公开(公告)号：US20240291268A1

公开(公告)日：2024-08-29

申请号：US18176322

申请日：2023-02-28

Applicant: Fisher Controls International LLC

Inventor： Chris Arnold ,  Gregory R. Bulleit ,  Davin Nicholas ,  Adam Wittkop ,  Marwan Saputera Brama ,  Stephen G. Seberger

IPC: H02H9/00 ,  H02H9/02 ,  H02H9/04

CPC classification number: H02H9/008 ,  H02H9/02 ,  H02H9/046 ,  F16K37/0066

Abstract: Process control instruments having local intrinsic safety barriers and methods of manufacturing the same are disclosed. An example field instrument for a process control assembly includes a non-protection compartment, intrinsically safe circuitry positioned in the non-protection compartment, a protection compartment, non-intrinsically safe circuitry positioned in the protection compartment, and local barrier circuitry positioned in the protection compartment to operatively couple the non-intrinsically safe circuitry to the intrinsically safe circuitry, the local barrier circuitry to prevent the intrinsically safe circuitry from receiving an electrical energy that is greater than an electrical energy threshold from the non-intrinsically safe circuitry.