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:
Nov. 12, 2019
Filed:
Apr. 27, 2017
Rockwell Automation Asia Pacific Business Center, Pte. Ltd., Singapore, SG;
Rain Jilin Zhang, Singapore, SG;
Edward C. Hopsecger, Mentor, OH (US);
Joseph G. Vazach, Mentor, OH (US);
Rockwell Automation Asia Pacific Business Center, Pte. Ltd., Singapore, SG;
Abstract
An electrical relay system is configured to allow for failure detection of a relay by injecting a signal at a common contact of the relay and looking for the signal at a normally closed contact of the relay. If the relay is commanded to be 'off,' or closed, and the injected signal is not detected through the normally closed contact of the relay, then the system can determine that a failure condition has occurred. In one aspect, the system can include multiple relays with the signal being injected at a common node of the relays. In another aspect, the system can include multiple controllers for controlling and/or monitoring the electrical relay system. The electrical relay system can be coupled to screw terminals for connecting to a field device as part of an industrial automation system.