Kirjeldus

Blu-ray (Otis kasutab 3 juhtmest)

Blu-ray (teised kaubamärgid kasutavad 4 juhtmena)

Valge tuli (3 rida OTIS jaoks)

Valge tuli (teised kaubamärgid kasutavad 4 juhtmest)

Punane tuli (Otis kasutab 3 juhtmest)

Punane tuli (teised kaubamärgid kasutavad 4 juhtmest)

A311 punane tuli

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.