Siemens S5-135U/155U appendix Centralized Connection Fault

Models: S5-135U/155U

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Interface Modules

7.2.1Indicators 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.

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IM 301

IM 310

Figure 7-7 Front Plate of the IM 301 and IM 310

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System Manual

C79000-G8576-C199-06

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Siemens S5-135U/155U appendix Centralized Connection Fault