Question about the Opto 22 DC60MP DC Output Solid State Relay adn RC-4

[youngti]

I was wondering if using the Opto DC relays you could use two of them to switch a DC motors direction?  Say channel 1 for forward and channel 2 for backward.

Using a Prop1 and a RC-4 to say tun on the motor forward for a certain amount of time then turn is off.  Pause and then turn on reverse for same mount and the turn off.  Reset and be ready to go again.  There is a controller on the market that says it will do this but I already have the prop1 and two or three unused RC-4's so 25 buck for two relays would be better than the $80 for the controller.  (plus it's not EFX-TEK)  ;)

[JonnyMac]

To do a half-bridge you need opposing transistors -- using two of the same relays you would not have that.

If you just on-off/direction control you can do it with a couple low-cost mechanical relays and two outputs. In the diagram below OUT0 controls motor on/off, OUT1 controls direction.

[JonnyMac]

BTW, you should set OUT1 to the direction first, then, activate OUT0 to turn it on. Not a great idea (without speed control) to switch direction while the motor is running.

[youngti]

My idea was to use a limit switch to stop the motor and then change direction and start it again.

[bsnut]

My idea was to use a limit switch to stop the motor and then change direction and start it again.

That's fine. Are you going to have the limit switches connected to your controller? 

[youngti]

That is the idea.

[JackMan]

You could also do this with just 2 DPDT relays and no limit switchs if you can get the timing nailed down.