Pepperl+Fuchs KFD2-ST3-Ex2

Overview

The Pepperl+Fuchs KFD2-ST3-Ex2 is a robust and highly reliable 2-channel isolated barrier, meticulously engineered to facilitate the secure transfer of digital signals from hazardous locations to safe area control systems. This indispensable device seamlessly integrates NAMUR sensors or dry contacts, ensuring critical data integrity and operational safety in demanding industrial environments. Each channel boasts an active transistor output, providing clear and decisive signal transmission. A cornerstone of its design is the comprehensive galvanic isolation between the input, output, and power supply, which safeguards against electrical interference and enhances overall system protection. The KFD2-ST3-Ex2 features advanced line fault detection (LFD) capabilities, proactively identifying lead breakage and short-circuit conditions. Its reversible mode of operation, easily configurable via DIP switches, offers exceptional flexibility to adapt to diverse application requirements. Furthermore, this switch amplifier is proudly SIL 2 certified in accordance with IEC/EN 61508, underscoring its commitment to high reliability and adherence to stringent safety standards for critical applications.

Key Features

• Input Flexibility: Compatible with both dry contacts and NAMUR sensors for broad application suitability.
• Dual Channel Design: Provides two independent channels for efficient signal processing.
• Active Transistor Output: Ensures robust and reliable signal switching.
• Superior Isolation: Features galvanic isolation between input, output, and power supply for enhanced safety and reduced interference.
• Advanced Diagnostics: Integrated Line Fault Detection (LFD) for prompt identification of wiring issues (lead breakage and short-circuit).
• Configurable Operation: Reversible mode of operation via DIP switches allows for application-specific customization.
• Safety Certified: SIL 2 certified according to IEC/EN 61508, guaranteeing high integrity in safety instrumented systems.
• Compact and Durable: Housed in a slim 20 mm wide enclosure with IP20 protection, ideal for DIN rail mounting.
• Wide Operating Temperature: Functions reliably in ambient temperatures ranging from -20 °C to +60 °C.
• Global Compliance: Multiple approvals including ATEX, IECEx, UL, CE, and UKCA ensure suitability for international markets.
• Easy Powering: Operates on 19–30 V DC via Power Rail or dedicated terminals.

Technical Specifications

• Signal Type: Digital Input
• Input Connections: Terminals 1+, 2+, 3- (Channel I); 4+, 5+, 6- (Channel II)
• Output Connections: Output I: terminal 7+; Output II: terminal 9+
• Open Circuit Voltage/Short-Circuit Current: Approx. 10 V DC / approx. 8 mA
• Switching Point/Hysteresis: 1.2–2.1 mA / approx. 0.2 mA
• Line Fault Detection (LFD) Thresholds: Breakage: I ≤ 0.1 mA; Short-Circuit: I ≥ 6.5 mA
• Response Time: ≤200 µs
• Switching Frequency: ≤5 kHz
• Rated Output Voltage: 30 V DC
• Rated Output Current: 100 mA
• Signal Level (Output): 1-Signal: (Supply voltage) - 3 V max. for 100 mA; 0-Signal: Blocked output (off-state current ≤10 µA)
• Galvanic Isolation: Input/Output and Input/Power Supply: Reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V_eff
• Indicators: LEDs for power supply, output status, and line fault alerts
• Configuration: DIP switches located on the device
• Mounting: 35 mm DIN rail (EN 60715)
• Dimensions (W×H×D): 20 × 119 × 115 mm
• Protection Class: IP20
• Ambient Temperature Range: -20 °C to +60 °C
• Weight: Approximately 150 g
• Part Number: 262111

Applications

• Process Automation Systems: Essential for reliable signal transfer in complex control loops.
• Chemical and Petrochemical Industries: Designed to meet the rigorous safety demands of explosive atmospheres.
• Oil and Gas Facilities: Ensures safe operation and monitoring in onshore and offshore environments.
• Pharmaceutical Manufacturing: Critical for maintaining safety and operational integrity in sensitive production processes.
• Water and Wastewater Treatment Plants: Provides robust and reliable solutions for instrumentation in harsh conditions.
• Power Generation: Used for monitoring and control in both conventional and renewable energy plants.
• Food and Beverage Industry: Compatible with stringent industrial hygiene requirements.

Why Choose This Model?

The Pepperl+Fuchs KFD2-ST3-Ex2 stands out as a premier choice for professionals seeking uncompromising reliability and safety in hazardous area applications. Its intrinsic safety design, coupled with comprehensive certifications like SIL 2 and ATEX, provides peace of mind that your operations are protected against potential risks. The device's advanced galvanic isolation critically prevents ground loops and electrical interference, safeguarding sensitive control systems. Its versatile input options, accommodating both dry contacts and NAMUR sensors, ensure broad compatibility with existing field instrumentation. The KFD2-ST3-Ex2's intelligent line fault detection minimizes downtime by quickly pinpointing wiring issues, while the configurable operating modes offer unparalleled adaptability to specific process requirements. Its compact, space-saving design is ideal for control cabinets where density is a concern, without compromising on performance or functionality. By choosing the KFD2-ST3-Ex2, you invest in a solution that combines Pepperl+Fuchs' renowned engineering excellence with a focus on ease of installation, robust diagnostics, and long-term operational stability, making it an intelligent investment for critical industrial infrastructure.

Order Now

Elevate the safety and efficiency of your industrial processes. Order the Pepperl+Fuchs KFD2-ST3-Ex2, Part Number 262111, today to experience a superior level of signal isolation and reliability. Contact our sales team or visit our website for further details and to secure your advanced 2-channel switch amplifier.