Inductive Sensor Normally Closed
05 November 2012
The new GG851S fail-safe inductive sensor from ifm electronic is reported to simplify some of the safety-related applications for such sensors simply by operating normally closed.
The safe-state, with the outputs high, is given when the target is not present, i.e. outside the 10mm enable zone, in the area known as the safe switch-off zone. If a metal object is in the enable zone, the outputs are switched on. It also has a wider operating voltage than earlier versions, allowing operation down to 12V DC.
The GG851S sensor has two OSSD outputs for connection to a safety relay or PLC The diagnosis of the different operating states is made via LEDs. No special target is required and the GG851S is fully flush mountable. The fail-safe sensor is certified to ISO 13849-1 PL d, IEC 61508 SIL 2 and IEC 62061 SIL cl2.
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