KFD2-UT2-EX2 Pepperl+Fuchs Temperature Converter | SIL 2 Isolated Barrier

Global PLC Spare HUB Insight

The KFD2-UT2-EX2 serves as a high-density, 2-channel solution for complex temperature monitoring architectures. Beyond basic signal conversion, this module uniquely functions as a signal splitter, enabling a single field input to drive two independent control outputs—a critical requirement for redundant logic systems. Its ability to linearize diverse inputs while maintaining rigorous galvanic isolation makes the KFD2-UT2-EX2 a staple for engineers managing high-reliability thermal process control. We prioritize this unit for applications requiring seamless integration between hazardous area sensors and standard 4-20 mA control cards.

Engineering Specifications

• Manufacturer: Pepperl+Fuchs
• Model: KFD2-UT2-EX2
• Design: 2-Channel Isolated Barrier (Configurable as 1-input to 2-output splitter).
• Inputs: TC (Types B, E, J, K, N, R, S, T, L), RTD (Pt100, Pt1000, etc.), Potentiometers, and mV signals.
• Outputs: Two independent 0/4 mA ... 20 mA signals (Sink or Source).
• Functional Safety: SIL 2 compliant (IEC/EN 61508 / 61511).
• Diagnostics: Integrated line fault detection (LFD) and sensor burnout alerts via NAMUR NE43.
• Configuration: PACTware™ software via front-facing programming socket.
• Power Consumption: Max 1.53 W.
• Mounting: Standard 35 mm DIN Rail.

Operational Diagnostics & Versatility

• Dual-Channel Efficiency: Double the channel density per module, effectively reducing cabinet footprint in high-I/O count projects.
• Splitter Functionality: Effortlessly feed one process value to both a control PLC and an independent safety or recording system simultaneously.
• Active Fault Monitoring: Real-time detection of sensor breakage or short-circuits with configurable NAMUR-compliant error signaling (downscale/upscale).
• Precision Engineering: Optimized CJC (Cold Junction Compensation) ensures minimal drift under varying ambient industrial temperatures.

Typical Applications & Device Suitability

• Safety Instrumented Systems (SIS): Used where redundant temperature monitoring is mandatory to prevent process overshoots.
• Chemical Reactor Monitoring: Accurate signal conditioning for multi-point thermal probes in potentially explosive atmospheres.
• Legacy System Migration: Versatile input range allows for the modernization of older RTD/TC systems without replacing the primary field sensors.
• Redundant Control Loops: Perfect for critical pump or compressor monitoring where feedback must be routed to both local gauges and remote DCS nodes.

Shipping & Logistics

• Worldwide Dispatch: Reliable delivery via FedEx, UPS, or DHL.
• Priority Fulfillment: Standard processing within 24 to 48 hours for expedited project delivery.
• Reliability Promise: Every unit is backed by a 12-month comprehensive performance warranty.
• Package Contents: 1x KFD2-UT2-EX2 Universal Temperature Converter and technical installation guide.

Professional FAQ

Question: Can I use this unit to drive two different PLC cards from one temperature sensor?

Answer: Yes, the KFD2-UT2-EX2 is specifically designed to function as a signal splitter, allowing one input to be processed and transmitted to two independent output terminals.

Question: How do I handle the programming if I am not at the cabinet?

Answer: You require the PACTware™ software and a specialized programming cable that provides galvanic isolation, ensuring safe configuration without creating ground loops.

Question: What is the benefit of the 'Sink' vs 'Source' output configuration?

Answer: The 'Source' mode acts as a transmitter, while the 'Sink' mode requires an external loop power supply; choosing the right mode prevents voltage conflicts with your specific analog input module.

Question: Is the cold junction compensation (CJC) accuracy affected by mounting density?

Answer: While the unit is designed for compact DIN rail mounting, ensure adequate airflow, as the KFD2-UT2-EX2 dissipates heat; high-density mounting may slightly influence absolute CJC precision if ambient temperatures exceed 60 °C.

Question: Which software setting should I check if my RTD reading is drifting?

Answer: First, verify the lead resistance settings in PACTware™; for 2-wire RTDs, ensure your lead compensation parameters are correctly calculated to account for the physical distance from the sensor to the barrier.

Procurement Advisory

• Pre-commissioning: Always verify the sensor type (2-wire vs 3-wire RTD) in the software configuration before putting the loop under load.
• Inventory Tip: Standardizing on the KFD2-UT2-EX2 for all temperature loops significantly reduces the number of spare modules required in your warehouse, as it replaces almost all common temperature input types.
• Wiring Check: When utilizing the 1-input to 2-output configuration, ensure that your total load resistance across both outputs remains within the technical specifications to prevent signal saturation.

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