Patent ID: 8111139
Filing Date: 2012-02-07
Classification: H03K

Abstract:
1. An arrangement for monitoring a switching state of a switch, comprising: a monitoring circuit electrically connected to a first switch, as a switch to be monitored; said monitoring circuit comprising RFID electronics, an RFID antenna and a second switch, said RFID electronics comprising an output connected via a series circuit of the RFID antenna and the second switch with an input of the RFID electronics to cause the second switch to open or close the monitoring circuit dependent on the switching state of the second switch; said first switch and said second switch being coupled with each other to cause the switching state of the second switch to be controlled dependent on the switching state of the first switch so the switching state of the second switch represents the switching state of the first switch; and an RFID reader located within a reception range of said RFID antenna, said RFID reader being configured to inject a query signal into the monitor circuit via the RFID antenna to determine the switching state of the first switch as represented by the switching state of the second switch.