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ECB LED dilemma

Posted: Thu Jun 17, 2021 3:17 pm
by andynoiseboy
Hello All
I have an issue with the ECB dual LED mode when using a bi-colour LED. Because the 'Active' output (normally green) remains on during a fault condition, the addition of the 'Fault' output (normally red) has little effect on the visible colour. Green LEDs are almost always more efficient than red, and the ECB doesn't allow for any brightness control.

Am I alone in having this issue? Am I missing something?

TIA
Andy

Re: ECB LED dilemma

Posted: Fri Jun 18, 2021 1:24 pm
by rainier
The idea here is that the green LED shows the switch status and the red LED the fault status - if the switch is on and a fault active (breaker tripped) then both LEDS are on and the color should be yellow (or on some LEDS an orange color).

Bi-color LEDS tend to be matched in brightness so there should not be any issue - if you are using separate LEDS you can get a very wide variety of currents vs luminance - but it is always possible to match the brighter to the dimmer one by using a series resistor to reduce the current.