Attempting to wire a bell to a minitor V amplifier base using the DIN connector on the rear. I have the relay and timed relay all working properly using an external trigger voltage but when I try to use the wires from the plug on the rear, I get nothing. Volt metered the outputs (during an active alert) and it doesn’t look like I’m getting any power out of those wires at all (at first I thought maybe not enough to trip the relay). I tried multiple bases and multiple pages and none will give any power out the dry relay contact wires. Any insight would be very helpful!
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Minitor V Accessory Port No Power?
- Thread starter mccuaigk
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It would help if you provided a schematic, but it sounds like what you're missing is the contacts provide no power, they simply short. You have to provide your own voltage source. That's why they're "dry".
Edit: so a typical wiring would be power supply positive -> dry contact, other dry contact -> relay coil, other relay coil terminal -> power supply negative.
Edit: so a typical wiring would be power supply positive -> dry contact, other dry contact -> relay coil, other relay coil terminal -> power supply negative.
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Most Motorola Minitor Bases have DRY CONTACTS that work either open or closed like a switch. You provide the power and it turns it on or off.
Correct. No power on the DIN.
Ok, I misread the manual thinking it was a low amp trigger signal. So rewired as you described and without drawing it out, this is the order of the wiring and just received an alert and no dice. I was using a 12V 0.3A power supply to stay under the 750mA continuous max but curious if it has to be 28vdc power supply? The 12v can trip the relay fine when connected directly. I tried quickly measuring the positive on the other side of the contact and no power was being passed through.
Power supply (+) to contact 2 wire, contact 3 wire to relay coil.
Power supply (-) direct into other relay coil
The figure above from the manual is looking into the base. Looking into the cable would be the mirror image, make sure you have the pinouts right. Test by using a piece of wire on the cable to jump the dry contacts, and also by using a multimeter to measure the resistance on the base contacts.
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