Secured detection system

摘要

The system has a detector (D3) whose output terminals (O1, O2) are connected to control relays (K1, K2) of an application to be secured to form a detection chain. The detector has a start-up input terminal (St) and a test output terminal (C1). A feedback loop (Br) is connected between the start-up input terminal and the test output terminal for monitoring the relays. Another detector (D2) is configured in an automatic start-up mode. The former detector is configured in a manual start-up mode, which is conditional upon an active state of inputs of the former detector and on the loop. The detectors are radio-identification detectors and Hall-effect detectors.