About The Aprilaire 8024 24V Relay Card for General Purpose Use
The Aprilaire 8024 24V Relay Card is a general purpose , three relay, 24 volt, dry contact switching device. The Aprilaire 8024 24V Relay Card features three relays SPDT (Single-Pole, Double-Throw) that can all be switched independently with the coils that share a common coil.
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