Patent ID: 7446670
Filing Date: 2008-11-04
Classification: H04Q,H05B

Abstract:
1. A load terminal for use in a remote controlled load management system including a central controller, one or more switch terminals and one or more load terminals which are connected for intercommunications with each other through a two-wire transmission line, respective addresses being set for the switch terminals and the load terminals, in which the central controller individually accesses the switch terminals and the load terminals by sending a transmission signal containing address data through the transmission line, generates control data based on monitoring data when receiving the monitoring data from a switch terminal which is manipulated during a response waiting slot set in synchronization with the transmission signal, and sends the control data to a load terminal having an address corresponding to that of the switch terminal from which the monitoring data is generated to control an illumination load connected to the load terminal, the load terminal comprising: a transmission signal transceiver unit for sending and receiving a transmission signal to and from the central controller; a power supply ON/OFF unit for allowing/cutting a power supply to the illumination load; and a control unit for, when a transmission signal including a control data instructing to turn off the illumination load is received by the transmission signal transceiver unit, starting to count a delay time and sending to the central controller monitoring data indicating that the illumination load has been turned off while controlling the power supply ON/OFF unit to keep the power supply to the illumination load; wherein the control unit restarts the count of the delay time when the transmission signal transceiver unit receives a transmission signal including a control data instructing to turn on the illumination load during the count of the delay time from the central controller, and controls the power supply ON/OFF unit to stop the power supply to the illumination load after termination of the count of the delay time in case the transmission signal transceiver unit receives no transmission signal including a control data instructing to turn on the illumination load from the transmission unit during the count of the delay time.