Patent ID: 7802037
Filing Date: 2010-09-21
Classification: G05B

Abstract:
1. A communication network comprising: a master device; an actuator-sensor-interface (AS-I) communication bus; a device configured to be monitored and controlled; a slave device in communication with the master device via the AS-I communication bus, the device configured to be monitored and controlled operatively connectable to the slave device, and the slave device configured to receive commands from the master device via the AS-I communication bus, and to execute the commands to control the device; an actuator disposed and configured to actuate the device; and a sensor disposed and configured to sense a position of contacts in the device configured to be monitored and controlled and send a signal indicative of the sensed position of contacts in the device configured to be monitored and controlled to the master device; wherein if the master device determines that the contacts are in an abnormal closed state, within a predetermined period of time the master device sends a signal to the actuator to change to an off state.