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Emerson DeltaV KJ2222X1-BA1
Emerson DeltaV KJ2222X1-BA1

Pepperl+Fuchs KFD0-TR-EX1

Product Introduction:​
The KFD0-TR-EX1 is an isolated barrier that accepts a resistance signal from a 2- or 3-wire Pt100 RTD located in the hazardous area and converts it linearly to a 4–20 mA current signal transmitted to the safe-area control system. It is loop-powered from the safe-area side and includes sensor-break detection.
Category:
Description
Technical Specifications:
  • Manufacturer:​ Pepperl+Fuchs GmbH
  • Model:​ KFD0-TR-Ex1
  • Input:​ 2- or 3-wire Pt100 RTD (IEC 751/ DIN 43760), α = 0.003851
  • Measuring Range (selectable via DIP switch):​ e.g. -50…+150 °C, 0…200 °C, 0…400 °C (typical ranges; refer to datasheet for complete table)
  • Output:​ 4–20 mA temperature-linearized, loop-powered
  • Sensor Break Detection:​ Yes — drives output to < 3.6 mA or > 21 mA (configurable)
  • Accuracy:​ ±0.2 % of selected span (typical)
  • Cold Junction Compensation:​ Not applicable (RTD)
  • Supply Voltage Requirement:​ Min. 12 V DC loop voltage; typical 24 V DC
  • Voltage Drop:​ ~6–8 V depending on loop
  • Intrinsic Safety (Field Side):​ Ex ia IIC T4/T5 Ga/Gb (Zone 0/1)
  • Safety Certification:​ ATEX, IECEx, FM, CSA; SIL 2 per IEC 61508
  • Housing Width:​ 12.5 mm
  • Mounting:​ 35 mm DIN rail
  • Ambient Temp:​ -20 °C to +60 °C
  • Protection:​ IP20
Functional Features:
  • Linearization built-in for Pt100 characteristic
  • DIP switches for range and sensor type selection
  • Loop-powered — no separate supply needed
  • Sensor lead resistance compensation (3-wire connection recommended)
Installation Notes:
  • Use 3-wire Pt100 for best accuracy; 2-wire acceptable with slight offset
  • Install in safe area cabinet
  • Verify minimum loop voltage at maximum measured temperature (allow for barrier drop + transmitter drop + cable IR)
  • Keep IS and non-IS wiring separated
Applications:​ Temperature monitoring in petrochemical, refinery, and pharma plants where RTDs are installed in classified hazardous zones and signals are fed to DCS analog inputs.
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