RLY02 - strange behaviour - Printable Version +- Comfort Automation/ Security System Forums (https://www.comfortforums.com) +-- Forum: Support (https://www.comfortforums.com/forum-2.html) +--- Forum: Problems & Troubleshooting (https://www.comfortforums.com/forum-36.html) +--- Thread: RLY02 - strange behaviour (/thread-1722.html)

- Nick Locke - 01-10-2010 This is all Comfort 1.  I have three RLY02 boards, connected via twelve core cables to: SEM (17-24) LEM (25-32) SEM (33-40) All 24 outputs are working as expected.  However, I have noticed that the LEDs on the RLY02 connected to the first SEM (outputs 17-24) glow dimly all of the time.  This seems to suggest that, although things are working, something is not quite right. I have checked the connections and everything seems to be ok.  Clues welcome on what kind of fault is likely to cause this behaviour. Thanks. - slychiu - 01-11-2010 This may happen if you have any load connected between the Slave Output and Common (Ground) The Comfort/Slave Output should be connected to OP op of the RLY01 and the Output centre pin to C This may also happen if you are using an  external voltage to drive the Realy coil, which is higher than the Comfort 12V. You can try connecting a 1 K resistor between OP and C of the RLY02 for each relay