alterEGO Posted January 2, 2011 Share Posted January 2, 2011 No need for a relay. Wish people would read posts and not assume. lol, your sure its not a Nova 2? Link to comment Share on other sites More sharing options...
james.wilson Posted January 2, 2011 Share Posted January 2, 2011 i relay isnt essential paul but usually best. Problems occur on the possitive voltage (if opened etc) if not dioded, and also may go high res or even alarm when sounding as it will drift up slightly from hard neg. If it were me id use a relay. If i was bodging it id use a different value resistor. securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
Guest Oxo Posted January 2, 2011 Share Posted January 2, 2011 lol, your sure its not a Nova 2? Well OP said Oddy 3E [quotei relay isnt essential paul but usually best. Problems occur on the possitive voltage (if opened etc) if not dioded, and also may go high res or even alarm when sounding as it will drift up slightly from hard neg. If it were me id use a relay. If i was bodging it id use a different value resistor.] Its a neg return, M`s hated it. The early ones. Was probs a M problem cos 9651`s never had this issue. James you say you respect others opinions, trust me I have seen this fault and watched it carefully. Even to the point of getting ladders out and swapping the feeds and not putting it on the docket so the end user wasnt charged. EWD still SAB`s and shows a tamper. Perhaps its me then, careing too much. Link to comment Share on other sites More sharing options...
Frommo Posted January 3, 2011 Author Share Posted January 3, 2011 Thank you all for the replies and advice, just for my own curiosity, is this just a problem with the oddysey 3e or would this problem be common to all bell boxes. Link to comment Share on other sites More sharing options...
james.wilson Posted January 3, 2011 Share Posted January 3, 2011 its a voltage and cable size problem. As the 0v for the tamper return is sourced from the HO- when it goes into a alarm due to the current draw and voltage drop the 0v becomes slightly above 0v. this then affects the Tamper return and puts a slight positive voltage on the tamper return. Because the ref point has now moved it affects the zone. If you use a relay or wire the swicthes straight into the panel it avoides this problem. You can also use a diode and a modified resistor value depending on draw / cable length, but easier to use a relay imo. securitywarehouse Security Supplies from Security Warehouse Trade Members please contact us for your TSI vetted trade discount. Link to comment Share on other sites More sharing options...
9651 Posted January 4, 2011 Share Posted January 4, 2011 I've done it before with a relay (act 120L) Worked fine. Simply use the tamper return the trigger the relay. Wire the resistor into the C/NC. Link to comment Share on other sites More sharing options...
9651 Posted January 4, 2011 Share Posted January 4, 2011 Well OP said Oddy 3E Its a neg return, M`s hated it. The early ones. Was probs a M problem cos 9651`s never had this issue. James you say you respect others opinions, trust me I have seen this fault and watched it carefully. Even to the point of getting ladders out and swapping the feeds and not putting it on the docket so the end user wasnt charged. EWD still SAB`s and shows a tamper. Perhaps its me then, careing too much. Definitely an early M problem with the 3e. First few we fitted i was up and down the ladder, checking the voltage at the bell as the return was fine. As mentioned above, as soon as the bell was triggered the rtn voltage drops slightly. The cut off on the early panels for the rtn was obviously too low. Think i've seen it in the tech notes somewhere............. Link to comment Share on other sites More sharing options...
Guest Oxo Posted January 4, 2011 Share Posted January 4, 2011 Trouble was the M and Oddy were the staple panel of choice. Have to admit when the RED pcb was changed the problem went away. But by then G-2 20/44`s were being used more by then. Just remembered a job with a M750, had two Oddy 3`s one SAB one SCB no trouble. However it was fully loaded and had another PSU as well. And I had flashed it on the test bench as well before I took it to site. Strange the 9651 didnt find it an issue. All seem to be fine now though. Link to comment Share on other sites More sharing options...
9651 Posted January 4, 2011 Share Posted January 4, 2011 Yeah come to think it was the red pcb ones (can think of a few out there with butchered bell box tampers lol) 2 other engineers fitted a 2000 today, had a quick look, was amazed they've ditched the plug on connectors, impressed! Why have they ditched the 1000 now also? Seems a big jump form a 800 (3 nodes) to a 2000 with iirc 16 nodes? Link to comment Share on other sites More sharing options...
Guest Oxo Posted January 4, 2011 Share Posted January 4, 2011 They did that with the 800 too iirc. Cutting down on stock/procucts. Do seem to be pushing Scanny more imho. Link to comment Share on other sites More sharing options...
Recommended Posts
Archived
This topic is now archived and is closed to further replies.