Pepperl+Fuchs KFD2-SR2-Ex1.W Switch Amplifier | Isolated Barrier Relay Module

Product Overview

The Pepperl+Fuchs KFD2-SR2-Ex1.W is a high-performance 1-channel switch amplifier. It provides safe electrical isolation for signals in hazardous areas. This unit supports both dry contacts and NAMUR sensors. It features a robust relay contact output for reliable control. The K-System series ensures seamless integration into existing control loops. It maintains system integrity through advanced line fault detection.

Technical Specifications

• Brand: Pepperl+Fuchs
• Model: KFD2-SR2-Ex1.W
• Supply Voltage: 20 V to 30 V DC via Power Rail or terminals
• Input Compatibility: NAMUR (EN 60947-5-6) or dry contacts
• Output Type: Relay contact
• Switching Frequency: < 10 Hz
• Ambient Temperature: -20 °C to 60 °C
• Protection Degree: IP20
• Safety Rating: Up to SIL 2 (SC 3) according to IEC/EN 61508
• Electrical Isolation: 375 V peak value (Input/Output)
• Hazardous Area Protection: II (1) G D [EEx ia] IIC

Installation and Maintenance

• Mount the unit on a standard 35 mm DIN rail.
• Use the Power Rail system to reduce wiring time.
• Ensure the installation complies with local safety regulations.
• The module requires minimal maintenance due to its solid-state design.
• Front-side status LEDs provide immediate diagnostic feedback.

Compatibility and Certifications

• The device conforms to electromagnetic compatibility standards (EN 50081-2/EN 50082-2).
• It holds ATEX certification for explosive environments (Zone 0/1/2).
• The design supports integration with diverse PLC and DCS systems.
• It complies with NAMUR NE 21 standards for industrial interference immunity.

Application Scenarios

• Used for monitoring proximity switches in chemical plants.
• Ideal for level detection in hazardous zone storage tanks.
• Suitable for emergency shutdown systems requiring high reliability.
• Effective for valve position feedback in oil and gas refineries.

Global PLC Spare HUB Insight

The KFD2-SR2-Ex1.W stands out for its extreme reliability in mission-critical applications. Our technical team observes that this module excels when paired with high-precision sensors in volatile environments. It bridges the gap between field devices and control logic safely. Engineers choose this unit for its proven track record in extreme industrial conditions.

Purchasing Guide and Logistics

• Package Includes: 1x KFD2-SR2-Ex1.W module and technical documentation.
• Warranty: We provide a 12-month quality guarantee on all units.
• Shipping: We partner with FedEx, UPS, and DHL for global delivery.
• Lead Time: Orders process and ship within 24-48 hours.

Frequently Asked Questions

What happens if a lead breakage occurs?
The unit detects the fault immediately and switches the output to a predefined safe state to prevent hazards.

Can I replace an older K-System unit with this model?
Yes, the KFD2-SR2-Ex1.W is designed for backward compatibility within the K-System range.

How do I verify the safety parameters for my specific zone?
Always consult the provided control drawings (116-0035/116-0047) to ensure your field loop stays within the certified entity parameters.

Is this device suitable for high-speed counting applications?
No, the switching frequency is limited to < 10 Hz, so it is intended for status monitoring rather than high-speed pulses.

What is the advantage of using the Power Rail?
It eliminates the need for individual power supply wiring for each module, significantly reducing cabinet installation time.

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