The original MMR elevator door sensor switch model SB-51CR.

There are two alternative methods:

1. Replacing with a photoelectric switch sensor:BEN10M-TFR1, BEN10M-TFR2

Power Supply: 24-240VAC / 24-240VDC

Technical Specifications:

Detection Object: Opaque objects, minimum diameter of 16mm

Light Source: Infrared LED (850nm)

Response Time: Maximum 20ms

Power Consumption: Emitter max. 4VA

Detection Distance: 10 meters

Wiring Length: 2-5 meters

Control Output: Relay output

2. Replacing with the universal light curtain ZY-20110:
Technical Parameters:
Using a light curtain to replace the door area photoelectric switch is a more advanced solution in terms of technology.
It greatly improves safety compared to the door area photoelectric switch.
Additionally, the durability of the replacement components is significantly better.
Therefore, we would recommend the second option as the preferred replacement method.