KFD2-SR2-EX2 SIGNAL TRANSMITTER

Product Description

The KFD2-SR2-EX2.W is a 2-channel intrinsically safe signal transmitter/switch amplifier from Pepperl+Fuchs, designed to safely interface field devices (such as NAMUR proximity sensors or dry contacts) with PLC and control systems. It is widely used in hazardous area automation systems (Zone 0, 1, 2) to isolate and transfer digital signals safely.

This module acts as a signal conditioner, providing galvanic isolation between field inputs and control outputs while ensuring safe operation in explosive environments.

Key Features

• 2-channel isolated signal transmitter/switch amplifier
• Accepts NAMUR sensors or dry contact inputs
• Intrinsically safe input for hazardous area applications
• Relay output for each channel (control side)
• 24V DC supply with DIN rail mounting
• Line fault detection (LFD) for cable monitoring
• LED status indication for each channel
• Configurable normal / reverse operating mode
• High electrical isolation between input, output, and supply
• SIL 2 safety integrity level (IEC 61508 compliant)
• Suitable for Zone 0, 1, 2 industrial environments
• Fast response time (~20 ms switching)

Specifications

• Product Type: Signal Transmitter / Switch Amplifier
• Model: KFD2-SR2-EX2.W
• Manufacturer: Pepperl+Fuchs Pepperl+Fuchs
• Series: K-System
• Channels: 2 Channel isolated barrier
• Input Type: NAMUR proximity sensor / mechanical dry contact
• Output Type: Relay contact (Form C changeover)
• Supply Voltage: 20–30 V DC (typically 24 V DC)
• Power Consumption: < 1.3 W
• Switching Frequency: ≤ 10 Hz
• Response Time: ~20 ms
• Isolation: Galvanic isolation between input/output/supply
• Mounting Type: DIN rail (EN 60715)
• Protection Class: IP20
• Operating Temperature: approx. -20°C to +60°C
• Safety Rating: SIL 2 (IEC 61508 compliant)
• Application: Process automation, oil & gas, chemical plants, PLC interface, hazardous area signal isolation