How do I wire Solid State Relays to a linear actuator
With a simple switch type SSR you need to have a bipolar supply to use two of them.







simulate this circuit &ndash; Schematic created using CircuitLab

If you only have a single supply, you can use four of them in a full-bridge.







simulate this circuit

In both cases care must be taken not to turn on both sides at the same time.

Note: I also showed you how to add diodes to protect the SSRs from the switching spikes that may occur then the switches open. This may already be covered internally to the relays, but extra does not hurt.

You can also drive the actuator with a single, more traditional, mechanical change-over relay.







simulate this circuit