7.3.1
Indicators and Controls
Fault LEDs
A FAULT LED lights up
••
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.
Interface ( X3 )
Interface ( X4 )
Interface ( X4 ) Faulty
Fault Signal:
Interface ( X3 ) Faulty
Fault Signal:
Fault
Fault
50
34
18
33
17
1
50
33
17
34
18
1
50
34
18
33
17
1
50
33
17
34
18
1
IM 304
IM 314
Figure 7-11
Front Plates of the IM 304 and IM 314
The 304 and 314 Interface Modules
System Manual
7 - 16
C79000-B8576-C199-03