Common earth with power supply - SmartRelay 3 system

This wiring layout presupposes that the cab already has a power supply line connected to the outside world. In the cab, a voltage converter transforms the voltage and provides the power to the reader and SmartOutput modules. The power supply's earth is also used for the lift electronics as a common reference potential for data transmission between the reader, controller and SmartOutput module.

DANGER

Electric shock due to mains voltage

An electric shock may be caused when connecting the non-hazardous earth (low voltage) to a conductor which carries the mains voltage.

1. Only use conductors with a low-voltage potential (< 42 V) as a common earth cable!
2. Protect live cables, so people do not touch them accidentally!