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Pepperl+Fuchs KCD2-UT2-Ex1
Overview
The KCD2-UT2-Ex1 is a universal temperature converter (signal conditioner / barrier) manufactured by Pepperl+Fuchs and supplied within Honeywell project channels for hazardous-area temperature measurement. It accepts RTD, thermocouple, potentiometer, or mV input from the field side (Zone 0, 1, 2 / Div. 1, 2) and converts it to a standard 0–20 mA or 4–20 mA analog current output on the control side. The device carries SIL 2 certification for functional safety loops.
Detailed content
Specifications
- Manufacturer: Pepperl+Fuchs (supplied as Honeywell-project compatible)
- Model: KCD2-UT2-Ex1
- Signal Type: Analog input
- Safety Integrity Level: SIL 2
- Supply Voltage: 19–30 V DC (ripple within supply tolerance)
- Power Dissipation / Consumption: ≤ 0.98 W
- Supply Connection: Terminals 9+/10− or Power Rail
- Input Connection (field side): Terminals 1, 2, 3, 4
- Supported RTDs: Pt10, Pt50, Pt100, Pt500, Pt1000 (EN 60751:1995); Pt10/Pt50/Pt100/Pt500/Pt1000 GOST 6651-94; Cu10, Cu50, Cu100 (P50353-92); Ni100 (DIN 43760)
- RTD Measuring Current: ≈ 200 μA
- Wiring: 2-, 3-, 4-wire connection; max lead resistance 50 Ω per line
- Supported Thermocouples: B, E, J, K, N, R, S, T (IEC 584-1:1995); L (DIN 43710:1985); TXK, TXKH, TXA (P8.585-2001)
- Cold-Junction Compensation: External and internal
- Potentiometer: 0–20 kΩ (2-wire), 0.8–20 kΩ (3-wire)
- Voltage Input: -100 to +100 mV, input resistance ≥ 1 MΩ
- Output: Terminals 5/6 source (±), 7/8 sink (±)
- Output Current: 0–20 mA or 4–20 mA
- Fault Signal (NAMUR NE43): Downscale 0 or 2 mA; upscale 21.5 mA
- Source Load: 0–550 Ω, open-circuit voltage ≤ 18 V
- Accuracy (after calibration): Pt100: ±(0.06 % of reading in K + 0.1 % of span + 0.1 K); Thermocouple: ±(0.05 % of reading in °C + 0.1 % of span + 1.5 K)
- Temperature Coefficient: Pt100: ±(0.0015 % of reading in K + 0.006 % of span)/K ΔTₐ; Thermocouple: ±(0.02 K + 0.005 % of reading in °C + 0.006 % of span)/K ΔTₐ
- Mounting: 12.7 mm (0.5 in) wide DIN-rail housing, 114 mm (4.49 in) height
- Terminals: Slip-off, screw-on, self-opening; wire up to 2.5 mm²
- Zone Rating: Intrinsically safe field side for Zone 0, 1, 2 / Div. 1, 2
Features
- Universal input — single device covers RTD, TC, potentiometer, and mV
- 2-/3-/4-wire RTD support with sensor breakage and short-circuit detection
- External and internal cold-junction compensation for thermocouples
- SIL 2 certified for functional safety instrumented systems
- Intrinsically safe field circuit (blue terminals 1–4) per DIN EN 60079-14
- NAMUR NE43 compliant fault signaling
- Programming socket for parameter configuration
- Compact 12.7 mm DIN-rail footprint
Applications
Temperature measurement and signal conditioning in hazardous areas (Zone 0, 1, 2 / Div. 1, 2) across oil & gas, petrochemical, pharmaceutical, and process industries where SIL 2 safety loops are required.
Installation & Notes
Mount on a 35 mm DIN rail. Connect the intrinsically safe field circuit to the blue terminals 1–4 using DIN EN 60079-14 compliant leads into the hazardous area. Connect the control-side output to terminals 5–8, and supply power to terminals 9–10 or via Power Rail. For external cold-junction compensation, fit the optional K-CJC-** terminal block. Observe the max 0.98 W power budget and ensure the load does not exceed 550 Ω on the source output. Configure input type and ranges via the programming socket before energizing.
