Descrizione

Blu-ray (Otis utilizza 3 fili)

Blu-ray (altri marchi usano 4 fili)

Luce bianca (3 linee per otis)

Luce bianca (altri marchi usano 4 fili)

Luce rossa (Otis utilizza 3 fili)

Luce rossa (altri marchi usano 4 fili)

A311 Light Red

The button is divided into blue light, white light, and red light, but the color of the light is different. For Otis, please buy 3-wire (Otis has no red light), other elevator brands please buy 4-wire, 3-wire and 4-wire cannot be used in common. 3-wire and 4-wire refer to internal wiring, not visible from the outside. There are 4 pins.