I have a gas fireplace that has a remote, which reverses polarity between +6V and -6V to turn the logs on and off. Is it possible to use a Kincony KC868-A16V3 to duplicate this?
Thanks
I don’t think it can directly switch bipolar voltages for you. The schematic that I looked at show that there are some MOSFET devices on each output channel, in two groups of 8, that share a common terminal that’s switched to the outputs.
I think that your best solution is to use that output to drive a SPDT relay, with the common connected to your fireplace control terminal, and the NO and NC terminals connected each to one of +6V and -6V. This could be a small reed relay or just about anything that can operate from 12V that you could switch with the A16 output.
I tried the easy way by connecting 2 outputs from the KC868-A16V3 directly to the gas valve since they are resting at ground and switch to positive when activated… but there just weren’t enough amps to trigger it.
I’m thinking you mean connecting something like this:
It’s not clear here if you have +6V /- 6V (12V) or +6V / 0V (6V).
That relay setup looks correct only if your intention is to trigger them one by one and your fireplace doesn’t mind to have +6V on both pins. Does that replicate the “original logic”?
The original logic is a momentary +6 to one terminal and ground to the other to turn the fireplace on then it disconnects. Then a momentary polarity switch to turn it off.
In my scenario, would it matter if both terminals are connected to +6 since there wouldn’t be a ground reference? I would trigger relay 2 to turn the fireplace on and relay 1 to turn it off.
Is there a better way to wire the relays?
Thank you for the help.
It’s only question of receiving end.
What you have there? Two optocouplers at opposite directions? Are you sure there’s no gnd reference?
Not sure.
This setup works with HA when connected to the remote. The remote, on the other hand, no longer works. If I disconnect the HA relays, the remote starts working again.
Since HA works and not the remote, I’m pretty sure the remote sends its pulse and then completely disconnects. It can’t send a pulse when the HA relays a re both sitting at ground.
Too much guessing to give good suggestions. How you discovered this 6V polarity swap? Can you post good photo of the circuit?
Pulsed polarity swap would mach with bistable solenoid valve control, but even in that case, it’s safer to wire your relays NC to negative side.
I think I’ll get another relay bank to disconnect the external 6V power supply until the automation is called. I’ll trigger that relay to reconnect the power first and then trigger whichever control relay is needed, On or Off.
I think that should work. I’ll post back when I’ve got it figured out.
Thank you for letting me bounce ideas off the group.
