InsaneGeek (Customer) asked a question.
Wiring DC actuator with 750-2c relay
I'm DIY playing around with a used 24vdc 2-wire actuator that I'm looking to be able to drive in both directions. I've got an old AutomationDirect 750-2c DPDT octal relay that I believe should be able to use, however I don't know how to properly wire it up to achieve this. Anybody able to give me some guidance?
Relay Base
Relay
Actuator I'm using
https://ciar.it/catalog/en/linear-actuator-kits/59-lm55-05.html
Your single relay gives you two states for your motor wiring and you need three:
1) Stopped
2) Run FWD
3) Run REV
You need a minimum of two relays.
Typically, you will reverse the polarity going to a DC motor to reverse direction of travel, so your relay wiring would look something like what is described here and I agree with Bernie's recommendation of 3 pole relays so you can interlock them to reduce possibility of a short circuit.
https://www.plctalk.net/threads/dc-motor-control.20148/#post-138494
Here's a wiring diagram of one way to do it.
And since it is a linear actuator, I would add in some over travel limit switches to the circuit.
Thanks for the responses, I believe I've figured out the correct wiring to switch polarity, I have a second relay for power control. For future reference if any one has a similar question this is what I came up with