Cynthia Posted October 4, 2007 Share Posted October 4, 2007 Hi all. I have a question about the Honeywell EMPS-75 magnetic contact. This device has 5 terminals, 2 "silver-coloured" and the other 3 "brass-coloured". I've checked the 2 "silver-coloured" terminals with a meter and, sure enough, they close/short when the contact sections are brought together (this tells me it's a normally-closed reed switch, ready to be wired across the zone terminals in the panel). However, all the marketing material says that it also incorporates a tamper loop. I've checked all possible permutations across all of the other contacts, and everything is permanently open (infinite resistance). I just can't see how there can be a tamper loop in this device - the other 3 brass-coloured terminals don't seem to be connected to anything. I understand how to wire the dedicated tamper terminals (in my pirs) in series, such that any break in the terminal circuit opens/triggers the panel's tamper alarm. I just can't see what to do with this magnetic contact. Do I simply run this device's tamper wires to/from any one of the brass-coloured terminals (and that's all), leaving the last 2 brass-coloured terminals completely unconnected? Is that what Honeywell classes as a tamper circuit? Any advice would be appreciated... Cynthia. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/20925-tamper-terminalscircuit-on-emps-75-magnetic-contact/ Share on other sites More sharing options...
camerabloke Posted October 4, 2007 Share Posted October 4, 2007 thats a tamper circuit im afraid Eucam Security Systems 0845 4630 746 www.eucam.co.uk Link to comment https://www.thesecurityinstaller.co.uk/community/topic/20925-tamper-terminalscircuit-on-emps-75-magnetic-contact/#findComment-180201 Share on other sites More sharing options...
Cynthia Posted October 4, 2007 Author Share Posted October 4, 2007 thats a tamper circuit im afraid Wow! - I'm a little surprised! Thank you for your reply, camerabloke, I do appreciate it. So these devices don't contain an independent tamper switch (like most pirs do, for example). Honeywell's claim that this device has a "Tamper loop" would seem to be more a property of the tamper circuit wiring running to and from it, rather than anything to do with the device itself! Thanks again. Link to comment https://www.thesecurityinstaller.co.uk/community/topic/20925-tamper-terminalscircuit-on-emps-75-magnetic-contact/#findComment-180208 Share on other sites More sharing options...
camerabloke Posted October 4, 2007 Share Posted October 4, 2007 new grade 3 style contacts have a tamper switch on them, and can be a lot bigger than the one you have Eucam Security Systems 0845 4630 746 www.eucam.co.uk Link to comment https://www.thesecurityinstaller.co.uk/community/topic/20925-tamper-terminalscircuit-on-emps-75-magnetic-contact/#findComment-180222 Share on other sites More sharing options...
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