Using Telemetry to Open Fire Station Bay Door

[caterpillar16]

I would like to use a Telemetry Cable PMKN4040A on an XPR7550 radio, and then run a wire (and ground) to a contact switch, so that, when programmed correctly, I can use a programmed button on another radio to signal the XPR7550 to send a telemetry signal to open the door. I don’t want to use it to close the door. I’ve seen some examples online, but they’re all related to an example where a water tank gets filled. Has someone done this before that can walk me through the correct configuration in CPS, and also tell me what protective measures I should install in the circuit to prevent damage to the radio?

 

[a417]

Do you need to use a portable radio, or can you use a mobile?

 

[caterpillar16]

Do you need to use a portable radio, or can you use a mobile?

I would prefer to use a mobile, but for right now, I think I’ll stick with a portable, mainly because I have a dozen of them laying around that can be put to use. I don’t have any spare mobiles at the moment. I’ll get one fairly soon if I can make this work. If there’s no way to do what I’m asking, I won’t bother getting another mobile. Hope that makes sense.

 

[ramal121]

I used a XPR5550 mobile to run a remote gate. In addition to opening the gate with a relay, I needed to use the inputs for status also (doorbell, gate open/closed). Because of this I used the telemetry I/O's for this project. The output to run the relay was quite wimpy and I had to dance a little with the interface to get it to work. Once I got it running it's been in service for a few years now with no problems.

If all you want to do is open a door I think it would be simpler to use Call Alert and run the door relay off the horn alert output. However horn alert is only available for the mobile.

 

[caterpillar16]

I used a XPR5550 mobile to run a remote gate. In addition to opening the gate with a relay, I needed to use the inputs for status also (doorbell, gate open/closed). Because of this I used the telemetry I/O's for this project. The output to run the relay was quite wimpy and I had to dance a little with the interface to get it to work. Once I got it running it's been in service for a few years now with no problems.

If all you want to do is open a door I think it would be simpler to use Call Alert and run the door relay off the horn alert output. However horn alert is only available for the mobile.

I haven’t thought about using Call Alert with horn alert output! That’s a good idea if I can scrounge up an old mobile! Thank you.