Controller-fed reader with SmartOutput modules - SmartRelay 3 system

The reader is connected as described before (see Power supply through the controller). The SmartOutput modules are also powered via a power supply unit outside the cab. The SmartOutput modules' earth system must be connected to the controller's earth system.

NOTE

There is also no need for a power supply unit for the SmartOutput module if the controller has a 12 V_DC power supply unit. The SmartOutput module's V_IN is then not connected to its own power supply unit but to the controller's V_IN instead (compare Power supply through trailing cable).

WARNING

Overload in the power supply unit

The SmartOutput module and reader are additional power consumers. They may overload the controller's power supply unit and cause a fire.

1. Use a power supply unit which is designated for the total continuous currents for all connected components.