PEPPERL+FUCHS KFD2-SL2-Ex2 184258 Spark protection barrier

Pepperl+Fuchs KFD2-SL2-Ex2 (184258) Intrinsically Safe Signal Isolator / Spark Protection Barrier

The Pepperl+Fuchs KFD2-SL2-Ex2 (184256) is a dual-channel signal isolator and intrinsic safety barrier designed to safely transfer digital signals from hazardous areas to control systems located in safe zones. It is part of the K-System product line and is suitable for use in Ex zones where protection against sparks or excessive energy transfer is required.

Technical Specifications

• Model: KFD2-SL2-Ex2

• Part Number: 184258

• Function: Intrinsically safe signal isolator and spark protection barrier

• Number of Channels: 2 (dual-channel)

• Signal Type: Digital input (e.g., from NAMUR sensors, mechanical contacts, proximity switches)

• Power Supply:

  • 20 to 30 V DC via Power Rail or terminal block

  • Typical supply voltage: 24 V DC

• Input:

  • Type: Intrinsically safe input

  • Input signal: per DIN EN 60947-5-6 (NAMUR)

  • Open-circuit voltage: Approx. 8 V

  • Short-circuit current: Approx. 8 mA

  • Switching threshold: < 1.2 mA (OFF), > 2.1 mA (ON)

• Output:

  • Transistor output (open collector) per channel

  • Load current: max. 50 mA per channel

  • Voltage drop: ≤ 1 V at 20 mA

• Response Time: < 10 ms

• Isolation:

  • Between input, output, and power supply

  • Test voltage: 2.5 kV AC

• Mounting:

  • DIN rail (EN 60715)

  • Compatible with Power Rail system

• Connection Terminals: Screw-type removable terminals

• Housing Material: 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 Range: –40 °C to +80 °C

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

• Approvals: ATEX, IECEx, CSA, FM, EAC for use in hazardous zones (Zone 0/1/2)

Applications

This device is commonly used in hazardous process automation environments such as petrochemical, chemical, pharmaceutical, and oil & gas facilities. It is intended for safely interfacing field signals like limit switches, proximity sensors, or other binary transmitters located in explosive atmospheres with control systems in the safe area.

Summary

The Pepperl+Fuchs KFD2-SL2-Ex2 (184256) is a compact, high-reliability solution for galvanically isolating and transmitting intrinsically safe digital signals from hazardous zones. With dual independent channels and compatibility with the Power Rail system, it provides efficient and certified protection against spark risks in critical applications.

On this page you will find the user manual for PEPPERL+FUCHS  KFD2-SL2-Ex2. Get detailed technical specifications, installation and operating instructions to ensure optimum performance and reliability.

Manual for PEPPERL+FUCHS  KFD2-SL2-Ex2

https://cpupartnergroup.com/image/pdf/184259_eng.pdf