Signal Boards; Signal Modules - Siemens SIMATIC S7 System Manual

1.2

Signal boards

A signal board (SB) allows you to add I/O to your CPU. You can add one SB with either
digital or analog I/O. An SB connects on the front of the CPU.
● SB with 4 digital I/O (2 x DC inputs and 2 x DC outputs)
● SB with 1 analog output
1.3

Signal modules

You can use signal modules to add additional functionality to the CPU. Signal modules
connect to the right side of the CPU.
①
②
③
S7-1200 Programmable controller
System Manual, 11/2009, A5E02486680-02
① Status LEDs on the SB
② Removable user wiring connector
Status LEDs for the I/O of the signal module
Bus connector
Removable user wiring connector
Product overview
1.2 Signal boards
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