Serviceline Industrial Sensors
Serviceline Explosion Protection

Potentiometer Converter KFD2-PT2-Ex1-1

  • 1-channel isolated barrier
  • 24 V DC supply (Power Rail)
  • Potentiometer input
  • Voltage output 0 V ... 5 V
  • Lead resistance compensation adjustment
  • Accuracy 0.05 %
  • Up to SIL 2 acc. to IEC 61508

Please note: All product-related documents, such as certificates, declarations of conformity, etc., which were issued prior to the conversion under the name Pepperl+Fuchs GmbH, also apply to Pepperl+Fuchs AG.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  KFD2-PT2-Ex1-1

General specifications
Signal typeAnalog input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
ConnectionPower Rail or terminals 11+, 12-
Rated voltage20 ... 35 V DC
Ripplewithin the supply tolerance
Power dissipation0.5 W
Power consumption0.6 W
Connection sidefield side
Connectionterminals 4-, 5-, 3+, 2+, 1+
Types of measuring3-, 4-, 5-wire technology
Nominal resistance800 Ω to 100 kΩ
Supply voltageapprox. 4.7 V
Lead resistance5 % of the potentiometer resistance (adjustable)
Connection sidecontrol side
Connectionterminals 7-, 8+
Voltage output0 ... 5 V
Output resistancemax. 30 Ω
Transfer characteristics
Accuracy0.05 %
Linearity≤ ± 5 mV
Influence of ambient temperature≤ 0.5 mV/K
Rise time10 to 90 % ≤ 8 ms; 10 to 90 % within 1 % of span ≤ 25 ms
Galvanic isolation
Output/power supplyfunctional insulation, rated insulation voltage 50 V AC
Control elementspotentiometer
Configurationvia potentiometer
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2013 (industrial locations)
Electromagnetic compatibilityNE 21:2006
Degree of protectionIEC 60529:2001
Protection against electrical shockUL 61010-1
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 120 g
Dimensions20 x 107 x 115 mm (0.8 x 4.2 x 4.5 inch) , housing type B1
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificateBAS 00 ATEX 7171
MarkingEx-Hexagon II (1)G [Ex ia Ga] IIC , Ex-Hexagon II (1)D [Ex ia Da] IIIC , Ex-Hexagon I (M1) [Ex ia Ma] I (-20 °C ≤ Tamb ≤ 60 °C)
Voltage10.4 V DC
Current31.4 mA
Power82 mW
Maximum safe voltage250 V (Attention! The rated voltage can be lower.)
Maximum safe voltage250 V (Attention! The rated voltage can be lower.)
CertificateTÜV 02 ATEX 1797 X
MarkingEx-Hexagon II 3G Ex nA II T4
Galvanic isolation
Input/Outputsafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Input/power supplysafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
FM approval
Control drawing116-0129
UL approval
Control drawing116-0173 (cULus)
IECEx approval
IECEx certificateIECEx BAS 10.0060
IECEx BAS 10.0061X
IECEx marking[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Ex ec IIC T4 Gc
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see
Optional accessories- power feed module KFD2-EB2(.R4A.B)(.SP)
- universal power rail UPR-03(-M)(-S)
- profile rail K-DUCT-BU(-UPR-03)

Documents: KFD2-PT2-Ex1-1

ManualsLanguageFile TypeFile Size
Manual Isolated Barriers K-systemENGPDF760 KB
Manuel pour Barrières Isolées de Système KFRAPDF759 KB
Handbuch Trennbarrieren K-SystemGERPDF745 KB
Manual Isolated Barriers K-systemRUSPDF4107 KB
Instruction manuals
ИнструкцииBULPDF69 KB
Návod k poużitíCZEPDF61 KB
Instruktions manualDANPDF58 KB
Instruction manualENGPDF50 KB
KasutusjuhendESTPDF56 KB
KäyttöohjeFINPDF56 KB
Manuel d'instructionsFRAPDF97 KB
BetriebsanleitungGERPDF62 KB
Οδηγίες χρήσηςGREPDF73 KB
HandleidingHOLPDF72 KB
Instruction manual / BetriebsanleitungHRVPDF70 KB
Használati útmutatóHUNPDF71 KB
Manuale di istruzioniITAPDF93 KB
Lietošanas pamācībaLAVPDF68 KB
Instrukciju vadovasLITPDF68 KB
Instrukcja obsługiPOLPDF72 KB
Manual de instruçõesPORPDF72 KB
Manual de utilizareRONPDF71 KB
Návod na poużitieSLKPDF130 KB
Manual de instruccionesSPAPDF95 KB

Approvals+Certificates: KFD2-PT2-Ex1-1

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0055BPDF144 KB
Australia Test SafeANZEx 17.3006XPDF6788 KB
Baseefa IECEx Certificate of ConformityIECEx BAS 10.0060LINK---
Baseefa Type n IECEx Certificate of ConformityIECEx BAS 10.0061XLINK---
Belarus Pattern ApprovalNr. 11709PDF15640 KB
Canada UL cULE106378 cUL (QUZW7)LINK---
EAC EAC TP TC 020/2011TC RU C-DE.MH04.B.00397PDF680 KB
Europe Baseefa II (1) D ATEX Category (M1) ATEX Category (1) D ATEX Category (1) GBAS 00 ATEX 7171PDF3144 KB
Europe TUV Nord ATEX Category 3 GTÜV 02 ATEX 1797XPDF1285 KB
India PESO (India) CCOEA/P/HQ/KA/104/5729(P460628)PDF501 KB
Japan TIISTC 16186PDF497 KB
Pepperl+Fuchs Functional Safety AssessmentFS-0058PF-20APDF81 KB
Russia Belarus Kazakhstan EAC EAC TP TC 012/2011EAEC RU C-DE.EX01.B.00102/19PDF9815 KB
Russia VNIIMS Pattern ApprovalOC.C.34.004.A No.56757PDF6680 KB
USA FMFM Listed (Approval Guide)LINK---
Control drawings
Control Drawing FM / Control Drawing FM   PDF58 KB
Control Drawing UL / Control Drawing UL   PDF1092 KB

Function: KFD2-PT2-Ex1-1

This isolated barrier is used for intrinsic safety applications. It provides the source voltage to a potentiometer and transfers its wiper position from hazardous areas to safe areas. It then converts the signal to a 0 V ... 5 V voltage output (consistant with 0 mA ... 20mA current output, see for example KFD2-PT2-Ex1-4).

The unit can be used in a 3-, 4-, or 5-wire configuration depending on the required measurement accuracy. Terminals 2 and 5 are used as the sense line for the potentiometer lead resistance compensation in a 5-wire configuration.

The barrier’s potentiometer can be used to compensate for lead resistance up to 5 % of the hazardous area potentiometer value.