Indicators And Controls - Siemens S5-155U System Manual

The 301 and 310 Interface Modules
7.2.1

Indicators and Controls

7 - 12
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.
34
1
18
Centralized Connection
33
17
50
Fault
Fault
Fault
34
1
18
Distributed Connection
33
50 17
IM 301
Figure 7-7 Front Plates of the IM 301 and IM 310
34
1
18
33
50 17
34
1
18
33
50 17
IM 310
System Manual
C79000-B8576-C199-03