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SAFE RELAY SYSTEM, OUTPUT EXPANSION UNIT FOR SAFE RELAY SYSTEM, OUTPUT END UNIT FOR SAFE RELAY SYSTEM, MASTER UNIT FOR SAFE RELAY SYSTEM, OUTPUT BLOCKING UNIT FOR SAFE RELAY SYSTEM, AND METHOD FOR CONTROLLING SAFE RELAY
SAFE RELAY SYSTEM, OUTPUT EXPANSION UNIT FOR SAFE RELAY SYSTEM, OUTPUT END UNIT FOR SAFE RELAY SYSTEM, MASTER UNIT FOR SAFE RELAY SYSTEM, OUTPUT BLOCKING UNIT FOR SAFE RELAY SYSTEM, AND METHOD FOR CONTROLLING SAFE RELAY
PROBLEM TO BE SOLVED: To provide a safe relay system etc., which is adaptive to increase in output such as the number of relays.;SOLUTION: In a safe relay system, a master unit 5B and one or more output expansion units 16 are connected to each other in series through a connection part. The master unit 5B obtains input states from respective safe components and a control signal generation part generates a control signal for operating a switching control part which controls switching of a safe relay according to the obtained input states. The generated control signal is outputted to the side of the output expansion units 16, which output the control signal from output unit output side connection parts to other units and operate switching control parts according to the control signal to switch safe relays, thereby controlling driving of externally connected equipment connected to the safe relays.;COPYRIGHT: (C)2005,JPO&NCIPI
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