PEPPERL+FUCHS KFD2-STC4-Ex1 Spark protection barrier

Pepperl+Fuchs KFD2-STC4-Ex1 Intrinsically Safe Signal Isolator / Spark Protection Barrier

The Pepperl+Fuchs KFD2-STC4-Ex1 is a single-channel intrinsically safe isolator and spark protection barrier designed to safely transmit analog signals from hazardous areas to control systems located in safe zones. It is particularly suited for applications where 4...20 mA signals from transmitters or sensors in Ex areas need to be reliably and safely connected to instrumentation in safe environments.

Technical Specifications

• Model: KFD2-STC4-Ex1

• Function: Intrinsically safe isolator and spark protection barrier for analog signals

• Number of Channels: 1 (single-channel)

• Signal Type: Analog 4…20 mA current signal

• Power Supply:

  • Voltage: 20…30 V DC

  • Typical: 24 V DC

  • Power consumption: approx. 0.8 W

• Input (Hazardous Area):

  • Input signal: 4…20 mA (from 2-wire or 3-wire transmitters)

  • Voltage drop: ≤ 2.5 V

• Output (Safe Area):

  • Output signal: 4…20 mA

  • Load resistance: ≤ 750 Ω

• Accuracy:

  • Transmission error: < 0.1% of span

  • Temperature drift: < 0.01% per °C

• Response Time: < 10 ms

• Isolation:

  • Galvanic isolation between input, output, and power supply

  • Test voltage: 2.5 kV AC

• Connection Terminals:

  • Removable screw terminals

  • Clearly marked for easy wiring

• Mounting:

  • DIN rail (35 mm, EN 60715)

  • Compatible with Power Rail system for power distribution

• Housing Material: Durable polycarbonate

• Dimensions (W × H × D): Approx. 20 mm × 119 mm × 115 mm

• Protection Class: IP20

• Operating Temperature Range: –20 °C to +60 °C

• Storage Temperature: –40 °C to +80 °C

• Humidity: Up to 95% RH, non-condensing

• Approvals: ATEX, IECEx, FM, CSA, EAC — suitable for use in Zone 0, Zone 1, and Zone 2 hazardous areas

Applications

This module is ideal for process industries such as oil and gas, chemicals, pharmaceuticals, and power generation. It provides safe and accurate transmission of analog signals from sensors or transmitters located in potentially explosive atmospheres to control equipment in the safe area.

Summary

The Pepperl+Fuchs KFD2-STC4-Ex1 is a reliable and compact spark protection barrier designed for high-precision transmission of 4…20 mA analog signals. Its intrinsic safety certification and robust isolation features make it suitable for demanding industrial applications where safety and signal integrity are critical.

On this page you will find the user manual for PEPPERL+FUCHS  KFD2-STC4-Ex1. Get detailed technical specifications, installation and operating instructions to ensure optimum performance and reliability.

Manual for PEPPERL+FUCHS  KFD2-STC4-Ex1

https://cpupartnergroup.com/image/pdf/PEPPERL%2BFUCHS%20KFD2-STC4-Ex1.pdf