Serviceline Industrial Sensors
Serviceline Explosion Protection

Relay Module KFD0-RO-Ex2

  • 2-channel isolated barrier
  • 24 V DC supply (loop powered)
  • Logic input 15 V DC ... 30 V DC, non-polarized
  • Relay contact output
  • Up to SIL 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  KFD0-RO-Ex2

General specifications
Signal typeDigital Output
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Rated voltageloop powered
Power dissipation0.8 W
Connection sidecontrol side
Connectionterminals 7, 8, 9
Input voltage15 ... 30 V DC
Input current≤ 21 mA per channel
Safety noteAttention! Combination of output Ex i with output not Ex i is not permitted.
If load voltage > 50 V, de-energize before removing the terminals.
Connection sidefield side
Connectionterminals 1, 2, 3; 4, 5, 6
Contact loading230 V AC/2 A/cos φ > 0.7; 40 V DC/2 A resistive load
Energized/De-energized delayapprox. 10 ms / approx. 5 ms
Mechanical life5 x 106 switching cycles
Transfer characteristics
Switching frequency< 10 Hz
Galvanic isolation
Input/Outputreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/Outputbasic insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Display elementsLEDs
Labelingspace for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EUEN 61326-1:2013 (industrial locations)
Low voltage
Directive 2014/35/EUEN 61010-1:2010
Electromagnetic compatibilityNE 21:2006
Degree of protectionIEC 60529:2001
Ambient conditions
Ambient temperature-20 ... 65 °C (-4 ... 149 °F)
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 100 g
Dimensions20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) , 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 certificateDMT 00 ATEX E 016
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
OutputEx ia
Voltage60 V
Current2 A
Maximum safe voltage40 V DC (Attention! Um is no rated voltage.)
Contact loading50 V AC/2 A ; 40 V DC/2 A (TÜV 00 ATEX 1621 X)
CertificateTÜV 00 ATEX 1621 X
MarkingEx-Hexagon II 3G Ex nA nC IIC T4
Galvanic isolation
Input/Outputsafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Output/Outputsafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 60 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 drawing116-0261
CSA approval
Control drawing116-0156
IECEx approvalIECEx BVS 10.0025
Approved for[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 11.027210101
ECLASS 10.0.127210101
ECLASS 9.027210101
ECLASS 8.027210101
ECLASS 5.127210121
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.139121543

Documents: KFD0-RO-Ex2

ManualsLanguageFile TypeFile Size
Functional Safety ManualENGPDF415 KB
System Manual ENGPDF3524 KB
SystemhandbuchGERPDF3557 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-RO-Ex2

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0043DPDF55 KB
Australia Test SafeANZEx 17.3006XPDF6788 KB
Canada CSACoC 1029981 CPDF201 KB
EAC Pepperl+Fuchs EAC TP TC 020/2011EAEC N RU D-DE.PA01.B.95500/21PDF748 KB
Europe DEKRA EXAM ATEX Category (1) D ATEX Category (1) G ATEX Category (M1)DMT 00 ATEX E 016PDF1514 KB
Europe TUV Nord ATEX Category 3 GTÜV 00 ATEX 1621XPDF745 KB
India PESO (India) CCOEA/P/HQ/KA/104/5570 (P416551)PDF976 KB
Pepperl+Fuchs Functional Safety AssessmentFS-0014PF-20APDF100 KB
Russia Belarus Kazakhstan EAC EAC TP TC 012/2011EAEC RU C-DE.EX01.B.00102/19PDF9815 KB
South Africa MASCMASC MS/17-0866PDF213 KB
USA FMCoC 3011512PDF62 KB
Ukraine SERTIS ExSC 21.0646 XPDF12351 KB
United Kingdom UKEX Category (1) G UK-Type Examination Certificate UKEX Category (M1) UKEX Category (1) DCML 21UKEX2938PDF142 KB
Worldwide DEKRA EXAM IECEx Certificate of ConformityIECEx BVS 10.0025LINK---
Control drawings
Control Drawing CSA / Control Drawing CSA   PDF66 KB
Control Drawing FM / Control Drawing FM   PDF114 KB

Function: KFD0-RO-Ex2

This isolated barrier is used for intrinsic safety applications.

The device switches intrinsically safe circuits on the field side. Typical applications for the use of the device are remote reset, fire alarm testing or remote calibration of strain gauges.

The outputs are galvanically isolated to the inputs. The inputs are not polarized and share a common reference potential.

Each input of the device is protected by a fuse and an electronic current limiting.