• Counters 4 fast counters (each with
30 kHz), 32 bits (incl. sign),

can be used as up/down
counters or for connecting 2
incremental encoders with pulse
trains offset by 90°;
(max. 20 kHz (A/B-Counter));
with parameterizable enable and
reset inputs;
Interrupt options (inc. calling a
subroutine with any content) on
reaching a specified value;
Reversal of counting direction
etc.
• Pulse outputs 2 high-speed outputs, 20 kHz,
with interrupt option; pulse width
and frequency modulation possi-
ble
Interfaces 1 RS 485 communication
interface, optionally:
• as PPI interface with PPI
protocol for programming
functions, HMI functions (TD
200, OP), S7-200-internal CPU/
CPU communication; Baud
rates 9.6/19.2/187.5 kbit/s
• or as MPI slave for data
exchange with MPI masters (S7-
300/S7-400 CPU’s, OP’s, TDs,
push-button panels); S7-200-
internal CPU/CPU
communication is not possible in

the MPI network; transmission
rates 19.2/187.5 kbit/s
• or as user-programmable
interface with interrupt capability
for serial data exchange with
non-Siemens devices, e.g. at
ASCII protocol baud rates:
0.3/0.6/1.2/2.4/4.8/9.6/19.2/
38.4 kbit/s;
at 1.2 to 38.4 kbit/s the PC/PPI
cable can be used as an RS232/
RS485 adapter
Expansion bus:
• Connection of expansion mod-
ules (EM)
1)
Connectable programming units/PC PG 720 PII, PG 740 PIII, PC
RI45 PIII Tower, standard PC
Integrated inputs/outputs
• Plug-in I/O terminals No
• Digital inputs 8
• Digital outputs 6
• Analog potentiometer 1 analog potentiometer;
8 bit resolution
Max. number of inputs/outputs
• Digital inputs/outputs max. 40 inputs and 38 outputs
(CPU + EM)
• Analog inputs/outputs max. 8 inputs and 2 outputs (EM)
or
max. 0 inputs and 4 outputs (EM)

• AS interface inputs/outputs, max. max. 31 AS-Interface slaves
(CP 243-2)
Expansion, max. 2 expansion modules
1)
Degree of protection IP 20 in accordance with IEC 529
Ambient temperature
• with horizontal installation 0 to 55 °C
• when mounted vertically 0 to 45 °C
1) Only S7-22x series expansion modules can be used. Because of the limited output current, the use of expansion boards can be subject to
restrictions.
11
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226
■
Technical specifications CPU 222 (cont.)
Relative humidity 5 to 95% (RH severity level 2 in accor-
dance with IEC 1131-2)
Atmospheric pressure 860 to 1080 hPa
Other environmental
conditions
see “S7-200 Programmable Controller,
system manual”
Power supply:
24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:

24 V DC Relay
Supply voltage L+/L1
• rated value 24 V DC 100 to 230 V AC
• permitted range 20.4 to 28.8 V 85 to 264 V AC
(47 to 63 Hz)
Input current - -
• Max. incl. load 10 A at 28.8 V 20 A at 264 V
• Power consumption max. 85 to 500 mA 20 to 70 mA
(24 V)
40 to 140 mA
(120 V)
Output voltage for sensors
and transmitters
• rated value L+ (24 V DC) 24 V DC
• permitted range 15.4 to 28.8 V 20.4 to 28.8 V
Output current for sensors
(24 V DC)
• rated value 180 mA 180 mA
• short-circuit protection electronic at
600 mA
electronic at
600 mA
Output current for expansion
modules (DC 5 V)
340 mA 340 mA
Integrated inputs 8 8
• Type optionally active
high and active
low per group
optionally active

high and active
low per group
Input voltage
• rated value 24 V DC 24 V DC
• for "1" signal 15 V 15 V
• for "0" signal 0 to 5 V 0 to 5 V
Galvanic isolation Optocoupler Optocoupler
• in groups of 4 4
Input current
• rated value for "1" signal 4 mA 4 mA
Input delay (at rated value of
the input voltage)
• for standard inputs every
0.2 to 12.8 ms
(selectable)
every
0.2 to 12.8 ms
(selectable)
• for interrupt inputs (I0.0 to I0.3)
0.2 to 12.8 ms
(selectable)
(I0.0 to I0.3)
0.2 to 12.8 ms
(selectable)
• for high-speed counters,
max.
(I0.0 to I0.5)
30 kHz
(I0.0 to I0.5)
30 kHz

Connection of 2-wire BERO
• Permissible quiescent
current, max.
1 mA 1 mA
Cable lengths
• unshielded (not for high-
speed signals)
300 m 300 m
• shielded
- standard input
- high-speed counters
500 m
50 m
500 m
50 m
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:
24 V DC Relay
Integrated outputs 6 (transistor)
switchable in
parallel for higher
output currents
6 (relay)
Rated load voltage L+/L1 24 V DC 24 V DC/ 24 to
230 V AC
• permitted range 20.4 to 28.8 V DC 5 to 30 V DC/
5 to 250 V AC
Output voltage

• for "1" signal, min. DC 20 V L+/L1
Galvanic isolation Optocoupler Relay
• in groups of 6 3
Output current max.
• for "1" signal
- rated value at 40 °C 0.75 A 2 A
- rated value at 55 °C 0.75 A 2 A
• min. current - -
• for "0" signal 10 µA0 mA
Sum of all output currents
(horizontal installation)
• at 40 °C, max. 4.5 A 6.0 A
• at 55 °C, max.
(horizontal installation)
4.5 A 6.0 A
ON delay
• of the standard outputs, max. (O0.2 to O0.5)
15 µs
(all outputs)
10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
2 µs
-
OFF delay
• of the standard outputs, max. (O0.2 to O0.5)
100 µs
(all outputs)
10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
10 µs

-
Operating frequency of the
pulse outputs
(O0.0 to O0.1) (O0.0 to O0.1)
• for resistive load 20 kHz -
Switching capacity of the
outputs
• for resistive load 0.75 A 2 A
• for a lamp load 5 W 30 W for DC
200 W for AC
Service life of the contacts
(number of switching cycles to
VDE 0660, Part 200)
• mechanical - 10 mill.
• at rated load - 100.000
Limitation of voltage induced
on circuit interruption, max.
1 W -
Short-circuit protection provide externally provide externally
Cable lengths
• unshielded 150 m 150 m
• shielded 500 m 500 m
Isolation
• between 24 V DC and 5 V DC 500 V DC 500 V DC
• betw. 24 V DC and 230 V AC - 1500 V AC
Dimensions (W x H x D)
in mm
90 x 80 x 62 90 x 80 x 62
W eight, approx. 270 g 310 g
12

Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■
Technical specifications CPU 224
Program memory 8 kbytes
Data memory 5 kbytes
Memory cartridge (optional) 1 pluggable memory cartridge; content
identical to the integrated EEPROM
Program backup Entire program maintenance-free in the
integrated EEPROM
Data backup • Entire DB 1 loaded from programming
device/PC into integral EEPROM;
maintenance-free
• Current DB 1 values in RAM, retentive
flags, timers, counters etc. mainte-
nance-free through super capacitor;
optional battery for long-term backup
Backup time 190 h (min.120 h at 40 °C);
200 days (typ.) with optional battery
module
Programming language LAD, FBD and STL
Program organization 1 OB, 1 DB, 1 SDB
Subroutines with/without parameter
passing
Program execution • free cycle (OB 1)
• interrupt-controlled
• time controlled (1 to 255 ms)

Subroutine levels 8
User program protection 3-level password protection
Operation set Bit logic operations, comparison opera-
tions, timer operations, counting opera-
tions, clock operations, fixed-point
arithmetic, floating-point arithmetic,
numerical functions, move operations,
table operations, logic operations, shift
and rotate operations, conversion oper-
ations, program control operations,
interrupt and communication opera-
tions, stack operations
Execution times for bit opera-
tions
0.37 µs
Cycle time monitoring 300 ms (retriggerable)
Bit memories 256
• of these retentive 0 to 112 in EEPROM, selectable;
0 to 256, via super capacitor or battery,
selectable
Counter 256
• of these retentive 256, via super capacitor or battery,
selectable
• counting range 0 to 32767
Timers 256
• of these retentive 64, via super capacitor or battery,
selectable
• range 4 timers, 1 ms to 30 s
16 timers, 10 ms to 5 min
236 timers, 100 ms to 54 min

Integrated high-speed
functions
• Interrupt inputs 4 (4 rising edges and/or
4 falling edges)
• Counter 6 fast counters (each with 30 kHz),
32 bits (incl. sign), can be used as up/
down counters or for connecting 2
incremental encoders with pulse trains
offset by 90°; (max. 20 kHz (A/B
counter)); with parameterizable enable
and reset inputs;
Interrupt options (inc. calling a
subroutine with any content) on
reaching a specified value;
Reversal of counting direction etc.
• Pulse outputs 2 high-speed outputs, 20 kHz, with
interrupt option; pulse width and fre-
quency modulation possible
Interfaces 1 RS 485 communication interface,
optionally:
• as PPI interface with PPI protocol for
programming functions, HMI
functions (TD 200, OP), S7-200-
internal CPU/CPU communication;
Baud rates 9.6/19.2/187.5 kbit/s
• or as MPI slave for data exchange
with MPI masters (S7-300/S7-400
CPU’s, OP’s, TDs, push-button
panels); S7-200-internal CPU/CPU
communication is not possible in the

MPI network;
transmission rates 19.2/187.5 kbit/s
• or as user-programmable interface
with interrupt capability for serial data
exchange with non-Siemens devices,
e.g. at ASCII protocol baud rates:
0.3/0.6/1.2/2.4/4.8/9.6/19.2/38,
4 kbit/s;
at 1.2 to 38.4 kbit/s the PC/PPI cable
can be used as an RS232/RS485
adapter
Expansion bus
• Connection of expansion modules
(EM)
1)
Connectable programming
units/PC
PG 720 PII, PG 740 PIII,
PC RI45 PIII Tower and Standard PC
Integrated inputs/outputs
• Plug-in I/O terminals Yes
• Digital inputs 14
• Digital outputs 10
• Analog potentiometer 2 analog potentiometer; 8 bit resolution
Max. number of inputs/outputs
• digital inputs/outputs 94 inputs and 74 outputs
• analog inputs/outputs 28 inputs and 7 outputs or
0 inputs and 14 outputs
• AS-Interface inputs/outputs,
max.

max. 31 AS-Interface slaves
(CP 243-2)
Expansion, max. 7 expansion modules
1)
Only expansion modules from the
S7-22x series may be used
Degree of protection IP 20 in accordance with IEC 529
Ambient temperature
• with horizontal installation 0 to 55 °C
• when mounted vertically 0 to 45 °C
Relative humidity 5 to 95% (RH severity level 2 in accor-
dance with IEC 1131-2)
Atmospheric pressure 860 to 1080 hPa
Other environmental condi-
tions
see “S7-200 Programmable
Controller, system manual”
1) Only S7-22x series expansion modules can be used. Because of the limited output current, the use of expansion boards can be subject to
restrictions.
13
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226
■
Technical specifications CPU 224 (cont.)
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC

Outputs:
24 V DC Relay
Supply voltage L+/L1
• rated value 24 V DC 100 to 230 V AC
• permitted range 20.4 to 28.8 V 85 to 264 V AC
(47 to 63 Hz)
Input current, typ. - -
• Max. incl. load 10 A at 28.8 V 20 A at 264 V
• Power consumption max. 110 to 700 mA 30 to 100 mA
(240 V)
60 to 200 mA
(120 V)
Output voltage for
sensors and transmitters
• rated value L+ (24 V DC) 24 V DC
• permitted range 15.4 to 28.8 V 20.4 to 28.8 V
Output current for sensors
(24 V DC)
• rated value 280 mA 280 mA
• short-circuit protection electronic at
600 mA
electronic at
600 mA
Output current for expansion
modules (5 V DC)
660 mA 660 mA
Integrated inputs 14 14
• Type optionally active
high and active
low per group

optionally active
high and active
low per group
Input voltage
• rated value 24 V DC 24 V DC
• for "1" signal , min. 15 V 15 V
• for "0" signal 0 to 5 V 0 to 5 V
Galvanic isolation Optocoupler Optocoupler
• in groups of 6 and 8 6 and 8
Input current
• rated value for "1" signal 4 mA 4 mA
Input delay (at rated value of
the input voltage)
• for standard inputs every
0.2 to 12.8 ms
(selectable)
every
0.2 to 12.8 ms
(selectable)
• for interrupt inputs (I0.0 to I0.3)
0.2 to 12.8 ms
(selectable)
(I0.0 to I0.3)
0.2 to 12.8 ms
(selectable)
• for fast counters max. (I0.0 to I1.5)
30 kHz
(I0.0 to I1.5)
30 kHz
Connection of 2-wire BERO

• Permissible quiescent
current, max.
1 mA 1 mA
Cable lengths
• unshielded (not for high-
speed signals)
300 m 300 m
• shielded
- standard input
- high-speed counters)
500 m
50 m
500 m
50 m
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:
24 V DC Relay
Integrated outputs 10 (transistor)
switchable in
parallel for higher
output currents
10 (relay)
Rated load voltage L+/L1 24 V DC 24 V DC/
24 to 230 V AC
• permitted range 20.4 to 28.8 V DC 5 to 30 V DC/
5 to 250 V AC
Output voltage
• for "1" signal, min. 20 V DC L+/L1

Galvanic isolation Optocoupler Relay
• in groups of 5 and 5 3. 3 and 4
Output current max.
• for "1" signal
- rated value at 40 °C 0.75 A 2 A
- rated value at 55 °C 0.75 A 2 A
- min. current - -
• for "0" signal 10 µA0 mA
Sum of all output currents
(horizontal installation)
• at 40 °C, max. 3.75 A 8.0 A
• at 55 °C, max. 3.75 A 8.0 A
ON delay
• of the standard outputs, max. (O0.2 to O1.1)
15µs
(all outputs)
10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
2 µs
-
OFF delay
• of the standard outputs, max. (O0.2 to O1.1)
100µs
(all outputs)
10 ms
• of the pulse outputs, max. (A0.0 to A0.1)
10 µs
-
Operating frequency of the
pulse outputs

(A0.0 to A0.1) (A0.0 to A0.1)
• for resistive load 20 kHz -
Switching capacity of the
outputs
• for resistive load 0.75 A 2 A
• for a lamp load 5 W 30 W for DC
200 W for AC
Service life of the contacts
(number of switching cycles to
VDE 0660, Part 200)
• mechanical - 10 mill.
• at rated load - 100.000
Limitation of voltage induced
on circuit interruption, max.
1 W -
Short-circuit protection provide externally provide externally
Cable lengths
• unshielded 150 m 150 m
• shielded 500 m 500 m
Isolation
• between 24 V DC and 5 V DC 500 V DC 500 V DC
• betw. 24 V DC and 230 V AC - 1500 V AC
Dimensions (W x H x D)
in mm
120.5 x 80 x 62 120.5 x 80 x 62
W eight, approx. 360 g 410 g
14
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200

CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■
Technical specifications CPU 226
Program memory 8 kbytes
Data memory 5 kbytes
Memory cartridge (optional) 1 pluggable memory cartridge;
content identical to the integrated
EEPROM
Program backup Entire program maintenance-free in the
integrated EEPROM
Data backup • Entire DB 1 loaded from programming
device/PC into integral EEPROM;
maintenance-free
• Current DB 1 values in RAM, retentive
memory bits, timers, counters etc.
maintenance-free through super ca-
pacitor; optional battery for long-term
backup.
Backup time 190 h (min. 120 h at 40 °C);
200 days (typ.) with optional battery
module
Programming language LAD, FBD and STL
Program organization 1 OB, 1 DB, 1 SDB
Subroutines with/without parameter
passing
Program execution • free cycle (OB 1)
• interrupt-controlled
• time controlled (1 to 255 ms)
Subroutine levels 8

User program protection 3-level password protection
Operation set Bit logic operations, comparison opera-
tions, timer operations, counting opera-
tions, clock operations, fixed-point
arithmetic, floating-point arithmetic,
numerical functions, move operations,
table operations, logic operations, shift
and rotate operations, conversion oper-
ations, program control operations,
interrupt and communication opera-
tions, stack operations
Execution times for bit
operations
0.37 µs
Cycle time monitoring 300 ms (retriggerable)
Bit memories 256
• of these retentive 0 to 112 in EEPROM, selectable;
0 to 256, via super capacitor or battery,
selectable
Counter 256
• of these retentive 256, via super capacitor or battery,
selectabler
• counting range 0 to 32767
Timers 256
• of these retentive 64, via super capacitor or battery,
selectabler
• range 4 timers, 1 ms to 30 s
16 timers, 10 ms to 5 min
236 timers, 100 ms to 54 min
Integrated high-speed

functions
• Interrupt inputs 4 (4 rising edges and/or
4 falling edges)
• Counters 6 fast counters (each with 30 kHz),
32 bits (incl. sign), can be used as up/
down counters or for connecting 2
incremental encoders with pulse trains
offset by 90°; (max. 20 kHz (A/B-
Counter)); with parameterizable enable
and reset inputs;
Interrupt options (inc. calling a
subroutine with any content) on
reaching a specified value;
Reversal of counting direction etc.
• Pulse outputs 2 high-speed outputs, 20 kHz, with
interrupt option; pulse width and fre-
quency modulation possible
Interfaces 2 RS 485 communication interfaces,
optionally:
• as PPI interface with PPI protocol for
programming functions, HMI
functions (TD 200, OP), S7-200-
internal CPU/CPU communication;
Baud rates 9.6/19.2/187.5 kbit/s
• or as MPI slave for data exchange
with MPI masters (S7-300/S7-400
CPU’s, OP’s, TDs, push-button
panels); S7-200-internal CPU/CPU
communication is not possible in the
MPI network;

transmission rates 19.2/187.5 kbit/s
• or as user-programmable interface
with interrupt capability for serial data
exchange with non-Siemens devices,
e.g. at ASCII protocol baud rates:
0.3/0.6/1.2/2.4/4.8/9.6/19.2/38.4 kbit/
s;
at 1.2 to 38.4 kbit/s the PC/PPI cable
can be used as an RS232/RS458
adapter
Expansion bus
• Connection of expansion modules
(EM)
1)

Connectable programming
units/PC
PG 720 PII, PG 740 PIII,
PC RI45 PIII Tower, standard PC
Integrated inputs/outputs
• Plug-in I/O terminals Yes
• Digital inputs 24
• Digital outputs 16
• Analog potentiometer 2 analog potentiometers; 8 bit resolu-
tion
Max. number of inputs/outputs
• digital inputs/outputs 128 inputs and 120 outputs
• analog inputs/outputs 28 inputs and 7 outputs or
0 inputs and 14 outputs
• AS-Interface-

inputs/outputs, max.
31 AS-Interface slaves (CP 243-2)
Expansion, max. 7 expansion modules
1)
)
Degree of protection IP 20 in accordance with IEC 529
Ambient temperature
• with horizontal installation 0 to 55 °C
• when mounted vertically 0 to 45 °C
Relative humidity 5 to 95% (RH severity level 2 in accor-
dance with IEC 1131-2)
Atmospheric pressure 860 to 1080 hPa
Other environmental
conditions
see “S7-200 Programmable
Controller, system manual”
1) Only S7-22x series expansion modules can be used. Because of the limited output current, the use of expansion boards can be subject to
restrictions.
15
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226
■
Technical specifications CPU 226 (cont.)
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:

24 V DC Relay
Supply voltage L+/L1
• rated value 24 V DC 100 to 230 V AC
• permitted range 20.4 to 28.8 V 85 to 264 V AC
(47 to 63 Hz)
Input current, typ. - -
• Max. incl. load 10 A at 28.8 V 20 A at 264 V
• Power consumption max. 150 to 1050 mA 40 to 160 mA
(240 V)
80 to 320 mA
(120 V)
Output voltage for sensors
and transmitters
• rated value L+ (24 V DC) 24 V DC
• permitted range 15.4 to 28.8 V 20.4 to 28.8 V
Output current for sensors
(24 V DC)
• rated value 400 mA 400 mA
• short-circuit protection electronic at
approx. 1.5 A
electronic at
approx. 1.5 A
Output current for expansion
modules
1000 mA 1000 mA
Integrated inputs 24 24
• Type optionally active
high and active
low per group
optionally active

high and active
low per group
Input voltage
• rated value 24 V DC 24 V DC
• for "1" signal , min. 15 V 15 V
• for "0" signal 0 to 5 V 0 to 5 V
Galvanic isolation Optocoupler Optocoupler
• in groups of 13 and 11 13 and 11
Input current
• rated value for "1" signal 4 mA 4 mA
Input delay (at rated value of
input voltage)
• for standard inputs every
0.2 to 12.8 ms
(selectable)
every
0.2 to 12.8 ms
(selectable)
• for interrupt inputs (I0.0 to I0.3)
0.2 to 12.8 ms
(selectable)
(I0.0 to I0.3)
0.2 to 12.8 ms
(selectable)
• for fast counters max. (I0.0 to I1.5)
30 kHz
(I0.0 to I1.5)
30 kHz
Connection of 2-wire BERO
• Permissible quiescent

current, max.
1 mA 1 mA
Cable lengths
• unshielded (not for high-
speed signals)
300 m 300 m
• shielded
- standard input
- high-speed counters
500 m
50 m
500 m
50 m
Power supply: 24 V DC 100 to 230 V AC
Inputs:
24 V DC 24 V DC
Outputs:
24 V DC Relay
Integrated outputs 16 (transistor)
switchable in
parallel for higher
output currents
16 (relay)
Rated load voltage L+/L1 24 V DC 24 V DC/
24 to 230 V AC
• permitted range 20.4 to 28.8 V DC 5 to 30 V DC/
5 to 250 V AC
Output voltage
• for "1" signal, min. 20 V DC L+/L1
Galvanic isolation Optocoupler Relay

• in groups of 8 and 8 4, 5 and 7
Output current max.
• for "1" signal
- rated value at 40 °C 0.75 A 2 A
- rated value at 55 °C 0.75 A 2 A
- min. current - -
• for "0" signal 10 µA0 mA
Sum of all output currents
(horizontal installation)
• at 40 °C, max. 6.0 A 10.0 A
• at 55 °C, max. 6.0 A 10.0 A
ON delay
• of the standard outputs, max. (O0.2 to O1.1)
15 µs
(all outputs) 10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
2 µs
-
OFF delay
• of the standard outputs, max. (O0.2 to O1.1)
100 µs
(all outputs) 10 ms
• of the pulse outputs, max. (O0.0 to O0.1)
10 µs
-
Operating frequency of the
pulse outputs
(O0.0 to O0.1) (O0.0 to O0.1)
• for resistive load 20 kHz -
Switching capacity of the

outputs
• for resistive load 0.75 A 2 A
• for a lamp load 5 W 30 W for DC
200 W for AC
Service life of the contacts
(number of switching cycles to
VDE 0660, Part 200)
• mechanical - 10 mill.
• at rated load - 100.000
Limitation of voltage induced
on circuit interruption, max.
1 W -
Short-circuit protection provide externally provide externally
Cable lengths
• unshielded 150 m 150 m
• shielded 500 m 500 m
Isolation
• between 24 V DC and 5 V DC 500 V DC 500 V DC
• betw. 24 V DC and 230 V AC - 1500 V AC
Dimensions (W x H x D)
in mm
196 x 80 x 62 1960 x 80 x 62
W eight, approx. 550 g 660 g
16
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■

Technical specifications (cont.)
M L+ 0.0 0.1 0.2 0.3 M L+
1M 0.0 0.1 0.2 0.3 2M 0.4 0.5 M L+
CPU 221 24 V DC/24 V DC/24 V DC
4 outputs (24 V DC)
Power supply (24 V DC)
6ES7 211-0AA21-0XB0
6 inputs (24 V DC)

Power supply
(24 V DC) for
sensors or
expansion modules
(180 mA)
1M 0.0 0.1 0.2 0.3 2M 0.4 0.5 0.6 0.7 M L+
CPU 222 24 V DC/24 V DC/24 V DC
6 outputs (24 V DC)
6ES7 212-1AB21-0XB0
8 inputs (24 V DC)

Power supply
(24 V DC) for
sensors or
expansion modules
(180 mA)
Power supply
(24 V DC)
M L+ 0.0 0.1 0.2 0.3 0.4 0.5 M L+
CPU 224 24 V DC/24 V DC/24 V DC
10 outputs (24 V DC)

6ES7 214-1AD21-0XB0
14 inputs (24 V DC)

Power supply
(24 V DC) for
sensors or
expansion modules
(280 mA)
Power supply
(24 V DC)
1M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 2M1.0 1.1 1.2 1.3 1.4 1.5 M L+
1M 1L+ 0.0 0.1 0.2 0.3 0.4 2M 2L+ 0.5 0.6 0.7 1.0 1.1 M L+
1L 0.0 0.1 0.2 2L 0.3 N L1
CPU 221 100 - 230 V AC/24 V DC/relay
Power supply
(24 V DC) for
sensors or
expansion modules
(180 mA)
4 outputs (24 V DC/
24 - 230 V AC)
Power supply
(100 - 230V AC)
6ES7 211-0BA21-0XB0
6 inputs (DC 24 V)
1M 0.0 0.1 0.2 0.3 2M 0.4 0.5 M L+
1L 0.0 0.1 0.2 2L 0.3 0.4 0.5 N L1
CPU 222 100 - 230 V AC/24 V DC/relay
6 outputs (24 V DC/
24 - 230 V AC)

Power supply
(100 - 230V AC)
6ES7 212-1BB21-0XB0
8 inputs (24 V DC)
1M 0.0 0.1 0.2 0.3 2M 0.4 0.5 0.6 0.7 M L+

Power supply
(24 V DC) for
sensors or
expansion modules
(180 mA)
CPU 224 100 - 230 V AC/24 V DC/relay
6ES7 214-1BD21-0XB0
Power supply
(24 V DC) for
sensors or
expansion modules
(280 mA)
14 inputs (24 V DC)
10 outputs (24 V DC/24 - 230 V AC)
Power supply
(100 - 230 V AC)
1M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 2M1.0 1.1 1.2 1.3 1.4 1.5 M L+
1L 0.0 0.1 0.2 0.3 2L 0.4 0.5 0.6 3L 0.7 1.0 1.1 N L1
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
17
SIMATIC S7-200
CPUs
CPU 221, CPU 222, CPU 224, CPU 226

■
Technical specifications
(cont.)
CPU 226 24 V DC/24 V DC/24 V DC
16 outputs (24 V DC)
6ES7 216-2AD21-0XB0
24 inputs (24 V DC)

Power supply
(24 V DC) for
sensors or
expansion modules
(400 mA)
Power supply
(24 V DC)
1M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 1.0 1.1 1.21.3 1.4 2M 1.5 1.6 1.7 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 M L+
M 1L+ 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 2M 2L+1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 M L+
CPU 226 24 V DC/24 V DC/24 V DC
16 outputs (24 V DC/24 - 230 V AC)
6ES7 216-2BD21-0XB0
24 inputs (24 V DC)

Power supply
(24 V DC) for
sensors or
expansion modules
(400 mA)
1M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7 1.0 1.1 1.21.3 1.4 2M 1.5 1.6 1.7 2.0 2.1 2.2 2.3 2.4 2.5 2.6 2.7 M L+
1L 0.0 0.1 0.2 0.3 2L 0.4 0.5 0.6 0.7 1.0 3L 1.1 1.2 1.3 1.4 1.5 1.6 1.7 N L+
Power supply

(100 - 230 V AC)
18
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
CPU 221, CPU 222, CPU 224, CPU 226
CPUs
■
Ordering data
CPU 221
24 V DC supply,
24 V DC inputs,
24 V DC outputs
6ES7 211-0AA21-0XB0
100-230 V AC supply,
24 V DC inputs,
relay outputs
6ES7 211-0BA21-0XB0
CPU 222
24 V DC supply,
24 V DC inputs,
24 V DC outputs
6ES7 212-1AB21-0XB0
100-230 V AC supply,
24 V DC inputs,
relay outputs
6ES7 212-1BB21-0XB0
CPU 224
24 V DC supply,
24 V DC inputs,

24 V DC outputs
6ES7 214-1AD21-0XB0
100-230 V AC supply,
24 V DC inputs,
relay outputs
6ES7 214-1BD21-0XB0
CPU 226
24 V DC supply,
24 V DC inputs,
24 V DC outputs
6ES7 216-2AD21-0XB0
100-230 V AC supply,
24 V DC inputs,
relay outputs
6ES7 216-2BD21-0XB0
Memory cartridge MC 291,
EEPROM
for CPU 221/222//224/226 6ES7 291-8GE20-0XA0
Grounding terminal
10 ea. 6ES5 728-8MA11
Front flap set
contains various cover flaps for
CPUs and EMs;
spare part
6ES7 291-3AX20-0XA0
SIM 274 simulator (optional)
with 8 terminals 6ES7 274-1XF00-0XA0
with 14 terminals
6ES7 274-1XH00-0XA0
with 24 terminals

6ES7 274-1XK00-0XA0
Terminal block for
field levelwiring (optional)
12-pin, for CPU 221/212/222,
10 ea.
6ES7 290-2AA00-0XA0
Pluggable terminal block
(spare part)
with 7 interfaces (for CPU 22x) 6ES7 292-1AD20-0AA0
with 12 interfaces (for CPU 22x)
6ES7 292-1AE20-0AA0
with 14 interfaces (for CPU 22x)
6ES7 292-1AF20-0AA0
with 18 interfaces (for CPU 22x)
6ES7 292-1AG20-0AA0
PC-to-PPI cable 6ES7 901-3BF20-0XA0
5 m; with integral
RS 232C/RS 485 adapter,
between S7-200 and PC or data
terminal equipment such as print-
ers, bar-code readers;
Galvanic isolation by optocou-
plers
MPI cable 6ES7 901-0BF00-0AA0
5 m;
for connecting the S7-200 to MPI
Bus backplane extension cable
for interconnection of the two
rows of devices with double-row
configuration

• for CPU 221/222/224/226 6ES7 290-6AA20-0XA0
Optional battery module
6ES7 291-8BA20-0XA0
for CPU 221/222/224/226
Optional combined clock and
battery module
6ES7 297-1AA20-0XA0
only for CPU 221/222
S7-200 programmable
controller, system manual
for CPU 221/222/224/226 and
STEP 7-Micro/W in32 V3
German 6ES7 298-8FA21-8AH0
English
6ES7 298-8FA21-8BH0
French
6ES7 298-8FA21-8CH0
Spanish
6ES7 298-8FA21-8DH0
Italian
6ES7 298-8FA21-8EH0
STEP 7-Micro/WIN32 V3.1
programming software
see page 40
PROFIBUS IP 20 bus connector
with 90° cable outlet
• without PG interface 6ES7 972-0BA11-0XA0
• with PG interface
6ES7 972-0BB11-0XA0
PROFIBUS IP 20 bus connector

with 35° cable outlet
• without PG interface 6ES7 972-0BA40-0XA0
• with PG interface
6ES7 972-0BB40-0XA0
PROFIBUS-FC Standard Cable
6XV1 830-0EH10
for connection to PPI;
standard type with special design
for quick mounting, 2-core,
shielded, by the meter
delivery unit max. 1000 m,
minimum order quantity 20 m
Repeater RS 485 for PROFIBUS 6ES7 972-0AA01-0XA0
CP 5511
see page 45
CP 5611
see page 45
19
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
Digital expansion modules
EM 221, EM 222, EM 223
SIMATIC S7-200
■
Overview •Digital input/outputs to sup-
plement the on-board I/O of
the CPUs
•For flexible adaptation of the
controller to the task

•For expanding a system at a
later date with additional in-
puts and outputs
■
Application Digital expansion modules
provide additional digital in-
puts/outputs beyond the ex-
isting on-board digital inputs/
outputs.
Advantages for the user
include the following:
•Optimum adaptation:
The user can configure the
PLC with any combination of
expansion modules to meet
the precise needs of the ap-
plication. This eliminates un-
necessary investments.
Modules are available with
8, 16 and 32 inputs/outputs
•Flexibility:
The PLC can be upgraded
as the scope of the
application increases.
Modifying the user program
is extremely easy.
Note:
There are expansion modules
for the S7-21x and the S7-22x
series. CPUs of the S7-21x se-

ries can only be expanded us-
ing expansion modules of the
S7-21x series. CPUs of the
S7-22x series (CPU 222/224/
226) can only be expanded
using expansion modules of
the S7-22x series. Combined
use of the various series is not
possible.
■
Design The expansion modules have
the same design features as
the basic units.
• Assembly on a standard DIN
rail;
the modules are snapped
onto the rail to the right of the
CPU and are connected to
each other and to the CPU
by means of flexible integrat-
ed ribbon cables.
•Direct panel-mounting:
Integrated holes also permit
direct attachment to the pan-
els. This method is recom-
mended for applications
subject to vibration.
20
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70

SIMATIC S7-200
EM 221, EM 222, EM 223
Digital expansion modules
■
Technical specifications EM 221 digital input module
■
Technical specifications EM 222 digital input modules
1) 1 output up to 40 °C
2) see manual
Connectable to CPU 22x
Plug-in I/O terminals Yes
Number of inputs 8
• type choice of sink input or source
input per group
Input voltage
• rated value 24 V DC
• for ”1" signal 15 to 30 V
• for ”0" signal 0 to 5 V
Galvanic isolation Optocoupler
• in groups of 4
Input current
• for ”1" signal 4 mA
Input delay
• at rated value input voltage 4.5 ms
Connection of 2-wire BERO
• acceptable quiescent current 1 mA
Cable length
• unshielded 300 m
• shielded 500 m
Current consumption

• from backplane bus (5 V DC) 30 mA
• from sensor power supply or exter-
nal power supply (24 V DC)
-
Power loss typ. 2 W
Dimensions (W x H x D) in mm 46 x 80 x 62
W eight 150 g
DC Relay
Connectable to S7-22x series S7-22x series
Plug-in I/O terminals Yes Yes
Number of inputs 8 8
Rated load voltage L+/L1 24 V DC 24 V DC
24 to 230 V AC
• permitted range 20.4 to 28.8 V DC 5 to 30 V DC
5 to 250 V AC
Output voltage
• for "1" signal min. 20 V -
Galvanic isolation Optocoupler Relay
• in groups of 4 4
Output current max.
• for "1" signal
- rated value at 40 °C 0.75 A 2.0 A
- rated value at 55 °C 0.75 A 2.0 A
- min. current - -
• for "0" signal 10 µA0 mA
Sum of all output currents
• at 40 °C 3.0 A 8.0 A
• at 55 °C
(horizontal installation)
3.0 A 8.0 A

Maximum current per
conductor /group (mounted
horizontally and vertically)
3 A
parallel connec-
tion possible for
higher output
currents
8 A
DC Relay
Contact rating
1)
• for resistive load 0.75 A 2 A
• for inductive load 0.75 A 2 A
• for a lamp load 5 W 30/200 W (DC/AC)
Service life of the contacts
• mechanical - 10 x 10
6
• at rated load - 100.000
Inductive current interruption
voltage (internal) limited to
L+ - 48 V provide
externally
2)
Short-circuit protection provide externally provide externally
Cable length
• unshielded 150 m 150 m
• shielded 500 m 500 m
Current consumption
• from backplane bus (5 V DC) 50 mA 40 mA

• from sensor power supply or
external power supply (24 V
DC)
- 72 mA
(9 mA per
switched output)
Power loss, typ. 2 W 2 W
Dimensions (W x H x D) in mm 45 x 80 x 62 45 x 80 x 62
W eight 150 g 170 g
21
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
Digital expansion modules
EM 221, EM 222, EM 223
■
Technical specifications EM 223 digital input/output modules
1) 1 output up to 40 °C
4I/4O
8I/8O 16I/16O 4I/4O 8I/8O 16I/16O
Inputs: 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC
Outputs: 24 V DC 24 V DC 24 V DC Relay Relay Relay
Connectable to CPU 22x CPU 22x CPU 22x CPU 22x CPU 22x CPU 22x
Plug-in I/O terminals Yes Yes Yes Yes Yes Yes
Inputs 48164816
Input voltage
• rated value 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC 24 V DC
• for “1“ signal 15 to 30 V DC 15 to 30 V DC 15 to 30 V DC 15 to 30 V DC 15 to 30 V DC 15 to 30 V DC
• for “0“ signal 0 to 5 V 0 to 5 V 0 to 5 V 0 to 5 V 0 to 5 V 0 to 5 V
Galvanic isolation Optocoupler Optocoupler Optocoupler Optocoupler Optocoupler Optocoupler

•in groups of 444448
• tested for 500 V AC 500 V AC 500 V AC 500 V AC 500 V AC 500 V AC
Input current
• rated value for “1“ signal 4 mA 4 mA 4 mA 4 mA 4 mA 4 mA
Input delay
• at rated input voltage 4.5 ms 4.5 ms 4.5 ms max. 4.5 ms max. 4.5 ms max. 4.5 ms
Connection of 2-wire BERO
• acceptable quiescent
current
1 mA 1 mA 1 mA 1 mA 1 mA 1 mA
Outputs 48164816
Rated load voltage L+/L1 24 V DC 24 V DC 24 V DC 24 V DC/
24 to 230 V AC
24 V DC/
24 to 230 V AC
24 V DC/
24 to 230 V AC
• permitted range 20.4 to 28.8 V DC 20.4 to 28.8 V DC 20.4 to 28.8 V DC 5 to 30 V DC/
5 to 250 V AC
5 to 30 V DC/
5 to 250 V AC
5 to 30 V DC/
5 to 250 V AC
Output voltage
• for “1“ signal min. 20 V 20 V 20 V L+/L1 L+/L1 L+/L1
• for “0“ signal, with 10 kΩ
load max. 0.1 V DC 0.1 V DC 0.1 V DC - - -
Galvanic isolation Optocoupler Optocoupler Optocoupler Relay Relay Relay
• in groups of 4 4 4/4/8 4 4 4
Output current max.

• for “1“ signal 0.75 A 0.75 A 0.75 A 2 A 2 A 2 A
-min. current
Maximum current per
conductor/group
3 A3 A3/3/6 A8 A8 A8 A
Contact rating
1)
•for resistive load
•for inductive load
• for a lamp load 5 W 5 W 5 W 30/200 W
(DC/AC)
30/200 W
(DC/AC)
30/200 W
(DC/AC)
Service life of the contacts
(number of switching cycles)
to VDE 0660, Part 200
• mechanical - - - 10 mill. 10 mill. 10 mill.
• at rated load - - - 100.000 100.000 100.000
Inductive current interruption
voltage (internal) limited to
L+ - 48 V L+ - 48 V L+ - 48 V - - -
General
Short-circuit protection No No No provide
externally
provide
externally
provide
externally

Cable length
• unshielded 150 m 150 m 150 m 150 m 150 m 150 m
• shielded 500 m 500 m 500 m 500 m 500 m 500 m
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
22
SIMATIC S7-200
EM 221, EM 222, EM 223
Digital expansion modules
M L+ 2L 0.4 0.5 0.6 0.7
1L+ 0.0 0.1 0.2 0.3
Relay (for CPU 22x)
6ES7 222-1HF20-0XA0
8 outputs
(24 V DC/24 to 230 V AC)
■
Technical specifications EM 223 digital input/output modules (cont.)
4I/4O 8I/8O 16I/16O 4I/4O 8I/8O 16I/16O
General (cont.)
Current consumption
• from backplane bus 40 mA 80 mA 160 mA 40 mA 80 mA 160 mA
• from sensor power supply
or external power supply
(24 V DC)
- - - 72 mA 72 mA 72 mA
• from coil current
(24 V DC)
9 mA per output
with “1“ signal
9 mA per output

with “1“ signal
9 mA per output
with “1“ signal
Power loss typ. 2 W 3 W 6 W 2 W 3 W 6 W
Dimensions (W x H x D)
in mm
46 x 80 x 62 71.2 x 80 x 62 137.5 x 80 x 62 46 x 80 x 62 71.2 x 80 x 62 137.5 x 80 x 62
W eight approx. 160 g 200 g 360 g 160 g 300 g 400 g
DC (for CPU 22x)
6ES7 222-1BF20-0XA0
8 outputs (24 V DC)
2M 2L+0.4 0.5 0.6 0.7
1M 1L+ 0.0 0.1 0.2 0.3
DC (for CPU 22x)
6ES7 221-1BF20-0XA0
8 inputs (24 V DC)
2M 0.4 0.5 0.6 0.7
1M 0.0 0.1 0.2 0.3
DC (for CPU 22x)
6ES7 223-1BH21-0XA0
8 inputs (24 V DC)
8 outputs (24 V DC)
1M 1L+ 0.0 0.1 0.2 0.3 2M 2L+0.4 0.5 0.6 0.7
1M 0.0 0.1 0.2 0.3 2M 0.4 0.5 0.6 0.7
Relay (for CPU 22x)
6ES7 223-1PH21-0XA0
8 inputs 24 V DC
8 outputs 24 V DC/24 to 230 V AC
M L+ 1M 0.0 0.1 0.2 0.3 2M 0.4 0.5 0.6 0.7
1L 0.0 0.1 0.2 0.3 2L 0.4 0.5 0.6 0.7

23
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
Digital expansion modules
EM 221, EM 222, EM 223
DC (für CPU 22x)
6ES7 223-1BL21-0XA0
16 inputs (24V DC)
16 outputs (24 V DC)
3M 3L+ 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
2M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
DC (for CPU 22x)
1M 1L+ 0.0 0.1 0.2 0.3 2M 2L+0.4 0.5 0.6 0.7
1M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
■
Technical specifications (cont.)
■
Ordering data
EM 221 digital input module
for CPU 222/224/226
• 8 inputs, 24 V DC,
sink input and source input
6ES7 221-1BF20-0XA0
EM 222 digital output module
for CPU 222/224/226
• 8 outputs, 24 V DC 6ES7 222-1BF20-0XA0
• 8 outputs, relay
6ES7 222-1HF20-0XA0
EM 223 digital input/output

module
for CPU 222/224/226
• 4 inputs, 24 V DC,
4 outputs, 24 V DC
6ES7 223-1BF20-0XA0
• 8 inputs, 24 V DC,
8 outputs, 24 V DC
6ES7 223-1BH21-0XA0
• 16 inputs, 24 V DC,
16 outputs, 24 V DC
6ES7 223-1BL21-0XA0
EM 223 digital input/output
modules (continued)
• 4 inputs, 24 V DC,
4 outputs, relay
6ES7 223-1HF20-0XA0
• 8 inputs, 24 V DC,
8 outputs, relay
6ES7 223-1PH21-0XA0
• 16 inputs, 24 V DC,
16 outputs, relay
6ES7 223-1PL21-0XA0
Front flap set
contains various covering flaps
for CPUs and EMs;
spare part
6ES7 291-3AX20-0XA0
Pluggable terminal block
(spare part)
• with 7 interfaces

(for EM 221/222)
6ES7 292-1AD20-0AA0
• with 12 interfaces
(for EM 223)
6ES7 292-1AE20-0AA0
1M 0.0 0.1 0.2 0.3
N (-)
L (+)
Relay (for CPU 22x)
6ES7 223-1HF20-0XA0
4 inputs (24 V DC)
4 outputs (relay)
1L 0.0 0.1 0.2 0.3
1M 0.0 0.1 0.2 0.3
DC (for CPU 22x)
6ES7 223-1BF20-0XA0
4 inputs (24 V DC)
4 outputs (24 V DC)
1M 1L+ 0.0 0.1 0.2 0.3
DC (für CPU 22x)
6ES7 223-1PL21-0XA0
16 inputs (24V DC)
16 outputs (relay)
2M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
Relay (for CPU 22x)
N (-)
L (+)
N (-)
L (+)
N (-)

L (+)
2L 0.4 0.5 0.6 0.7
3L 0.0 0.1 0.2 0.3
4L 0.4 0.5 0.6 0.37
1L 0.0 0.1 0.2 0.3
1M 0.0 0.1 0.2 0.3 0.4 0.5 0.6 0.7
24
SIMATIC S7-200
EM 231, EM 232, EM 235
Analog expansion modules
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
■
Overview •Analog inputs and outputs
for the SIMATIC S7-200
•W ith extremely short conver-
sion times
•For connections of analog
sensors and actuators with-
out additional amplifier
•For performing even com-
plex automation tasks
■
Application Analog expansion modules
provide a means of using
analog input/output modules.
Advantages for the user in-
clude the following:
•Optimum adaptation;
using analog and digital ex-

pansion modules the user
can adapt the controller
even to complex tasks.
• Direct connection of sensors
and actuators;
12-bit resolution and differ-
ent input/output ranges per-
mit the connection of sen-
sors and actuators without
additional amplifier
•Flexibility;
the controller can be up-
graded as the scope of the
application grows. Modify-
ing the user program is ex-
tremely easy
Note:
There are expansion modules
for the S7-21x and the S7-22x
series. CPUs of the S7-21x se-
ries can only be expanded us-
ing expansion modules of the
S7-21x series. CPUs of the
S7-22x series (CPU 222/224/
226) can only be expanded
using expansion modules of
the S7-22x series. Combined
use of the various series is not
possible.
■

Design The expansion modules have
the same design features as
the basic units.
• Assembly on a standard DIN
rail;
the modules are snapped
onto the rail to the right of the
CPU and are connected to
each other and to the CPU
by means of flexible integrat-
ed ribbon cables.
•Direct wall mounting;
integrated mounting holes
also facilitate direct screw
attachment to walls. This
mounting method is recom-
mended for applications
subject to high vibration lev-
els.
25
Micro PLC SIMATIC S7-200
September 2000 Extract from Siemens Catalog ST 70
SIMATIC S7-200
Analog expansion modules
EM 231, EM 232, EM 235
■
Technical specifications EM 231 analog input modules
■
Technical specifications EM 232 analog output modules
Connectable to S7-22x series

Plug-in I/O terminals No
Number of inputs 4, differential
Polarity reversal protection No
Input ranges 0 to 5 V
0 to 10 V
2.5 V
5 V
0 to 20 mA
Acceptable input voltage for volt-
age input, max.
30 V
Acceptable input current for current
input, max.
32 mA
Galvanic isolation No
Analog-to-digital conversion time 250
µ
s
Converter 12 bits
Resolution Refer to manual
Noise suppression 40 dB, DC to 60 V
• for noise frequency 50/60 Hz
Common mode voltage max. 12 V
Displayable range of conversion
values
• unipolar signals 0 to 32.000
• bipolar signals -32.000 to +32.000
Characteristic linearization No
Temperature compensation No
Diagnostics LED, EXTF

Current consumption
• from backplane bus (DC 5 V) 20 mA
• from sensor power supply or exter-
nal power supply (24 V DC)
60 mA
Power loss typ. 2 W
Dimensions (W x H x D) in mm 71.2 x 80 x 62
W eight 183 g
Connectable to S7-22x series
Plug-in I/O terminals Yes
Outputs 2
Output ranges
• voltage outputs -10 to +10 V
• current outputs 4 to 20 mA
Load resistor
• for voltage outputs min. 5 kΩ
• for current outputs max. 0.5 kΩ
Galvanic isolation No
Resolution
• for voltage output 12 bits
• for current output 11 bits
Settling time
• for voltage output 100 µs
• for current output 2 ms
Displayable range of conversion
values
• unipolar signals 0 to 32.000
• bipolar signals -32.000 to +32.000
Operating error limit
(0 to 55 °C referred to output range)

• Voltage 2.0%
• Current 2.0%
Basic error limit (operating error
limit at 25 °C, referred to output
range)
• Voltage 0.5%
• Current 0.5%
General
Current consumption
• from backplane bus (5 V DC) 20 mA
• from sensor power supply or
external power supply
70 mA
Power loss typ. 2.0 W
Dimensions (W x H x D) in mm 46 x 80 x 62
W eight 148 g