Serviceline Industrial Sensors
Phone: 330-486-0001
Fax: 330-405-4710
Serviceline Explosion Protection
Phone: 330-486-0002
Fax: 330-963-5827

Repeater KFD0-CS-Ex1.54-Y2

  • 1-channel isolated barrier
  • 24 V DC supply (loop powered)
  • SMART fire alarm input
  • Current input 1 mA ... 20 mA

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  KFD0-CS-Ex1.54-Y2

General specifications
Signal typeAnalog input
Rated voltage0 ... 24 V DC , loop powered
Power dissipation0.2 W
Control circuit
Connectionterminals 11+, 12-
Current0 ... 20 mA
Transmission rangecurrent: 1 ... 20 mA
voltage: 0 ... 24 V
Field circuit
Connectionterminals 1+, 2-
Short-circuit current≤ 43 mA
Transfer characteristics
After calibration≤ 3.5 mA current loss at 20 mA load current
Influence of ambient temperature± 20 µA / K
Rise time/fall time≤ 50 µs (load current ≥ 1 mA)
Galvanic isolation
Input/Outputsafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Labelingspace for labeling at the front
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. 100 g
Dimensions20 x 107 x 115 mm (0.8 x 4.2 x 4.5 inch) (W x H x D) , housing type B1
Height107 mm
Width20 mm
Depth115 mm
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 7087
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
Voltage25.2 V
Current43 mA
Power271 mW
Maximum safe voltage250 V (Attention! The rated voltage can be lower.)
CertificateTÜV 99 ATEX 1499 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
Directive conformity
Directive 2014/34/EUEN IEC 60079-0:2018+AC:2020 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
FM approval
Control drawing116-0129 (cFMus)
UL approvalE106378
Control drawing116-0348 (cULus)
IECEx approval
IECEx certificateIECEx BAS 08.0079
IECEx BAS 10.0007X
IECEx marking[Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I
Ex nA IIC T4 Gc
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 13.027210123
ECLASS 12.027210120
ECLASS 11.027210120
ECLASS 10.0.127210120
ECLASS 9.027210120
ECLASS 8.027210120
ECLASS 5.127210120
ETIM 9.0EC002653
ETIM 8.0EC002653
ETIM 7.0EC002653
ETIM 6.0EC002653
ETIM 5.0EC001485
UNSPSC 12.132101514

Details: KFD0-CS-Ex1.54-Y2


This isolated barrier is used for intrinsic safety applications. It provides control and signal transfer for SMART compatible fire and smoke alarm transmitters inside hazardous areas.

The typical application for the barrier is connection of a fire detector loop to a control panel through a System Sensor® translator device (typically an IST200).

The fall time of the digital signal must be less than 50 s, the current in the hazardous area must be bigger than 1 mA.

Since this isolator is loop-powered, use the technical data to verify that proper voltage is available to the field devices.

Informative Literature: KFD0-CS-Ex1.54-Y2

Language Selection:
LiteratureLanguageFile TypeFile Size
Application Report - Energy Generation in Wastwater Treatment PlantsENGPDF532 KB
Application Report - Generating Electricity in Coal-Fired Power PlantsENGPDF412 KB
Application Report - Screening Systems in Sewage Treatment PlantsENGPDF577 KB
Application Report - Sicherer Brennstofftransport in KohlekraftwerkenENGPDF391 KB
Application Report - Water Inlet in Wastewater Treatment PlantsENGPDF526 KB

Product Documentation: KFD0-CS-Ex1.54-Y2

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF172 KB
Functional Safety ManualENGPDF462 KB
ManualENGPDF3685 KB

Design / Simulation: KFD0-CS-Ex1.54-Y2

Language Selection:
CADLanguageFile TypeFile Size
CAD Portal / CAD PortalALLLINK---

Approvals: KFD0-CS-Ex1.54-Y2

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Baseefa IECEx Certificate of ConformityIECEx BAS 08.0079ALLLINK---
Baseefa Type n IECEx Certificate of ConformityIECEx BAS 10.0007XALLLINK---
Brasil TUV RheinlandTÜV 15.0794ALLPDF1206 KB
Canada FMFM18CA0107XALLPDF322 KB
Canada UL cULE106378 cUL (QUZW7)ALLLINK---
Canada UL cULE106378 cUL (QVAJ7)ALLLINK---
China SITIIAS CCC Ex Certificate2021322316004085 (Singapore)ALLPDF1937 KB
Europe Baseefa ATEX Category (1) GDBAS 00 ATEX 7087ALLPDF346 KB
Ukraine SERTIS ExSC 21.0646 XALLPDF12351 KB
United Kingdom Baseefa UKEX Category (1) D UKEX Category (1) G UKEX Category (M1)BAS21UKEX0426ALLPDF334 KB
Control Drawings
Control drawing CSA / Control drawing CSA   ALLPDF56 KB
Control drawing FM / Control drawing FM   ALLPDF58 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-0035EALLPDF82 KB

Associated Products: KFD0-CS-Ex1.54-Y2

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