Abstract: In a remote control system which is operated by way of a light wave guides, a monitoring device is provided for a remotely controllable load, the monitoring device measuring the current through the load and deriving values therefrom for the proper and the improper operating state of the load. All switches participating in the drive and monitoring functions with respect to the load are incorporated in a check concerning the operability of the monitor and of the load, the check being carried out during operation of the load.

Abstract: In a remote control system which is operated by way of light wave guides a specific switching routine is executed at the receiving side upon failure of the system. As long as the remote control system functions properly, cyclically alternating signals, triggered at the transmission side, set a logic element at the receiving side so that the loads are connected for normal command-responsive operation. When the signals fail, or when a transmission is intentionally suppressed, the logic element is conditioned to cause execution of the specific switching routine. Given the design of the remote control system as a light signal control for traffic signals, the switching routine causes the connection of the STOP signal with simultaneous disconnection of the GO signals of the respectively affected light signal.