Cynthia Posted October 4, 2007 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.
camerabloke Posted October 4, 2007 Posted October 4, 2007 thats a tamper circuit im afraid Eucam Security Systems 0845 4630 746 www.eucam.co.uk
Cynthia Posted October 4, 2007 Author 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.
camerabloke Posted October 4, 2007 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
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