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Latching refers to
Latching relays: can be divided into 1-coil latching type and 2-coil latching type.
(1) 1-coil latching relay: when the coil is energized, the contacts act; when the coil is de-energized, the contacts remain in the previous state, and the contacts are reset only when a reverse voltage is applied to the coil.
(2) 2-winding coil lock type relay: energize the setting coil and the contact will act; when the coil is de-energized, the contact will remain in the previous state, and the contact will reset only when the reset coil is energized.
