Serviceline Industrial Sensors
Serviceline Explosion Protection

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 voltageloop 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≤ 65 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) , 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 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 (-20 °C ≤ Tamb ≤ 60 °C)
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 [device in zone 2]
Galvanic isolation
Input/Outputsafe 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 (cFMus)
UL approval
Control drawing116-0348 (cULus)
IECEx approvalIECEx BAS 08.0079 IECEx BAS 10.0007X
Approved for[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Ex nA II T4 Gc
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see

Documents: KFD0-CS-Ex1.54-Y2

ManualsLanguageFile TypeFile Size
Functional Safety ManualENGPDF462 KB
Manual Isolated Barriers K-systemENGPDF760 KB
Manuel pour Barrières Isolées de Système KFRAPDF759 KB
Handbuch Funktionale SicherheitGERPDF465 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: KFD0-CS-Ex1.54-Y2

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0035CPDF65 KB
Baseefa IECEx Certificate of ConformityIECEx BAS 08.0079LINK---
Baseefa Type n IECEx Certificate of ConformityIECEx BAS 10.0007XLINK---
Brasil TUV RheinlandTÜV 15.0794PDF1291 KB
Canada FMCoC 3036564cPDF322 KB
Canada UL cULE106378 cUL (QVAJ7)LINK---
Canada UL cULE106378 cUL (QUZW7)LINK---
Europe Baseefa ATEX Category (1) GDBAS 00 ATEX 7087PDF801 KB
USA FMFM Listed (Approval Guide)LINK---
Control drawings
Control Drawing FM / Control Drawing FM   PDF58 KB
Control Drawing UL / Control Drawing UL   PDF56 KB

Function: 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.