I am trying to control a linear actuator using a cheap remote controlled 2 channel relay (it controls a gate for my workshop dust collector). I'm think it's as simple as connecting each relay the same way...
NO: +12v from power supply
Comm: one motor line on relay 1 and the other motor line on relay 2
NC: neutral (ground? Or -12v???) from power supply
This gives me the following voltages on the common lines...
No relays activated = NC / NC = neutral
Relay 1 activated / relay 2 off = NO / NC = +12v
Relay 1 off / relay 2 activated = NC / NO = -12v
Both relay activated = NO / NO = 0V
I feel comfortable I got everything above right except that last line. If I put 12v on each side of the motor then I should have no voltage difference and therefore no current running through.
This thing sits around in one of these states all the time in a remot barn so I just want to confirm nothing is dangerous about my setup.
Is there a better way to do this? If above is safe then I have to remember to shut off each relay once the actuators reaches its end position (closed or open). What I need is a circuit tho if I press 1 it closes (+12v) and if I press 2 if opens (-12v). The linear actuator has a switch that opens once it has rich its final position. So trying to press 1 or 2 more times won't do anything until it goes the other way.
Thanks for any feedback or suggestions.