Serviceline Industrial Sensors
Serviceline Explosion Protection

SMART Transmitter Power Supply KFD2-STC5-Ex1.H

  • 1-channel isolated barrier
  • 24 V DC supply (Power Rail)
  • Input 2-wire and 3-wire SMART transmitters and 2-wire SMART current sources
  • Output 4 mA ... 20 mA current sink/current source
  • Terminals with test points
  • High field voltage 17 V DC
  • SIL 2 (SC 3) acc. to IEC/EN 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 or Pepperl+Fuchs AG, also apply to Pepperl+Fuchs SE.

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of  KFD2-STC5-Ex1.H

General specifications
Signal typeAnalog input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
Systematic capability (SC)SC 3
ConnectionPower Rail or terminals 14+, 15-
Rated voltage18 ... 30 V DC
Ripplewithin the supply tolerance
Power dissipation≤ 1 W at maximum load
Power consumption≤ 1.6 W at maximum load
Connection sidefield side
Connectionterminals 1+, 2-, 3
Input signal4 ... 20 mA
Open circuit voltage/short-circuit currentterminals 1+, 3: 24 V / 25 mA
Input resistancemax. 265 Ω terminals 2-, 3 , max. 330 Ω terminals 1+, 3
Available voltage≥ 17 V at 20 mA ; ≥ 21 V at 4 mA , terminals 1+, 3
Connection sidecontrol side
Connectionterminals 7+, 8-, 9- (sink)
terminals 7-, 8+, 9+ (source)
see additional information
Load0 ... 800 Ω
Output signal4 ... 20 mA (overload > 25 mA)
Ripplemax. 50 µA rms
External supply (loop)2 ... 30 V DC
If the external voltage is > 19 V, a load ≥ ((V - 19) / 0.02) Ω is required. V represents the value of the external voltage.
The internal 250 Ω resistor at terminal 9 can be used as a load.
Transfer characteristics
Deviationat 20 °C (68 °F), 4 ... 20 mA
≤ 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage
Influence of ambient temperature≤ 0.25 µA/K
Frequency rangefield side into the control side: bandwidth with 0.5 Vpp signal 0 ... 7.5 kHz (-3 dB)
control side into the field side: bandwidth with 0.5 Vpp signal 0.3 ... 7.5 kHz (-3 dB)
Settling time200 µs
Rise time/fall time100 µs
Galvanic isolation
Output/power supplyfunctional insulation, rated insulation voltage 50 V AC
Display elementsLED
Labelingspace for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2013 (industrial locations)
Electromagnetic compatibilityNE 21:2012
EN 61326-3-2:2008
Degree of protectionIEC 60529:2001
Protection against electrical shockUL 61010-1:2012
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
extended ambient temperature range up to 70 °C (158 °F), refer to manual for necessary mounting conditions
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 200 g
Dimensions20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) (W x H x D) , housing type B2
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificateCML 17 ATEX 2029X
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
Input[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Maximum safe voltage250 V (Attention! The rated voltage can be lower.)
Equipmentterminals 1+, 3-
Voltage27.2 V
Current93 mA
Power633 mW
Internal capacitance12 nF
Internal inductance0 mH
Equipmentterminals 2-, 3
Voltage30 V
Current115 mA
Power1 mW
Voltage2 V
Current8.5 mA
Power1.1 mW
Equipmentterminals 1+, 2 / 3-
Voltage27.2 V
Current115 mA
Power784 mW
Internal capacitance12 nF
Internal inductance0 mH
Maximum safe voltage250 V (Attention! The rated voltage can be lower.)
CertificateCML 17 ATEX 3028X
MarkingEx-Hexagon II 3G Ex ec IIC T4 Gc
Galvanic isolation
Input/Outputsafe electrical isolation acc. to IEC/EN 60079-11:2007, voltage peak value 375 V
Input/power supplysafe electrical isolation acc. to IEC/EN 60079-11:2007, voltage peak value 375 V
Directive conformity
Directive 2014/34/EUEN IEC 60079-0:2018 , EN 60079-7:2015+A1:2018 , EN 60079-11:2012
International approvals
UL approvalE106378
Control drawing116-0439 (cULus)
IECEx approval
IECEx certificateIECEx CML 17.0015X
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


ECLASS 11.027210119
ECLASS 10.0.127210119
ECLASS 9.027210119
ECLASS 8.027210119
ECLASS 5.127210119
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.132101514

Details: KFD2-STC5-Ex1.H


This isolated barrier is used for intrinsic safety applications.

The device supplies 2-wire and 3-wire SMART transmitters, and can also be used with 2-wire SMART current sources.

It transfers the analog input signal to the safe area as an isolated current value.

Digital signals may be superimposed on the input signal in the hazardous or non-hazardous area and are transferred bi-directionally.

The device provides a sink mode or a source mode output on the safe area terminals.

The device has an internal resistor. Use this resistor if the HART communication resistance in the control circuit is too low.

Test sockets for the connection of HART communicators are integrated into the terminals of the device.

Product Documentation: KFD2-STC5-Ex1.H

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF168 KB
Functional Safety ManualENGPDF2024 KB
System Manual ENGPDF3673 KB

Design / Simulation: KFD2-STC5-Ex1.H

Language Selection:
CADLanguageFile TypeFile Size
3-D model / 3-D-ModellALLSTP3048 KB
CAD Portal / CAD PortalALLLINK---
CAE EPLAN Data Portal / CAE EPLAN Data PortalALLLINK---
EPLAN macro P+F.KFD2-STC5-Ex1.H / EPLAN-Makro P+F.KFD2-STC5-Ex1.HALLEDZ1380 KB

Approvals: KFD2-STC5-Ex1.H

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Australia New Zealand SIMTARS Group IANZEx 21.2003XALLPDF338 KB
Brasil TUV Rheinland BrazilTÜV 19.0463XALLPDF1373 KB
China SITIIAS CCC Ex Certificate2020322316001403 (Singapore)ALLPDF2012 KB
Europe CML ATEX Category 3 GCML 17ATEX3028XALLPDF125 KB
Europe CML I (M1) II (1) D ATEX II (1) GCML 17ATEX2029XALLPDF237 KB
IECEx Certificate of ConformityIECEx CML 17.0015XALLLINK---
India PESO (India) CCOEA/P/HQ/KA/104/5969 (P546382)ALLPDF83 KB
Japan CML II (1) D II 3 G II (1) GCML 18JPN2185XALLPDF454 KB
USA Canada UL Hazardous Location Certificate of Compliance cULus UL E106378CoC E106378 RepRef E106378-20171103ALLPDF413 KB
United Kingdom CML UK-Type Examination Certificate UKEX Category (1) D UKEX Category (1) G UKEX Category (M1)CML 21UKEX2406XALLPDF269 KB
Control Drawings
/116/1160439a.pdf   ALLPDF37 KB
Declaration of Conformity
EU-Declaration of conformity / EU-KonformitätserklärungDOC-3529BALLPDF82 KB
UK-Declaration of conformity / UK-KonformitätserklärungDOC-5675ALLPDF73 KB

Associated Products: KFD2-STC5-Ex1.H

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