Don Applegate Posted October 30, 2018 Share Posted October 30, 2018 I have a client that just bought a house with Crestron and we are converting over to Control4. They have a projector in a cut out with a door. the door is controlled via a D.C. actuator that when voltage is applied will open and when you reverse the voltage will close. I am not sure how to wire or program this. Has anyone out there encountered this situation? the wiring is in the Crestron phoenix connector so i might be able to transfer that but not sure what the programming would be since it is using 4 relays on the Crestron system. and no i can not extract the crestron info. it is dead. Link to comment Share on other sites More sharing options...
Cyknight Posted October 30, 2018 Share Posted October 30, 2018 Only need two relays actually. Your two wires to the actuator go to the common on the relays - then you take your power source (generally a 12v plug in but whatever it has now) then feed the positive from that into NO and negative into NC. From there in the system you would use a dual relay driver (blind driver for example). Likely need to set them to Hold type (default) but depends on the door. Open and close programming as normal. What will happen is that one relay closes, making that COM the positive, while the other remains open, the COM staying negative. And in reverse. When both are open for whatever reason (system reset) , both COM are negative with no power flowing. In the unlikely event they're both closed, they are both positive....which also is a safe stat with no power going. NOW note that this assumes you've made sure that this door operates on reversing voltage... Link to comment Share on other sites More sharing options...
twmoonly Posted October 30, 2018 Share Posted October 30, 2018 Why is it using 4 relays? Should be one relay for open one for close Link to comment Share on other sites More sharing options...
Don Applegate Posted October 30, 2018 Author Share Posted October 30, 2018 Just now, twmoonly said: Why is it using 4 relays? Should be one relay for open one for close That is what got me confused. Creston was using 4 relays to do this. I thought i was missing something in my 2 relay logic Link to comment Share on other sites More sharing options...
Cyknight Posted October 30, 2018 Share Posted October 30, 2018 3 minutes ago, twmoonly said: Why is it using 4 relays? Should be one relay for open one for close Oh I know why. Overthinking on the integrator part. I could draw up a schematic for this using 4 relays as well. UNLESS the relays used are SPST style relays. In that case it wasn't overthinking, just poor choice of relays Link to comment Share on other sites More sharing options...
jesseasmith Posted November 1, 2018 Share Posted November 1, 2018 There's actually several reversing relays in the security world. 405-03 is a GE part number for smoke detectors. It works off 12V or 24V I believe. May work for your application? Link to comment Share on other sites More sharing options...
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