Robert J Plott

US Patent:

54883075, Jan 30, 1996

Filed:

Dec 22, 1993

Appl. No.:

8/172571

Inventors:

Robert J. Plott - Mentor OH

Assignee:

Namco Controls Corporation - Highland Hts. OH

International Classification:

G01R 3102

US Classification:

324555

Abstract:

A sensor interface for determining whether a three-wire or a two-wire sensor is coupled to the interface. In the case of a three-wire interface, the interface determines that the sensor is powered by a power supply through a selected contact in electrical communication with the sensor. For both two- and three-wire sensors the interface generates an output corresponding to a status of the attached sensor.