Disclosed is a terminal block including: a fuse which is located between a power input terminal through which main power is supplied and at least one power output terminal for supplying power to each input/output device and is disconnected when overcurrent flows in the direction of the power output terminal; and a fuse disconnection detection unit which is electrically connected to the fuse and transmits a disconnection location of the fuse to an input/output control module. The fuse disconnection detection unit may include: a sensing unit which outputs signals at different levels depending on whether a fuse of a relevant channel is disconnected; and a multiplexing unit which transmits the location of the disconnected fuse from the output signal to the input/output control module.
