H - Electricity – 01 – H
Patent
H - Electricity
01
H
H01H 9/22 (2006.01) H01H 36/00 (2006.01)
Patent
CA 2281006
The invention relates to a contactless safety switch for detecting the shut position of a shutting part in relation to a closeable part, with a switch unit, supplied with current by an electrical supply source on one of the parts and with a trip arranged on the other part and comprising a magnet. In this case, the switch unit comprises a transmission circuit with a clock-signal generator and with a transmission coil, a receiver circuit connected to an evaluation unit and having at least one receiver coil and also a Hall sensor responding to the magnet, and the trip comprises a trip coil which is capable, in the shut position, of being excited inductively by the transmission coil and exciting the receiver coil, whilst, in the shut position, the evaluation unit triggers a clearance path when the Hall sensor is activated via the magnet.
Heuer Friedhelm
Kuhlmann Thomas
K.a. Schmersal Gmbh & Co.
Sim & Mcburney
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