Stuck Relays
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Hey guys!
I've been playing around with my Neuron and I must say, I'm quite happy with how this device works. Got my groudn floor hooked-up to it and doing some great stuff with it.
-but-
After some weird behavior, I've found out that 2 of the relays that I'm using are locked in a closed (always on) position. RO2.01 and RO2.02 have this problem, and are used to turn on a Raspberry Pi and an 24" LED screen. Both of the don't draw too much power, and are seperatly hooked up to the device (Pi on 2.01 and screen on 2.02).
The LEDs on the neuron still indicate ON/OFF when triggered, and I hear a faint clicking of the relays... but when I use my multimeter, it's quite clear that they don't work.Is there a way to fix this without opening up my device and voiding my guarantee?
Thanks.
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@Jan-Teunis What do you mean by "after some weird behavior". So you measured the ROs with a multimeter that the relay is always on? And it has been working correctly before the "weird behavior"? Isn't there a chance that a different relay is being switched - Could you please check it??
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@tomas_hora I've checked it... the 2.01 and 2.02 worked for a while when I got the device and after about week of normal use (they are auto triggered a few times a day trough pimatic based on some rules) they didn't turn off all the time. I thought it was an error in my rules, or some problems with pimatic. But they are just "always on". I've even went so far as calling in a second opinion with a guy that knows more about electronics than me and he told me that it could be a fused relay.
What do you mean by a "different relay being switched"? When I trigger 2.01 the LED on the Neuron at 2.01 goes on, and off accordingly. Same for 2.02. I currently use half of the relays on my L203 so far.
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@Jan-Teunis Well the relay could have the contacts welded together... But it is weird that it would be caused by such low amperages.
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@tomas_hora exactly what I was thinking. Because that's the only stuff that has been connected to those relays.
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@Jan-Teunis said in Stuck Relays:
@tomas_hora exactly what I was thinking. Because that's the only stuff that has been connected to those relays.
Any news on how to resolve this issue?
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@tomas_hora Hi. I have the same behaviour. After switching the power supply of my notebook, the relay is always on. The noise of switch-on is the same, but the noise of switch-off is quieter compared with a working relay. The power supply is rated with 55W / 230VAC. Maybe the power on peak current welds the relay contects?
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Hello @hholenweg, are both contacts connected together even after you disconnect the power supply? If not, than yes, that could be the trouble...
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@hholenweg said in Stuck Relays:
@tomas_hora The noise of switch-on is the same, but the noise of switch-off is quieter compared with a working relay.
About the same behavior here. Still waiting for a solution or possible repair?
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Hello @tomas_hora, I've connected the notebook power supply once to R2.1 and once to R2.2. On both relays, after switch on the contacts are connected forever. R2.3 was never in use and is still working (shared COM with R2.2). Even if I disconnect everything, including UniPi power supply, the contacts R2.1 and R2.2 are in on state.
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@hholenweg Well, then the contacts are welded together as I thought it is. The relays in Neurons are really meant only as a system relays, not as the relays that should control the devices. The inrush current which any power supply can take is sometimes 50 times bigger than the nominal current.
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@tomas_hora I have the same problem. ( I connected 8x lights 6W https://www.t-led.cz/p/nl-mini-led-panel-6w-kulaty-120mm-10262)
I understand you clause (The inrush current which any power supply can take is sometimes 50 times bigger than the nominal current.) When relay in the NEURON is at 10A and circuit breaker too (10A).
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@kolopes Exactly... But the relays in Neurons are only 5A