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1 indicators and controls, Interface modules – Siemens S5-135U/155U User Manual

Page 300

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7-10

System Manual

C79000-G8576-C199-06

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.

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 301

IM 310

Fault

Centralized
Connection

Distributed
Connection

Figure 7-7

Front Plate of the IM 301 and IM 310

Interface Modules