Indicators And Controls - Siemens S5-135U/155U System Manual

Interface Modules
7.3.1

Indicators and Controls

Fault LEDs
A FAULT LED lights up
Figure 7-11
7-14
if the power supply fails in an expansion unit;
if there is no terminator at the last IM 314;
in the event of a cable open-circuit or wrong setting of DIL switch S3 for
the IM 304;
or if an EU which is ready and operational is connected to an interface
which is switched off.
34
1
18
Interface (X3)
Fault Signal:
33 17
50
Interface (X3) Faulty
Fault
Fault
Fault Signal:
Interface (X4) Faulty
34
1
18
Interface(X4)
33 17
50
IM 304
Front Plates of the IM 304 and IM 314
34
1
18
33 17
50
34 1
18
33
50 17
IM 314
System Manual
C79000-G8576-C199-06