Digital Inputs/Digital Outputs - Siemens SIMATIC S5 Manual

Operation

Digital Inputs/Digital Outputs

3.3.4
The digital inputs/outputs for all three axes are connected to the 25-pin connector X7 on the front
panel. You can connect current sourcing switches (contacts or two-wire BEROS) to the inputs.
The function signals (position reached) are output via short-circuit proof digital outputs.
Pin assignment of connector X7 for digital inputs/digital outputs
Connection for:
Socket
Limit switch axis 1
Reference switch axis 1
2
Limit switch axis 1
3
External start/stop axis 1
4
Limit switch axis 2
5
Reference switch axis 2
6
Limit switch axis 2
7
External startlstop axis 2
Limit switch axis 3
9
10
Reference switch axis 3
11 Limit switch axis 3
12 External statistop axis 3
Position reached axis 1
13
14 Position reached axis 2
15 Position reached axis 3
16
17...22 Not used
23 Special voltage
24 Special voltage
Special voltage
25
I = input; Q = output
The chassis for the special voltage is supplied via the
minus pole of the special voltage must be applied to the common chassis pole.
3-14
Q
Q
Q
Q
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