The KFD2-UT2-Ex2 from Pepperl+Fuchs is a high-performance 2-channel isolated barrier tailored for demanding temperature signal conditioning applications. This device accepts a wide array of inputs, including thermocouples, RTDs (2- or 3-wire), potentiometers, and millivolt signals. It provides two independent analog current outputs, each configurable for 0-20 mA or 4-20 mA in sink or source mode. Furthermore, this unit functions exceptionally well as a signal splitter, allowing one input to drive two separate output loops. Safety integrity is assured with SIL2 certification per IEC/EN 61508. Its dual-channel architecture effectively doubles the processing capability while maintaining a compact 20 mm footprint.
This converter supports an extensive range of temperature sensors. For RTDs, it accepts Pt10, Pt50, Pt100, Pt500, and Pt1000 (EN 60751), along with GOST-standard types and Ni100 (DIN 43760). It handles 2- or 3-wire connections with a measuring current of approximately 200 µA. Thermocouple types include B, E, J, K, N, R, S, T (IEC 584-1), plus L (DIN 43710) and Russian standard TXK, TXKH, TXA. Additionally, the KFD2-UT2-Ex2 accepts potentiometer inputs up to 20 kΩ and voltage signals within -100 to 100 mV. Cold junction compensation is available in both external and internal modes, ensuring accurate temperature readings.
The device features two independent analog current outputs on the control side. Output I connects to terminals 7, 8, and 9, while output II uses terminals 10, 11, and 12. Each output provides a 0-20 mA or 4-20 mA signal with sink or source capability. The source load range is 0 to 550 Ω, with an open-circuit voltage ≤ 18 V. For sink mode, the voltage across terminals must be between 5 and 30 V. Importantly, the KFD2-UT2-Ex2 can operate as a signal splitter, taking one input signal and replicating it across both outputs. This feature proves invaluable when driving both a local indicator and a remote control system simultaneously.
Safety compliance is a cornerstone of the KFD2-UT2-Ex2 design. It achieves Safety Integrity Level (SIL) 2 according to IEC/EN 61508 and IEC/EN 61511, making it suitable for safety-related applications. The device carries multiple international approvals, including ATEX (CESI 04 ATEX 143) and IECEx (TUN 07.0003, CML 16.0126X) for hazardous area use. Its Ex-Input certification allows connection to sensors located in Zone 0, 1, or 2 (gas) and Zone 20, 21, or 22 (dust). Moreover, the input circuits provide safe electrical isolation with a voltage peak value of 375 V, ensuring intrinsic safety for field wiring.
Precision engineering ensures exceptional measurement accuracy. For Pt100 sensors (4-wire connection), deviation is ± (0.06% of measured value in K + 0.1% of span + 0.1 K). Thermocouple accuracy reaches ± (0.05% of measured value in °C + 0.1% of span + 1 K), including ±0.8 K cold junction compensation fault. The influence of ambient temperature is minimal, typically 0.0015% per K for RTDs and 0.02 K per K for thermocouples. Response times vary by input type: 1.1 s for 3/4-wire RTDs, 1.4 s for thermocouples, and 2.8 s for 3-wire potentiometers. These specifications guarantee reliable and repeatable performance across diverse operating conditions.
The KFD2-UT2-Ex2 features a compact housing type B2, measuring 20 mm wide, 119 mm high, and 115 mm deep. Its mass is approximately 130 g. The unit mounts easily on a 35 mm DIN rail according to EN 60715:2001. Screw terminals facilitate secure wiring connections. The enclosure offers IP20 protection, suitable for standard control cabinet installations. Operating temperature ranges from -20°C to +60°C, accommodating most industrial environments. Furthermore, the device includes front-facing LEDs for status indication and a labeling space for clear identification. Configuration is performed via the PACTware interface, accessible through a programming socket.
Begin by mounting the KFD2-UT2-Ex2 onto a 35 mm DIN rail, ensuring proper alignment with adjacent modules. Power is supplied via terminals 14 (+) and 15 (-) or through a Power Rail module, accepting 20-30 V DC. For input wiring, connect RTD sensors to terminals 1, 2, 3 (channel 1) and 4, 5, 6 (channel 2). Specifically, a 3-wire RTD uses terminals 1, 2, and 3. Thermocouple connections utilize terminals 1 (+) and 2 (-). Output connections are made at terminals 7-9 for output I and 10-12 for output II. Always use shielded twisted-pair cables for sensor wiring to minimize electromagnetic interference. Finally, configure device parameters using PACTware software, selecting input type, output range, and fault detection settings for each channel independently.
Your shipment includes one KFD2-UT2-Ex2 device. The package contains the unit with pre-installed terminal plugs. A quick-start guide is provided for basic setup reference. For detailed operation, please consult the comprehensive manual available online. We ship using Fedex, UPS, or DHL to ensure reliable and trackable delivery. Consequently, you can expect your order to arrive promptly and securely. Please note that the packaging does not include certificates or warranty documents.
1. Can the KFD2-UT2-Ex2 process two different sensor types simultaneously?
Yes, each channel operates independently. You can configure channel 1 for a Pt100 RTD and channel 2 for a type K thermocouple, for example. PACTware software allows individual parameterization for each input.
2. How does the signal splitter function work on this model?
When configured as a signal splitter, the KFD2-UT2-Ex2 takes the input from channel 1 and mirrors it to both output I and output II. This setup is ideal when you need to send the same process variable to two different receivers.
3. What happens if a sensor wire breaks during operation?
The device features line fault detection (LFD) and sensor burnout monitoring. Upon detecting a break, the output drives to a predefined fault signal (0 mA, 2 mA, or 21.5 mA) per NAMUR NE43, alerting your control system to the failure.
4. Is the KFD2-UT2-Ex2 suitable for hazardous area installations?
Absolutely. It carries ATEX and IECEx [Ex ia Ga] IIC certification. This allows connection to intrinsically safe sensors located in Zone 0, 1, or 2 hazardous areas, ensuring safe operation.
5. How long does it take for the output to respond to an input change?
Response time depends on the input type. Worst-case values are: 1.1 s for 3-wire RTDs, 1.4 s for thermocouples, and 2.8 s for 3-wire potentiometers. These figures assume sensor break detection is enabled.
| Brand Name | Pepperl+Fuchs |
| Model No. | KFD2-UT2-Ex2 |
| Product Type | Universal Temperature Converter |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
