The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 30, 2009
Filed:
Jul. 27, 2006
Makoto Kawamura, Chiryu, JP;
Kuniyuki Niwa, Kariya, JP;
Sutemaro Kato, Kariya, JP;
Michael Niehaus, Florstadt, DE;
Makoto Kawamura, Chiryu, JP;
Kuniyuki Niwa, Kariya, JP;
Sutemaro Kato, Kariya, JP;
Michael Niehaus, Florstadt, DE;
JTEKT Corporation, Osaka-shi, JP;
Abstract
A safety PLC having duplex power supply circuits, includes: a first output-stage transistor; a first DC power supply that drives the first output-stage transistor; a second output-stage transistor; a second DC power supply that drives the second output-stage transistor; a signal transfer path that includes a resistor and connect the first output-stage transistor to the second output-stage transistor; and a pair of overvoltage protection units, each of which is disposed between a pair of output terminals of the corresponding one of the first and second DC power supplies and restricts the maximum value of an output potential difference between the pair of output terminals.