To perform test operation of a sensor connected to a sensor line of a relay apparatus from a fire receiver.
The fire receiving part is provided with a test input means designating the relay apparatus with a test function according to an address on a transmission line and designating the sensor with an automatic test function according to a branch number on the sensor line and a test control means transmitting a test control instruction designating the address and the branch number to the transmission line on the basis of input to the test input means. The relay apparatus with the test function is provided with a test relay means receiving the test control instruction and outputting a test operation instruction designating the branch number to the sensor line when the designated address is one's own address. The sensor with the test function is provided with a test operation means receiving the test operation instruction and changing to an operation condition when the designated branch number is one's own number.
ONCHI MUNEHIRO
HIRONAKA YASUO
