Would like to preface this that I don't know a lot about electrical stuff but I try my best.
I am trying to control a HVAC duct damper with a raspberry pi. I have the power-open-power-close duct damper, a 2-channel relay to be controlled with 5vdc and I think can handle 24vac (I may be wrong) input. I also have a 120v to 24vac wall plug transformer.
I also tried this relay previously: https://www.amazon.com/gp/product/B0177WOT1E/ref=oh_aui_detailpage_o04_s01?ie=UTF8&psc=1
I have been able to get the power open and power close on the vent to work no problems by just wiring it without the relay so I know the transformer and duct are working. I am also able to control the relay with the raspberry pi which is indicated by the LED lights on the relay.
INPUTS on the relay
- IN1 - raspberry pi pin
- IN2 - raspberry pi pin
- VCC - 24VAC from transformer
- Nothing is connected to the COM's
- I have tried connecting to the NO and controlling it with the raspberry pi and just connecting either PO or PC on the vent to on of the NC outputs on the relay and neither work.
Connecting the 24VAC from transformer to either the PO or PC on the vent turns on the vent motor no problems.
The relays I have are exactly like the ones pictured in the amazon listings.