WALK-TEST CONTROL CIRCUIT FOR SECURITY ALARM DEVICE

摘要

An intrusion detector for monitoring a space has a sensor for generating detection signals in response to detections of events occurring in the space and an indicator for receiving the detection signals and for generating detection indications in response thereto. A controllable switch is operably interposed between the sensor and the indicator and operates to connect or disconnect the sensor and the indicator. A switch control circuit is connected to the switch. A test trigger device is connected to the control circuit to generate an initiate-test signal to the control circuit. The control circuit is also connected to the sensor and receives and counts detection signals. The control circuit controls the operation of the switch by generating a switch control signal in response to the initiate-test signal and to the counting of detection signals.