| 摘要 |
PROBLEM TO BE SOLVED: To provide a power supply device for a wireless relay that blocks the occurrence of an alarm indicating the disconnection of a wire when an alarm indicating the disconnection of the wire between the wireless relay and a receiver is not required without requiring the power supply device for the wireless relay in connecting the wireless relay to the receiver, and provide an alarm system including the power supply device for the wireless relay.SOLUTION: A power supply device 1 for a wireless relay includes: a pair relay terminals 21 connectable to a wireless relay 4 via a relay wire 11; a reception terminal 22 connectable to a receiver 5 via a reception wire 12; a reception disconnection monitoring circuit 23 that is connected to the reception terminal 22 and monitors the disconnection of the reception wire 12; and an artificial terminal resistor 24 to be connected between the relay terminals 21 when non-connection of the reception wire 12 is recognized in the reception disconnection monitoring circuit 23.SELECTED DRAWING: Figure 2 |
