Sounds like you need a 24V source to energize the coil, plus some way to control (ON/OFF) the 24V. You also need to confirm the 24V you're talking about is 24VAC as opposed to 24VDC. A 24VAC supply is pretty easy to provide, a 120V circuit feeding a 120V to 24V transformer. The 24V side of the transformer probably needs fuse protection sized to the transformer rating.

Radar

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