Serviceline Industrial Sensors
Serviceline Explosion Protection

Relay Module KFD2-RSH-1.2E.L3-Y1

  • 1-channel signal conditioner
  • 24 V DC supply
  • Logic input 20.5 V DC ... 26.4 V DC
  • Recommended connectable voltage 50 V AC ... 230 V AC, 60 V DC ... 110 V DC
  • Relay contact output for energized to safe function
  • Line fault transparency (LFT)
  • Diagnostic function
  • 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  KFD2-RSH-1.2E.L3-Y1

General specifications
Signal typeDigital Output
Functional safety related parameters
Safety Integrity Level (SIL)SIL 3
Systematic capability (SC)SC 3
ConnectionPower Rail or terminals 14+, 15-
Rated voltage19 ... 26.4 V DC
Input currentmax. 35 mA at 24 V DC , max. 44 mA at 19 V DC , with enabled internal fault detection
Power consumption< 1.7 W , includes the power consumption of the digital input , see derating curves
Connection sidecontrol side
Connectionterminals 7+, 8-
Pulse/Pause ratiomin. 150 ms / min. 150 ms with disabled internal fault detection
min. 1 s / min. 1 s with enabled internal fault detection
Test pulse lengthmax. 2 ms from DO card
Signal level0-signal: -5 ... 5 V DC
1-signal: 20.5 ... 26.4 V DC
Rated current0-signal: typ. 1.6 mA at 1.5 V DC; typ. 8 mA at 3 V DC (maximum leakage current DO card)
1-signal: ≥ 36 mA (minimum load current DO card)
Inrush current< 200 mA after 100 µs
Connection sidefield side
Connectionexternal voltage : terminals 5+/L, 2-/N
load : terminals 6, 3
Connectable voltage50 ... 230 V AC
60 ... 110 V DC
Power dissipation< 3.3 W at 5 A , see derating curves
Contact loading253 V AC/5 A/cos φ 0.7; 30 V DC/5 A resistive load , see derating curves
Minimum switch current10 mA
Mechanical life5 x 106 switching cycles
Line fault detectionlow voltage < 35 V AC
undercurrent: 10 mA AC; overcurrent: 5.5 A AC (relay energized)
breakage: 48 kΩ; short-circuit: 29 Ω (load, relay de-energized)
Fault indication output
Connectionterminals 10, 11
Contact loading30 V DC/ 0.5 A resistive load
Reaction time< 2 s
Mechanical life105 switching cycles
Transfer characteristics
Switching frequency< 3 Hz with disabled internal fault detection
< 0.5 Hz with enabled internal fault detection
Galvanic isolation
Input/power supplybasic insulation according to IEC/EN 61010-1, rated insulation voltage 60 Veff
Input/fault indication outputbasic insulation according to IEC/EN 61010-1, rated insulation voltage 30 Veff
Output/other circuitsreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Display elementsLEDs
Control elementsDIP switch
Configurationvia DIP switches
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 21:2017 , IEC/EN 61326-3-2:2018 , EN 61326-3-1:2017
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. 134 g
Dimensions20 x 119 x 115 mm (0.8 x 4.7 x 4.5 inch) (W x H x D) , housing type B2
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
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

Details: KFD2-RSH-1.2E.L3-Y1


This signal conditioner provides the galvanic isolation between field circuits and control circuits.

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

The energized to safe (ETS) function is permitted for SIL 3 applications.

An internal fault or a line fault is signalized by the impedance change of the relay contact input and an additional relay contact output.

A fault is signalized by LEDs and a separate collective error message output.

Informative Literature: KFD2-RSH-1.2E.L3-Y1

Language Selection:
LiteratureLanguageFile TypeFile Size
Safe Activation of the Fire Alarm for Efficient Fire ProtectionENGPDF295 KB

Product Documentation: KFD2-RSH-1.2E.L3-Y1

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF149 KB
Functional Safety ManualENGPDF1994 KB
System Manual ENGPDF3683 KB

Design / Simulation: KFD2-RSH-1.2E.L3-Y1

Language Selection:
CADLanguageFile TypeFile Size
3-D model / 3-D-ModellALLSTP2510 KB
CAD Portal / CAD PortalALLLINK---

Approvals: KFD2-RSH-1.2E.L3-Y1

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Worldwide TUV Rheinland Functional Safety AssessmentTÜV Rheinland Report 968/FSP 1538.01/20ALLPDF595 KB
Worldwide TUV Rheinland Functional Safety CertificateTÜV Rheinland Certificate 968/FSP 1538.01/20ALLPDF650 KB
Declaration of Conformity
EU-Declaration of conformity / EU-KonformitätserklärungDOC-3879AALLPDF71 KB

Associated Products: KFD2-RSH-1.2E.L3-Y1

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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.