tigers said:
But it was stated in a previous thread that the OPII will accept up to 5V on a zone.
Also I was pretty sure the OPII could send +5 V to devices.
Anyway I ordered it, as soon as it gets here and I have time to play with it a little we'll see. Think I'll use a relay in the worst case.
I checked with Omni tech support. But I fiddled around with the zone before I got their answer. Curiously enough they described exactly what I had already worked out! :nutz:
1. The trigger voltage must be between 5-12VDC
2. Place a 1Kohm resistor across the +/- terminals of the zone you want to use.
3. Connect the positive output lead of the trigger device to the zone's "+" terminal.
4. Connect the negative lead of the voltage source of the trigger device to the controller's ground terminal.
5. In the controller setup, Resistors (EOL) must be set to Yes and EOL resistors then must be used on
all Zones. In PCAccess this option is under Setup->Zones->Dealer options. If you don't have a dealer version of PCAccess I suspect you can set this through a control keypad. The factory default setting is "Yes."
Keep in mind this scenerio assumes that the power supply to the triggering device is shared with the Omni ground as stated in step 4 above. If the negative OUTPUT of your triggering device is not shared with it's negative INPUT then this won't work. In that case you may have to connect the negative output of your triggering device to the "-" terminal of the zone you're going to use. I haven't looked at the details of the voltage step down board you will need to convert the Omni's 12V to 5V for your triggering device.
One thing to note is that when there is NO voltage across the resistor the zone's status is "Secure." When the voltage is applied it reports "Not Ready." Keep this in mind when you plan your automation logic.
BTW - a similar hookup is described on page 3-6 of the 2006 HAI Applications directory; which is a GREAT source of info. It can be found here:
http://kb.homeauto.com (search for "application directory" and pick Application_Directory_0206.pdf)
Hope this helps. Let us hear back how it works out for you.