The VG Rope Brake Sensor Pack is supplied with bi-directional VG Rope Brakes, and is used specifically with the UMD-SRB02 Control Box.
The sensor pack is fitted to one of the VG Rope Brake units, where the sensor wheel is adjusted to align with the ropes to the lift car. Any subsequent movement of the lift car will cause the sensor wheel to rotate, which will in turn send a signal to the UMD-SRB02 Control Box. If the system has determined that the lift car is moving with the car doors open, the UMD-SRB02 Control Box will deploy the VG Rope Brakes to stop the elevator.
