reverse polarity relay??

[OZEXPAT]

I am not anything remotely close to an electronics expert and am seeking help

I want to find a polarity reversing relay to control a linear actuator on a timer

I found a wiring diagram on line

It is described as a DPDT switch internally wired for polarity-reversal applications: only four rather than six wires are brought outside the switch housing

where can I find something like this - i am unsure by descriptions if I am looking for the right thing

 

[CocaCola]

You have the description, it's a DPDT (Double Pole - Double Throw) switch or relay... You can find them all over the place, try Google, Ebay or your local/Internet electronic component store...

 

[OZEXPAT]

You have the description, it's a DPDT (Double Pole - Double Throw) switch or relay... You can find them all over the place, try Google, Ebay or your local/Internet electronic component store...

I have seen DPDT but none set up internally for polarity switching. Can I do this outside the relay?

 

[CocaCola]

I have seen DPDT but none set up internally for polarity switching. Can I do this outside the relay?

Yes, the way you connect the wires produces the desired result...

 

[OZEXPAT]

thank you.

The comment that its set up internally threw me - I can do this!ou

thank y

 

[(*steve*)]

May not be useful, but...

In addition, you'll often see exactly the same wiring, but with each set of contacts on a different relay (i.e. two SPDT relays). This allows a motor to got forward, backward, or stop.

Normally the relays are wired to that when neither is powered, the motor is off.

 

[Six_Shooter]

As suggested two SPDT relays can be used.

Look up the wiring used to control door lock actuators in a vehicle. You will notice that when done this way that only one actuator is energized at a time, due to the at rest polarity of the system.