Descriere

Blu-ray (Otis folosește 3 fire)

Blu-ray (alte mărci folosesc 4 fire)

Lumină albă (3 linii pentru Otis)

Lumină albă (alte mărci folosesc 4 fire)

Lumină roșie (Otis folosește 3 fire)

Lumină roșie (alte mărci folosesc 4 fire)

A311 semafor roșu

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.