A functional module for a switch device control is disclosed. In at least one embodiment, the functional module includes—a communication unit having a communication interface for communicating with at least one further functional module and/or at least one coupling module,—a control unit connected to the communication unit and designed to receive signals transmitted from the at least one further functional module and/or the at least one coupling module to the communication unit and to transmit switch commands via the communication unit to the at least one further functional module and/or the at least one coupling module,—a first control current interface for the electric connection to a first switch device or an external energy supply unit, and—a second control current interface for supplying control current to the at least one further functional module and/or the at least one coupling module.