Pepperl+Fuchs KFD2-SR2-EX2.W Isolated Barrier | 2-Channel, Relay Output, SIL 2, SMART

Pepperl+Fuchs KFD2-SR2-EX2.W Isolated Barrier | 2-Channel, Relay Output, SIL 2, SMART

Pepperl+Fuchs KFD2-SR2-EX2.W barrier specifications. 2-channel isolated barrier, relay output, 24V DC, SIL 2, for proximity sensors.

Product Overview

The Pepperl+Fuchs KFD2-SR2-EX2.W is a 2-channel isolated barrier from the K-System. It is designed for the intrinsically safe operation of proximity sensors, mechanical contacts, and optical encoders located in hazardous areas (Zone 0/1, Zone 20/21). It transfers the switching status from the hazardous area to the safe area via two independent, volt-free relay outputs.

Technical Specifications

Key Features

• 2 Fully Independent Channels:​ Each channel operates autonomously with its own relay output

• Intrinsically Safe Input:​ Certified for connection to sensors in Zone 0/1 and Zone 20/21 hazardous areas

• Volt-Free Relay Contacts:​ Suitable for PLC interfacing and switching AC or DC loads

• SMART Technology:​ Supports sensor fault monitoring (line break, short circuit) per NAMUR NE44

• Functional Safety:​ SIL 2 certified per IEC 61508 for safety-related applications

• Galvanic Isolation:​ 3-port isolation (input, output, power) prevents ground loops

• LED Diagnostics:​ Clear visual indication of channel state and device status

• DIN Rail Mount:​ 35 mm mounting rail (EN 60715)

Applications

• **Signal transfer from NAMUR proximity sensors in hazardous areas

• **Switching status feedback from mechanical contacts or limit switches

• ​Isolated interface between safety PLC/DCS and field devices

• ​Sensor fault monitoring in chemical, oil & gas, and pharmaceutical industries

• ​SIL-rated logic input interfacing

Important Notes

1. **This barrier requires an external 24V DC power supply unit.

2. **Relay contacts are volt-free; external power is required to switch the load.

3. ​The device detects sensor line faults (wire break/short circuit) if a suitable NAMUR sensor is used.

4. ​For functional safety (SIL) applications, proper system integration and validation are mandatory.

5. ​Mounting is on standard 35 mm DIN rail; housing width is 20 mm.

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL and EMERSON to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.