S7-200 Smart Cpu - Siemens Simatic S7 Series System Manual

Product overview

1.1 S7-200 SMART CPU

1.1 S7-200 SMART CPU
The CPU combines a microprocessor, an integrated power supply, input circuits, and output
circuits in a compact housing to create a powerful Micro PLC. After you have downloaded
your program, the CPU contains the logic required to monitor and control the input and
output devices in your application.
The CPU provides different models with a diversity of features and capabilities that help you
create effective solutions for your varied applications. The different models of CPUs are
shown below. For detailed information about a specific CPU, see the technical specifications
(Page 570).
Table 1- 1 S7-200 SMART CPUs
Compact, non-expandable
Standard, expandable
Relay output
Transistor output (DC)
I/O points (built-in)
18
CR40 CR60 SR20
X X
X
X X X
40 60 20
ST20 SR30 ST30
X X X
X
X X
20 30 30
System Manual, 09/2015, A5E03822230-AC
①
LEDs for the I/O
② Terminal connectors
③
Ethernet communication
port
④ Clip for installation on a
standard (DIN) rail
⑤
Ethernet status LEDs
(under door): LINK, Rx/Tx
⑥ Status LEDs: RUN, STOP
and ERROR
⑦
RS485 Communication
port
⑧ Optional signal board
(Standard models only)
⑨
Memory card connection
(under door)
SR40 ST40 SR60
X X X
X X
X
40 40 60
S7-200 SMART
ST60
X
X
60