+971-50-4352306 – Due to unforeseen circumstances please use this temporary phone number for all enquiries - +971-50-4352306


KFD2UT2EX1 / 248764

Images are for illustrative purposes only

Manufacturer: Pepperl + Fuchs

3 in stock

9 in UK stock

Please contact us to arrange import from UK

Why not check out our related items!
  • Information
  • Specification
  • Related
  • Delivery
  • Alternatives


  • 1-channel isolated barrier
  • 24 V DC supply (Power Rail)
  • TC, RTD, potentiometer or voltage input
  • Current output 0/4 mA ... 20 mA
  • Sink or source mode
  • Configurable by PACTwareTM
  • Line fault (LFD) and sensor burnout detection
  • Up to SIL2 acc. to IEC 61508


This isolated barrier is used for intrinsic safety applications. It is designed to connect RTDs, thermocouples, or potentiometers in the hazardous area, and provide a proportional 0/4 mA ... 20 mA signal to the safe area.

The barrier offers 3-port isolation between input, output, and power supply.

A removable terminal block K-CJC-** is available for thermocouples when internal cold junction compensation is desired.

A fault is indicated by a red flashing LED per NAMUR NE44 and user-configured fault outputs.

The unit is easily programmed with the PACTwareTM configuration software.

A collective error messaging feature is available when used with the Power Rail system.

General specifications
Signal type Analog input
Connection terminals 14+, 15- or power feed module/Power Rail
Rated voltage 20 ... 30 V DC
Ripple within the supply tolerance
Power loss/power consumption ≤ 0.95 W / 0.95 W
Connection terminals 1, 2, 3, 4
  • type Pt10, Pt50, Pt100, Pt500, Pt1000 (EN 60751: 1995)
  • type Pt10GOST, Pt50GOST, Pt100GOST, Pt500GOST, Pt1000GOST (6651-94)
  • type Cu10, Cu50, Cu100 (P50353-92)
  • type Ni100 (DIN 43760)
Measuring current approx. 200 µA with RTD
Types of measuring 2-, 3-, 4-wire connection
Lead resistance ≤ 50 Ω per lead
Measuring circuit monitoring sensor burnout, sensor short-circuit
  • type B, E, J, K, N, R, S, T (IEC 584-1: 1995)
  • type L (DIN 43710: 1985)
  • type TXK, TXKH, TXA (P8.585-2001)
Cold junction compensation external and internal
Measuring circuit monitoring sensor burnout
Voltage selectable within the range -100 ... 100 mV
Potentiometer 0 ... 20 kΩ (2-wire connection), 0.8 ... 20 kΩ (3-wire connection)
Input resistance ≥ 1 MΩ (-100 ... 100 mV)
Connection output I: terminal 7: source (-), sink (+), terminal 8: source (+), terminal 9: sink(-)
Output Analog current output
Current range 0 ... 20 mA or 4 ... 20 mA
Fault signal downscale 0 or 2 mA, upscale 21.5 mA (acc. NAMUR NE43)
l downscale 0 or 2 mA, upscale 21.5 mA (acc. NAMUR NE43) Source
  • load 0 ... 550 Ω
  • open-circuit voltage ≤ 18 V
Sink Voltage across terminals 5 ... 30 V. If the current is supplied from a source > 16.5 V, series resistance of ≥ (V - 16.5)/0.0215 Ω is needed, where V is the source voltage.
The maximum value of the resistance is (V - 5)/0.0215 Ω.
Transfer characteristics
After calibration
  • Pt100: ± (0.06 % of measurement value in K + 0.1 % of span + 0.1 K (4-wire connection))
  • thermocouple: ± (0.05 % of measurement value in °C + 0.1 % of span + 1 K (1.2 K for types R and S)) this includes ± 0.8 K error of the cold junction compensation
  • mV: ± (50 µV + 0.1 % of span)
  • potentiometer: ± (0.05 % of full scale + 0.1 % of span, (excludes errors due to lead resistance))
Influence of ambient temperature deviation of CJC included:
  • Pt100: ± (0.0015 % of measurement value in K + 0.006 % of span)/K ?Tamb*
  • thermocouple: ± (0.02 K + 0.005 % of measurement value in °C + 0.006 % of span)/K ?Tamb*
  • mV: ± (0.01 % of measurement value + 0.006 % of span)/K ?Tamb*
  • potentiometer: ± 0.006 % of span/K ?Tamb*
*?Tamb = ambient temperature change referenced to 23 °C (296 K)
Influence of supply voltage < 0.01 % of span
Influence of load ≤ 0.001 % of output value per 100 Ω
Reaction time sensor burnout and sensor short circuit selected where appropriate mV: 1 s, thermocouples with CJC: 1.1 s, thermocouples with fixed reference temperature: 1.1 s, 3- or 4-wire RTD: 920 ms, 2-wire RTD: 800 ms, Potentiometer: 2.05 s
Electrical isolation
Output/supply, programming input functional insulation acc. to IEC 62103, rated insulation voltage 50 Veff
There is no electrical isolation between the programming input and the supply.
The programming cable (see section accessories and installation) provides galvanic isolation so that ground loops are avoided.
Directive conformity
Electromagnetic compatibility
Directive 2004/108/EC EN 61326-1:2006
Insulation coordination UL 61010-1
Electromagnetic compatibility NE 21:2006
Protection degree IEC 60529
Ambient conditions
Ambient temperature -20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Protection degree IP20
Mass approx. 130 g
Dimensions 20 x 119 x 115 mm (0.8 x 4.7 x 4.5 in) , housing type B2
Data for application in connection with Ex-areas
EC-Type Examination Certificate CESI 04 ATEX 143 , for additional certificates see www.pepperl-fuchs.com
Group, category, type of protection Ex II (1)GD, I (M1), [Ex ia] IIC, [Ex iaD], [Ex ia] I (-20 °C ≤ Tamb = 60 °C) [circuit(s) in zone 0/1/2]
Input Ex ia IIC
Inputs terminals 1, 2, 3, 4
Voltage Uo 9v
Current Io 22mA
Power Po 50mW
Analog outputs, power supply, collective error
Maximum safe voltage Um 250 V (Attention! This is not the rated voltage.)
Maximum safe voltage Um 250 V (Attention! The rated voltage is lower.), RS 232
Statement of conformity
Group, category, type of protection, temperature class Ex II 3G Ex nA II T4 [device in zone 2]
Electrical isolation
Input/Other circuits safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
Directive 94/9/EC EN 60079-0:2006, EN 60079-11:2007, EN 60079-15:2005, EN 60079-26:2007, EN 61241-0:2006, EN 61241-11:2006
International approvals
UL approval
Control drawing 116-0316
CSA approval
Control drawing 366-024CS-12 (cCSAus)
IECEx approval IECEx TUN 07.0003
Approved for [Zone 0] [Ex ia] IIC, [Ex iaD], [Ex ia] I
General information
Supplementary information EC-Type Examination Certificate, Statement of Conformity, Declaration of Conformity, Attestation of Conformity and instructions have to be observed where applicable. For information see www.pepperlfuchs.com

Distributed by Kempston Controls LLC

Kempston Controls LLC a UK specialist technical distributor of fuses, sensors and control equipment. If you would like to discuss any of the parts which you see on our online store, please contact our dedicated UK sales centre on +44 (01933) 411411.

More about Kempstons

KFD2-UT2-EX1 : KFD2UT2EX1 Specification

Alternative Part Number: 248764

Manufacturer: Pepperl + Fuchs

Pricing Unit: Each

Weight: 0.300 kg (each)

Tariff code: 85365080

Generic code: PFPA10

PDF Product Datasheet for KFD2-UT2-EX1

Due to the current situation caused by COVID-19, Kempston Controls & UPS can no longer guarantee all timed deliveries and therefore will not be able to refund any timed which are delivered late

All shipping options below are for UK shipping only. Delivery prices below are Exc VAT.

Web Promo Carriage UK standard delivery, usually 1 - 2 days (1 per day, minimum order AED 20.00) AED 0.00
Standard 1-2 Days UK standard delivery, usually within 1 - 2 days AED 7.95
Next Day* Next Day service* AED 7.95
Express* Express delivery by 2pm* AED 18.00
Saturday** Saturday by 2pm service** AED 35.00
Collect Collection is available from our site - please call if your order is urgent AED 0.00

Greyed out shipping options indicate services not available, as the certain criteria has not been met. (i.e. it’s after the cut off time or items in your basket are not in stock for Next Day, Express or Saturday delivery)

* Delivery services are subject to exception areas, click exceptions to view the affected areas or use the ‘shipping estimator’ tool to view delivery options.

International Priority to United Arab Emirates from AED 277.51 Shipping options to United Arab Emirates
(Terms DAP to Delivery Address) Standard shipping for items from the UK is via Fedex, if you prefer to collect using your own courier, then we can also arrange that at no extra cost.

Our technical team can help find an alternative! Fill in the below to get started.

What our Customers are saying

Continue shopping View basket
Need help? Talk live to a sales representative!
Live Chat

Help us better your experience! Let us know what country you are in.