Communication System Manual 3WN1, 3WS1 Circuit-Breakers
102 Copyright Siemens AG 1998. All rights reserved. Version 1.0 (08/98)
4.5.3.2 Display elements
You can obtain information about the status of the device and the interfaces by checking the LEDs.
• Check the LED labeled "Device" for information about the device status.
• Check the LED labeled "Interface" for information about the status of the communication interfaces.
Device
If the "Device" LED is ... , then ...
green the interface module is ready for operation.
off no supply voltage is present.
red the interface module is defective and the status
indicated by the "Interface" LED is not valid.
Interface
If the "Interface" LED is ... , then ...
green interfaces 1 and 2 are ready for operation.
yellow interface 1 is not clear (= PROFIBUS-DP).
off interface 2 is not clear (= 3WN1/3WS1).
red interfaces 1 and 2 are both not clear.
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