×

Intrinsically safe field maintenance tool with power islands

  • US 20040218326A1
  • Filed: 04/30/2003
  • Published: 11/04/2004
  • Est. Priority Date: 04/30/2003
  • Status: Active Grant
First Claim
Patent Images

1. A hand held configurator for coupling to a two wire process control loop for use in configuring and monitoring field units coupled to the two wire process control loop, comprising:

  • a power supply;

    loop coupling circuitry configured to couple to the two wire process control loop;

    at least two power islands configured to electrically isolate electrical components in one power island from electrical components in another power island;

    independent power connections between each power island and the power supply; and

    a series resistor electrically connecting two power islands to limit energy transfer therebetween.

View all claims
  • 2 Assignments
Timeline View
Assignment View
    ×
    ×