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77U (regular)

77N (regular)

77S (regular)

61N (regular)

61U (regular)

30 (regular)

77U (upgrade/with light and anti-drop)

77N (upgrade/with light anti-drop)

77S (upgrade/with light anti-fall)

The three gray 77U, 77N, and 77S are actually universal, and are bistable and normally open. There are model requirements corresponding to take pictures on it.

The ordinary type is controlled by a reed switch, and the upgraded type is controlled by a chip. The upgraded model has the advantages of having an indicator light, not afraid of falling, and high and low temperature resistance. The voltage range of the ordinary type is 0-250V, the voltage range of the upgraded version is 0-36V, and the voltage used for normal elevator leveling is about 24V, both of which can be used.