Product overview
1.2 Expansion capability of the CPU
S7-1200 Programmable controller
System Manual, V4.2, 09/2016, A5E02486680-AK
31
Table 1- 3 S7-1200 expansion modules
The CPU supports one plug-in expansion
board:
• A signal board (SB) provides additional
I/O for your CPU. The SB connects on
the front of the CPU.
• A communication board (CB) allows
you to add another communication port
to your CPU.
• A battery board (BB) allows you to
provide long term backup of the
realtime clock.
Status LEDs on the SB
Removable user wiring connector
Signal modules (SMs) add additional func-
tionality to the CPU. SMs connect to the
right side of the CPU.
• Digital I/O
• Analog I/O
• RTD and thermocouple
• SM 1278 IO-Link Master
• SM 1238 Energy Meter
(https://support.industry.siemens.com/
cs/ww/en/view/109483435)
Status LEDs
Bus connector slide tab
③ Removable user wiring connector
Communication modules (CMs) and
communications processors (CPs) add
communication options to the CPU, such
as for PROFIBUS or RS232/RS485 con-
nectivity (for PtP, Modbus or USS), or the
AS-i master.
A CP provides capabilities for other types
of communication, such as connecting to
the CPU over a GPRS, LTE, IEC, DNP3,
or WDC network.
• The CPU supports up to three CMs or
CPs
• Each CM or CP connects to the left
side of the CPU (or to the left side of
another CM or CP)
Status LEDs
Communication connector
To Next Page
Loading...
