Serviceline Industrial Sensors
Serviceline Explosion Protection

Relay Module KFD0-RSH-1.4S.PS2

  • 1-channel signal conditioner
  • 24 V DC supply (loop powered)
  • Logic input 20 V DC ... 26.5 V DC, non-polarized
  • Fail-safe relay contact output for de-energized and energized to safe function
  • Test pulse immunity
  • Up to SIL 3 acc. to IEC 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-RSH-1.4S.PS2

General specifications
Signal typeDigital Output
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Rated voltageloop powered
Power dissipation< 1.5 W
Power consumption< 1.5 W
Connection sidecontrol side
ConnectionInput terminals 7, 8 ; test input terminals 10, 11, 12
Pulse/Pause ratiomin. 20 ms / min. 20 ms
Test inputsee functional safety manual
Signal level0-signal: -3 ... 3 V DC
1-signal: 20 ... 26.5 V
Rated current45 ... 50 mA
Connection sidefield side
Connectionoutput I (ETS): terminals 2, 3
output II (DTS): terminals 4, 5, 6
output I and II (DPS): terminals 2, 3, 4, 5, 6
Contact loading253 V AC/5 A/cos φ 0.7; 30 V DC/5 A resistive load
Minimum switch current2 mA / 24 V DC
Energized/De-energized delayapprox. 10 ms / approx. 5 ms
Mechanical life5 x 106 switching cycles
Fuse rating2.5 A (max. 5 A)
recommended maximum utilization of the fuse: 80 %
Transfer characteristics
Switching frequency< 10 Hz
Galvanic isolation
Input/Outputreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/Outputreinforced 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 21:2012
Degree of protectionIEC 60529:2013
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Observe the temperature range limited by derating, see section derating.
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
CertificatePF 15 CERT 3844 X
MarkingEx-Hexagon II 3G Ex nA nC IIC T4 Gc [device in zone 2]
Contact loading50 V AC/4 A; 30 V DC/4 A , see derating curves for Zone 2
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013, EN 60079-15:2010
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

Documents: KFD0-RSH-1.4S.PS2

ManualsLanguageFile TypeFile Size
Functional Safety ManualENGPDF598 KB
System Manual ENGPDF3489 KB
SystemhandbuchGERPDF3506 KB
Instruction manuals
Návod k poużitíCZEPDF0 KB
Instruktions manualDANPDF168 KB
Instruction manualENGPDF48 KB
KasutusjuhendESTPDF165 KB
KäyttöohjeFINPDF165 KB
Manuel d'instructionsFRAPDF56 KB
BetriebsanleitungGERPDF50 KB
Οδηγίες χρήσηςGREPDF177 KB
HandleidingHOLPDF169 KB
Instruction manual / BetriebsanleitungHRVPDF0 KB
Manuale di istruzioniITAPDF55 KB
Lietošanas pamācībaLAVPDF168 KB
Instrukciju vadovasLITPDF168 KB
Instrukcja obsługiPOLPDF171 KB
Manual de instruçõesPORPDF169 KB
Manual de utilizareRONPDF169 KB
Návod na poużitieSLKPDF168 KB
Navodila za uporaboSLVPDF167 KB
Manual de instruccionesSPAPDF55 KB
ManualSWEPDF167 KB


CADFile TypeFile Size
3-D model / 3-D-ModellSTP2510 KB
CAD Portal / CAD PortalLINK---

Approvals+Certificates: KFD0-RSH-1.4S.PS2

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0976DPDF76 KB
UKCA-Declaration of conformity / UKCA-KonformitätserklärungDOC-5305PDF67 KB
EAC Pepperl+Fuchs EAC TP TC 020/2011EAEC N RU D-DE.PA01.B.95500/21PDF748 KB
Europe Pepperl+Fuchs ATEX Category 3 G Certificate of CompliancePF15CERT3844 XPDF198 KB
exida Functional Safety AssessmentP+F 1003-97R1- R017 V1R0PDF356 KB
exida Functional Safety CertificateP+F 100397R1C P0006 C04PDF169 KB

Associated Products: KFD0-RSH-1.4S.PS2

Coding of K-System terminal blocks, Coding of LB/FB-System front sockets, Packaging unit: 20 x 6 coding pinspa

Function: KFD0-RSH-1.4S.PS2

This signal conditioner is a relay module that is suitable for safely switching applications of a load circuit. The device isolates load circuits up to 230 V and the 24 V control interface.

The energized to safe (ETS) function is permitted for SIL3 applications with output I. The de-energized to safe (DTS) function is permitted for SIL3 applications with output II. Additionally a dual pole switching (DPS) is possible by combination of output I and II.

The relays are of diverse design, but have a common effect on the individual switch output. For checking of these relays, terminals 10, 11 and 12 can be used. The test mode will be indicated by LEDs according to NAMUR NE44.

The outputs are galvanically isolated from the input. Output II is protected against contact welding by a fuse depending on the used terminal.

K-System Safety Relays

Pepperl+Fuchs is setting a new level of reliability with newly developed safety relays. With multi-redundant switching contacts, the interface module from the tried-and-tested K-System provides reliable and safety-related activation and deactivation for applications in accordance with IEC61508 up to SIL 3.