KFD2-SR2-Ex1.W.LB Pepperl+Fuchs 1-channel isolated barrier 24 V DC 1 pcs

Pepperl+Fuchs KFD2-SR2-Ex1.W.LB – 1-channel isolated barrier for digital signals

The Pepperl+Fuchs KFD2-SR2-Ex1.W.LB is a highly reliable 1-channel isolated barrier designed to ensure intrinsic safety in industrial environments. It enables the transfer of digital signals from NAMUR sensors or dry contacts located in hazardous areas to non-hazardous areas. This switch amplifier is ideal for systems requiring high functional safety, achieving up to SIL 2 (SC 3) according to IEC/EN 61508.

Key Features:

• Model: KFD2-SR2-Ex1.W.LB.

• Manufacturer: Pepperl+Fuchs.

• Purpose: Intrinsic safety isolated barrier for digital signals from NAMUR sensors or dry contacts.

• Functionality:

  • Usable as a signal splitter (1 input, 2 outputs).

  • Relay contact output.

  • Fault relay contact output.

  • Line fault detection (LFD).

  • Reversible mode of operation.

• Technical Specifications:

  • Supply Voltage: 19 ... 30 V DC (from Power Rail or terminals 14+, 15-).

  • Rated Current: $\le 45mA$.

  • Power Dissipation/Consumption: $\le 0.9W$.

  • Input Parameters: According to EN 60947-5-6 (NAMUR).

    • Open circuit voltage/short-circuit current: approx. 8 V DC/approx. 8 mA.

    • Switching point/switching hysteresis: 1.2... 2.1 mA/approx. 0.2 mA.

    • Line fault detection: breakage $\le 0.1mA$, short-circuit $>6mA$.

  • Output Parameters:

    • Output I: signal; relay (terminals 7, 8, 9).

    • Output II: signal or fault message; relay (terminals 10, 11, 12).

    • Contact loading: 250 V AC/2 A/cos $\varphi >0.75$; 126.5 V AC/4 A/cos $\varphi >0.75$; 40 V DC/2 A resistive load.

    • Minimum switch current: 2 mA/24 V DC.

    • Energized/De-energized delay: approx. 20 ms / approx. 20 ms.

    • Mechanical life: 107 switching cycles.

    • Switching frequency: $\le 10Hz$.

  • Galvanic Isolation: Reinforced insulation between Input/Output, Input/power supply, Output/power supply, Output/Output according to IEC/EN 61010-1, rated insulation voltage 300 Veff​.

  • Ambient Temperature: -40 ... 70°C (-40 ... 158°F).

  • Degree of Protection: IP20.

  • Dimensions: $20\times 119\times 115mm$ ($0.8\times 4.7\times 4.5$ inches) (W x H x D).

  • Mounting: On 35 mm DIN mounting rail according to EN 60715:2001.

Unique Advantages or Features:

• High Functional Safety Level: Up to SIL 2 (SC 3) according to IEC/EN 61508, ensuring reliable operation in critical applications.

• Flexible Configuration: Configurable modes of operation and line fault detection function via DIP switches.

• Status Indication: LED indicators show relay output, power supply, and fault (LB/SC) status. In a fault condition, the relay reverts to its de-energized state, and LEDs indicate the fault according to NAMUR NE 44.

• Collective Error Message: Available when operated via Power Rail.

• Versatility: Suitable for both NAMUR sensors and dry contacts.

• Easy Installation: Mounts on a standard 35 mm DIN mounting rail.

   Technical datasheet