The new GG851S fail-safe inductive
sensor from ifm electronic simplifies
some of the safety-related applications
for such a sensor 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, outputs
are switched on. It 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. Diagnosis of
different operating states is made via
LEDs. No special target is required
and the sensor is flush mountable.