Invention Grant
- Patent Title: Safety switching apparatus
- Patent Title (中): 安全开关装置
-
Application No.: US13027570Application Date: 2011-02-15
-
Publication No.: US08212431B2Publication Date: 2012-07-03
- Inventor: Thomas Nitsche , Boris Kaufmann , Johannes Hopp , Rolf Dickhoff
- Applicant: Thomas Nitsche , Boris Kaufmann , Johannes Hopp , Rolf Dickhoff
- Applicant Address: DE Ostfildern
- Assignee: Pilz GmbH & Co. KG
- Current Assignee: Pilz GmbH & Co. KG
- Current Assignee Address: DE Ostfildern
- Agency: Harness, Dickey & Pierce, P.L.C.
- Priority: DE102006010106 20060301
- Main IPC: H02H1/00
- IPC: H02H1/00

Abstract:
A safety switching apparatus for the failsafe disconnection of an electrical load has a first and a second terminal for supplying a first and a second signal from a signaling device, such as an emergency-off button. The safety switching apparatus also has a first and a second switching element which together produce a redundant output switching signal for disconnecting the load. The first switching element has a first control circuit to which the first signal is supplied. The second switching element has a second control circuit to which the second signal is supplied. The safety switching apparatus further has circuitry providing a first current path, an alternative second current path and at least one further switching element. The at least one further switching element is designed to select either the first or the second current path, depending on a polarity of the second signal, in order to route the second signal to the second control circuit.
Public/Granted literature
- US20110133574A1 SAFETY SWITCHING APPARATUS Public/Granted day:2011-06-09
Information query