Relay Woes

[babinda01]

Hi
Just hoping someone may be able to help me out. I have a relay which is controlling my router on/off. This relay is tripping out my control randomly, mostly on turn off but sometimes on turn on. I have tried putting a 1n4004 diode across the coil (24VDC) of the relay, but I still am having troubles. I disconnected the router from the system so there is just the relay, but still troubles. Any thought on what else I can try.

Regards
Andrew

[Al_The_Man]

Usually the diode will cure that kind of problem, you appear to have pinned it down to the relay coil itself, so you could try a AC RC snubber (.1µfd in series 330ohm) as well across the coil, although this normally would not be needed, is your 24v supply common connected to the common ground plate?
I would guess your Control common is not connected to the 24vdc common?
Al.

[babinda01]

Hi Al,
Yes all my dc commons are tied to a common earth plate. I will try the RC and see if it helps any. Will let you know how it goes

Regards
Andrew