Security system and method for using an LF activated RFID tag

摘要

A security system includes a system control panel for arming and disarming a security system. A door sensing unit is mounted proximate to a door to be monitored. The door sensing unit includes a door contact, a radio frequency (RF) transceiver, and a low frequency (LF) transmitter. The door contact is configured to detect open and closed states of the door. The RF transceiver is interconnected with the system control panel over a network and the LF transmitter transmits an LF data packet when the door contact detects the open state of the door. A disarm device having an LF detection circuit detects the LF data packet. The disarm device transmits an RF disarm data packet based on the LF data packet. The RF transceiver transmits a disarm message to the system control panel over the network to disarm the security system based on the RF disarm data packet.