This module (M) may be extended by coupling additional exposure units.

Described is a circuit for coupling transmitter units (TR) to transmission lines (ÜL).

An electronic device is provided comprising a network interconnect means (NOC) for coupling processing units (IP).

The module comprises module fixing means, terminal block coupling means, and module expansion means.

This system is usable also for a current voltage supply of a signal receiver and a coupling-off/in of associated units or circuitry in connection with remote control of switching units.