| 摘要 |
PROBLEM TO BE SOLVED: To prevent the collision of optical signals by specifying an originating network slave station at a network master station side and temporarily interrupting connection to another unrequired network slave station. SOLUTION: Incoming information originated from the one-network slave station is transmitted to the communication controller 3 of a network master station 1 with an optical receiver 5. The communication controller 3 decodes an incoming information address by an incorporated decoding circuit, specifies the originating network slave station and supplies a driving signal to the correspondence terminal of a driver circuit. Thus, the driver circuit energizes switch coil corresponding to the network slave station with a lead wire and permits the switch coil except that of the network slave station to be temporarily unenergized. In result, the network master station 1 is connected to the network slave station and disconnected to another slave station so that the collision of incoming signals is prevented. |
