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

Interface Modules
7.2.1

Indicators and Controls

IM 301:
Fault LEDs
When the CPU is restarted, the red LED 1 and/or LED 2 lights up if the
internal supply voltage (5 V DC) or external load voltage (24 V DC) fails.
The IM 310 has no indicators or controls.
Figure 7-7
7-10
1
34 18
Centralized
Connection
33 17
50
Fault
Fault
Fault
34 1
18
Distributed
Connection
50 33 17
IM 301
Front Plate of the IM 301 and IM 310
1
34 18
50 33
17
34
1
18
50 33
17
IM 310
System Manual
C79000-G8576-C199-06