PURPOSE: To realize read-back at all the positions of position selecting relays in a telecontrol output device with simple hardware configuration by summarizing return data.

CONSTITUTION: While receiving a command from a remote controller, a telecontrol part 1 selects positions to position decoders 21-23. Thus, the position decoders 21-23 operate the position selecting relays of position packages 310-339 at the selected positions. When one or more position selecting relays are operated, slot numbers are outputted from slots mounting the operated position packages 310-339, further, cage numbers are outputted from cages operating the position packages 310-339, and selected position numbers are outputted as well. These signals are returned through the position decoders 21-23 to the telecontrol part 1 as return data and analyzed so as to specify the operated position selecting relays.