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Specification & Description
| Specification | Description |
|---|---|
| Part Number | KFD2-UT-EX1 |
| Alternative Part Number | KFD2UTEX1 |
| Manufacturer | Pepperl + Fuchs |
| Supply Voltage | 20 ... 35 V DC |
| Power Consumption | ≤ 1.5 W |
| Input Connection | Terminals 1, 2, 3 and 4; suitable for various RTDs and thermocouples |
| Output Voltage | 1 ... 5 V; 5.125 V at input signal overrange |
| Output Current | 4 ... 20 mA; 20.5 mA at input signal overrange |
| Lead Resistance | ≤ 50 Ω per lead |
| Measuring Current | Approx. 400 µA with resistance measuring sensor |
| Safety Maximum Voltage (Um) | 250 V |
| Accuracy | Pt100: ± 0.1 % of measurement value in K + 0.05 % of span + 0.1 K (4-wire connection) |
| Ambient Temperature | -20 ... 60 °C |
| Protection Degree | IP20 |
| Mass | Approx. 110 g |
| Electrical Isolation | Input/Output safe electrical isolation acc. to EN 50020, voltage peak value 375 V |
| Directive Conformity | Directive 94/9 EC (ATEX), Electromagnetic compatibility Directive 89/336/EC |
| Type of Protection | [EEx ia] IIC |
| Certification | TÜV 02 ATEX 1797 X, BASEEFA No. Ex 94C2435, CSA control drawing LR 65756-13 |
| Accessories | Power Rail PR-03, Power Rail UPR-03, Power feed module KFD2-EB2..., Adapter K-ADP1, PACTware™ |
| Response Time | ≤ 430 ms |
| EMC Compliance | NAMUR NE 21 |
| Suitable for Hazardous Areas | Yes, suitable for installation in division 2 |
| Entity Parameters | Voltage VOC 11.6 V, Current It 30.9 mA, Max. external capacitance and inductance specified |
| Temperature Classification | Group, category, type of protection, ¬ II 3 G EEx nA II T4 |
| Programming Interface | Available, no electrical isolation between the programming input and the supply and output |
| Climatic Conditions | According to DIN IEC 721 |
| Insulation Coordination | According to DIN EN 50178 |
| Electromagnetic Compatibility | According to EN 50081-2 / EN 50082-2 |
The Pepperl + Fuchs KFD2-UT-EX1 is a versatile signal converter designed to facilitate the connection of temperature sensors such as RTDs (Pt100, Ni100) and thermocouples (types B, E, J, K, L, N, R, S, or T) in hazardous areas. This single-channel unit is engineered to provide a reliable 4-20mA output, with an optional 1-5V output available. It boasts a 24V DC nominal power supply and offers exceptional accuracy within ±0.1%.
The KFD2-UT-EX1 is equipped with a range of adjustment options, allowing for precise calibration of temperature measuring ranges for resistance and voltage sensors. It supports 2-, 3-, or 4-wire configurations for RTDs and offers both internal and external cold junction compensation for thermocouples. Additionally, the device includes sensor burnout monitoring for thermocouples and sensor burnout and short-circuit monitoring for Pt100 sensors.
All settings on the KFD2-UT-EX1 can be configured via a serial interface to a PC, enabling online parameterisation for ease of use. The device can be factory set upon request, ensuring it is ready for immediate deployment in your system. The signal converter is also compliant with NAMUR NE 21 standards for electromagnetic compatibility, ensuring stable operation in industrial environments.
The KFD2-UT-EX1's robust design includes galvanic isolation between the input, output, programming output, and power supply, enhancing the safety and integrity of your signal processing. The unit's functionality is further enhanced by its programmable fault signal response, with a red flashing LED providing clear indication of any errors per NAMUR NE 44 recommendations.
Ideal for process automation applications, the Pepperl + Fuchs KFD2-UT-EX1 is a reliable and precise solution for temperature signal conversion in potentially explosive environments. Its compact and user-friendly design makes it a valuable addition to any industrial temperature monitoring and control system.
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Frequently Asked Questions
What types of sensors can be connected to this converter?
The KFD2-UT-Ex1 converter is designed to connect with RTDs such as Pt100 and Ni100, as well as thermocouples of types B, E, J, K, L, N, R, S, or T. It supports 2-, 3-, or 4-wire RTD configurations.
Can the KFD2-UT-Ex1 be used in hazardous areas?
Yes, the converter is suitable for use in hazardous areas and is certified with protection type [EEx ia] IIC, allowing for safe operation in such environments.
What is the power supply requirement for this converter?
The converter requires a rated voltage of 20 to 35 V DC, which can be supplied via Power Rail or directly through terminals 11+ and 12-.
How is the KFD2-UT-Ex1 converter programmed?
Programming of the converter can be done via a serial interface to a PC, allowing for online parameterisation and setting adjustments such as temperature range, wire configuration, and thermocouple type.
What output signals does the KFD2-UT-Ex1 provide?
The converter provides a 4-20 mA current output signal proportional to the measured temperature. There is also an optional voltage output of 1-5V.
Does the KFD2-UT-Ex1 offer any diagnostic features?
Yes, the converter includes sensor burnout monitoring for thermocouples and sensor burnout and short-circuit monitoring for RTDs, ensuring reliable operation and quick troubleshooting.
What is the accuracy of the temperature measurement with this converter?
The KFD2-UT-Ex1 offers an accuracy of ±0.1% for RTD measurements, ensuring precise temperature monitoring for critical processes.
Is the KFD2-UT-Ex1 compliant with EMC standards?
Yes, the converter is compliant with EMC standards according to NAMUR NE 21, ensuring minimal electromagnetic interference with other devices.
What are the ambient operating conditions for the KFD2-UT-Ex1?
The converter can operate within an ambient temperature range of -20 to 60°C, making it suitable for a wide range of industrial environments.
How is electrical isolation achieved in the KFD2-UT-Ex1?
The converter features safe electrical isolation according to EN 50020 between the input, output, and power supply, with a voltage peak value of 375 V, ensuring safety and preventing ground loops.
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