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

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 contact the Serviceline for exact delivery estimation
279.00 USD
Netlist price. Your individual price will be calculated during checkout.
Unit Price 


Free Shipping

Purchase on Account

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 voltage15 ... 30 V DC , loop 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) (W x H x D) , housing type B2
Height119 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 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 IEC 60079-0:2018+AC:2020 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
FM approval
Control drawing116-0261
CSA approval
Control drawing116-0156
IECEx approval
IECEx certificateIECEx BVS 10.0025
IECEx marking[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 13.027210101
ECLASS 12.027210101
ECLASS 11.027210101
ECLASS 10.0.127210101
ECLASS 9.027210101
ECLASS 8.027210101
ECLASS 5.127210121
ETIM 9.0EC001485
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.139121543

Details: 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.

Informative Literature: KFD0-RO-Ex2

Language Selection:
LiteratureLanguageFile TypeFile Size
Application Report - Biological Cleaning of Wastwater and Secondary Sedimentation StageENGPDF566 KB
Application Report - Energy Generation in Wastwater Treatment PlantsENGPDF532 KB
Application Report - Generating Electricity in Coal-Fired Power PlantsENGPDF412 KB
Application Report - Sand Trap and Preliminary Sedimentation StageENGPDF448 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-RO-Ex2

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF169 KB
Functional Safety ManualENGPDF415 KB
ManualENGPDF3685 KB

Design / Simulation: KFD0-RO-Ex2

Language Selection:
CADLanguageFile TypeFile Size
CAD Portal / CAD PortalALLLINK---
CAE EPLAN Data Portal / CAE EPLAN Data PortalALLLINK---

Approvals: KFD0-RO-Ex2

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Australia Test SafeANZEx 17.3006XALLPDF6788 KB
Canada CSACoC 1029981 CALLPDF177 KB
Europe DEKRA EXAM ATEX Category (1) D ATEX Category (1) G ATEX Category (M1)DMT 00 ATEX E 016ALLPDF1514 KB
Europe TUV Nord ATEX Category 3 GTÜV 00 ATEX 1621XALLPDF745 KB
Pepperl+Fuchs Functional Safety AssessmentFS-0014PF-20AALLPDF100 KB
SITIIAS CCC Ex Certificate2021322316003755 (Singapore)ALLPDF1036 KB
South Africa MASCMASC MS/17-0866ALLPDF213 KB
Ukraine SERTIS ExSC 21.0646 XALLPDF12351 KB
United Kingdom UKEX Category (1) G UK-Type Examination Certificate UKEX Category (M1) UKEX Category (1) DCML 21UKEX2938ALLPDF142 KB
Worldwide DEKRA EXAM IECEx Certificate of ConformityIECEx BVS 10.0025ALLLINK---
Control Drawings
Control drawing FM / Control drawing FM   ALLPDF114 KB
Control drawing CSA / Control drawing CSA   ALLPDF66 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)DOC-0043EALLPDF82 KB
UKCA-Declaration of conformity / UKCA-KonformitätserklärungDOC-5682ALLPDF81 KB

Associated Products: KFD0-RO-Ex2

Matching System Components
Cable trunking is integrated in the mounting profile, Safe spacious separation of safe and hazardous signals, No additional cable guides necessary, Standard length 1.8 m (5.8 ft), simple to customize to application space, With mounting aidspa
3-pin screw terminal, For KF modules of K-System, Packaging unit: 5 pieces greenpa
Coding of K-System terminal blocks, Coding of LB/FB-System front sockets, Packaging unit: 20 x 6 coding pinspa
Safety Products Selector

Choose from various selection criteria like safety integrity level, performance level, device function, and signal type and find the SIL/PL assessed device that you are looking for.