3WL air circuit breakers
3.5 External CubicleBUS modules
3WL/3VL circuit breakers with communication capability - PROFIBUS
64
System Manual, 03/2011, A5E01051353-02
3.5.1.7
LED indicator
The LEDs on the external CubicleBUS modules enable simple diagnostics and testing of the
module. As explained in the tables below, the internal status and the communication
connection can be diagnosed and thus the correct cabling can be checked.
The tables below provide an overview of the LED indicators:
DEVICE LED
The DEVICE LED indicates the status of the external CubicleBUS module:
Table 3- 12 DEVICE LED
DEVICE LED
Meaning
Red
Internal fault in the CubicleBUS module
Yellow
CubicleBUS module in test/force mode
Green
Module in operation
CubicleBUS LED
The CubicleBUS LED on the external CubicleBUS modules indicates whether there is a
communication relationship with other modules:
Table 3- 13 CubicleBUS LED
CubicleBUS LED
Meaning
Green
There is a connection to another CubicleBUS module.
Off
No other CubicleBUS module detected.
Other LEDs
All other LEDs indicate whether the outputs are set or the inputs are supplied with 24 V DC
and have thus been activated.
Table 3- 14 LEDs
All other LEDs
Meaning
Yellow
On the input module this means a high signal at the relevant input.
On digital output modules, the output is active and the contact is closed.
On the analog output module, a yellow LED indicates either that the full-
scale deflection value has been exceeded by 20% (in the case of V, I,
P),
or cos phi is greater than 0.8,
or the frequency is greater than 45 Hz.
Off
If none of the above listed statuses apply, the LED is off.