MrHappy Posted July 16, 2023 Share Posted July 16, 2023 might work, might not.... Quote Mr Veritas God Link to comment Share on other sites More sharing options...
MattH Posted July 17, 2023 Author Share Posted July 17, 2023 Splendid - thanks MrHappy It'll likely be the weekend now, but I'll give it a go and let you know how I get on. Cheers Matt Quote Link to comment Share on other sites More sharing options...
MattH Posted July 28, 2023 Author Share Posted July 28, 2023 Thanks again for the suggested wiring MrHappy - finally had the chance to try it today... Initially it didn't work, but after I connected COM to positive rather than negative the sounder now works as it should. No joy with the strobe though. The only time the strobe flashes is for about 10 seconds after the alarm sets, but it doesn't then flash when the alarm is triggered and the siren is sounding. For some reason there's a trigger from STB in the panel for those ten seconds after the alarm is set, but it doesn't happen when the alarm is triggered, if that makes sense. Any thoughts? If it's any help I looked at the back of the PCB of the bell box and it is manufactured by Elmdene... Cheers Matt Quote Link to comment Share on other sites More sharing options...
MrHappy Posted July 28, 2023 Share Posted July 28, 2023 Pos applied for EWD is ring not what I'd expect, but I never worked for chubb... Is the stobe output programmable ? (eg someone could have it programmed as set or similar ? ) Quote Mr Veritas God Link to comment Share on other sites More sharing options...
MattH Posted July 29, 2023 Author Share Posted July 29, 2023 It's possible. I only know that the panel was installed by Chubb in 2010, and they connected it to the existing 1988 bell box. Looking in the old bell box, the strobe is actually standalone, and wired directly to the panel across STB and positive. I'll have another play with it later on. Quote Link to comment Share on other sites More sharing options...
MattH Posted July 29, 2023 Author Share Posted July 29, 2023 Got there in the end! You were right that COM needed to be negative, however HOFF then needed to be connected to NC rather than NO. Strobe also working when connected to NC. Don't know if it will carry on flashing after an alarm but I can live with that. Not sure why the connection in the panel marked strobe behaves as it does but not any use with this bell box. Many thanks again for your help, MrHappy . I don't think I'd have got there without the pointer. Cheers Matt Quote Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted July 29, 2023 Share Posted July 29, 2023 NC? the output must be inverted in the panel then. Quote Link to comment Share on other sites More sharing options...
MattH Posted July 29, 2023 Author Share Posted July 29, 2023 Yeah, picking this up as I go along, but that was my reckoning too when measuring the voltage across positive and NC/NO when set vs triggered with com to negative. Ignore the wire colours as is the cat5 I used to bench test but here's a pic of each end and working... Quote Link to comment Share on other sites More sharing options...
sixwheeledbeast Posted July 29, 2023 Share Posted July 29, 2023 I assume the phone cable is temporary? Quote Link to comment Share on other sites More sharing options...
MattH Posted July 30, 2023 Author Share Posted July 30, 2023 I used a length of cat5 to bench test the box, but otherwise all the wiring is from 1988. The Chubb box is now mounted on the wall outside in place of the old box and tested Quote Link to comment Share on other sites More sharing options...
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