Siemens S5-135U/155U appendix Interface Fault Signal Interface X3 Faulty

Interface Modules

7.3.1Indicators and Controls

Fault LEDs

A FAULT LED lights up

Sif the power supply fails in an expansion unit;

Sif there is no terminator at the last IM 314;

Sin the event of a cable open-circuit or wrong setting of DIL switch S3 for the IM 304;

Sor if an EU which is ready and operational is connected to an interface which is switched off.

34 18		1		34 18		1
			Interface (X3)
50 33		17	Fault Signal:	50 33		17
			Interface (X3) Faulty
	Fault
	Fault
			Fault Signal:
34	18	1	Interface (X4) Faulty	34	18	1
			Interface(X4)
50 33		17		50 33		17
IM 304				IM 314

Figure 7-11 Front Plates of the IM 304 and IM 314

7-14	System Manual
	C79000-G8576-C199-06