Description
Sensor dimmer and relay modules (Dxx and Rxx / EDxx and ERxx) provide feedback regarding the state of each circuit in the module. As a general rule, under normal conditions (load connected and the MCB on), both the Signal and Power LEDs should be in the same state regardless of signal level.
![Note: Note-Icon.png](https://support.etcconnect.com/@api/deki/files/26/Note-Icon.png?revision=1&size=bestfit&width=40&height=40) |
The signal LEDs are always green. The power LEDs are green in European modules, and red in US modules - but some old European modules may also have red power LEDs. The colour is not relevant; only the on or off state conveys information.
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