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:
May. 27, 2003
Filed:
Apr. 24, 2000
Keith E. G. Emery, San Diego, CA (US);
George G Justice, Carlsbad, CA (US);
Hewlett-Packard Company, Palo Alto, CA (US);
Abstract
A system for connecting NPN sensors to current sinking inputs of a controller, and connecting PNP sensors to current sourcing inputs of a controller. A sensor output inverter uses back-to-back optoisolators and a voltage divider to generate an output signal at ground voltage when a ten to thirty volt reference voltage is applied to the input, and an output signal at the reference voltage when a ground voltage is applied to the input. The inverter circuit is preferably overmolded or potted in an in-line package using industry-standard three-pin male and female DIN-style connectors as output and input connectors respectively. The reference voltage and ground voltage are supplied to the inverter via these connectors. The sensor output inverter can be connected to a mating termination block, either directly or via cordsets, to form a water-resistant, submersible, sensor termination system.