Serviceline Industrial Sensors
Serviceline Explosion Protection

Switch Amplifier KCD2-SR-Ex1.LB.SP

  • 1-channel isolated barrier
  • 24 V DC supply (Power Rail)
  • Dry contact or NAMUR inputs
  • Usable as signal splitter (1 input and 2 outputs)
  • Relay contact output
  • Fault relay contact output
  • Line fault detection (LFD)
  • Housing width 12.5 mm
  • Connection via spring terminals with push-in connection technology
  • Up to SIL 2 (SC 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  KCD2-SR-Ex1.LB.SP

General specifications
Signal typeDigital Input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
Systematic capability (SC)SC 3
ConnectionPower Rail or terminals 9+, 10-
Rated voltage19 ... 30 V DC
Ripple≤ 10 %
Rated current≤ 37 mA
Power dissipation≤ 750 mW
Power consumption≤ 750 mW
Connection sidefield side
Connectionterminals 1+, 2-
Rated valuesacc. to EN 60947-5-6 (NAMUR)
Open circuit voltage/short-circuit currentapprox. 8 V DC / approx. 8 mA
Switching point/switching hysteresis1.2 ... 2.1 mA / approx. 0.2 mA
Line fault detectionbreakage I ≤ 0.1 mA , short-circuit I ≥ 6.5 mA
Pulse/Pause ratiomin. 20 ms / min. 20 ms
Safety noteIf load voltage > 50 V, de-energize before removing the terminals.
Connection sidecontrol side
Connectionoutput I: terminals 5, 6 ; output II: terminals 7, 8
Output Isignal ; relay
Output IIsignal or fault message ; relay
Contact loading250 V AC/2 A/cos φ > 0.75; 126.5 V AC/4 A/cos φ > 0.75; 30 V DC/2 A resistive load
Minimum switch current2 mA / 24 V DC
Energized/De-energized delay≤ 20 ms / ≤ 20 ms
Mechanical life107 switching cycles
Transfer characteristics
Switching frequency≤ 10 Hz
Galvanic isolation
Input/Outputreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Input/power supplyreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/power supplyreinforced 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
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+A1:2019+A1:2019/AC:2019
Electromagnetic compatibilityNE 21:2017 , EN 61326-3-1:2017 , EN IEC 61326-3-2:2018
Degree of protectionIEC 60529:1989+A1:1999+A2:2013
Functional safetyIEC/EN 61508:2010
InputEN 60947-5-6:2000
Ambient conditions
Ambient temperature-40 ... 70 °C (-40 ... 158 °F)
Mechanical specifications
Degree of protectionIP20
Connectionspring terminals
Massapprox. 100 g
Dimensions12.5 x 119 x 114 mm (0.5 x 4.7 x 4.5 inch) (W x H x D) , housing type A2
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificateBASEEFA 06 ATEX 0092 X
MarkingEx-Hexagon II 3(1)G Ex ec nC [ia Ga] IIC T4 Gc , Ex-Hexagon II (1)D [Ex ia Da] IIIC , Ex-Hexagon I (M1) [Ex ia Ma] I
InputEx ia
Voltage10.5 V
Current13 mA
Power34 mW (linear characteristic)
Maximum safe voltage253 V AC (Attention! Um is no rated voltage.)
Contact loadingZone 2 : 50 V AC/2 A/cos φ > 0.75; 30 V DC/2 A resistive load
Maximum safe voltage253 V AC (Attention! The rated voltage can be lower.)
Fault indication output
Maximum safe voltage40 V DC (Attention! Um is no rated voltage.)
Galvanic isolation
Input/Outputsafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Input/power supplysafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
Directive 2014/34/EUEN IEC 60079-0:2018 , EN 60079-7:2015+A1:2018 , EN 60079-11:2012 , EN IEC 60079-15:2019
International approvals
UL approvalE106378
Control drawing116-0477 (cULus)
IECEx approval
IECEx certificateIECEx BAS 06.0025 X
IECEx markingEx ec nC [ia Ga] IIC T4 Gc
[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 11.027210121
ECLASS 10.0.127210121
ECLASS 9.027210121
ECLASS 8.027210121
ECLASS 5.127210121
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.132101514

Details: KCD2-SR-Ex1.LB.SP


This isolated barrier is used for intrinsic safety applications.

The device transfers digital signals from NAMUR sensors or dry contacts from the hazardous area to the non-hazardous area.

The proximity sensor or the mechanical contact controls the control side load for a relay contact output. The device output changes the state when the input signal changes the state.

Via switches the mode of operation can be reversed and the line fault detection can be switched off.

During a fault condition, the relay reverts to its de-energized state and the LEDs indicate the fault according to NAMUR NE 44.

If the device is operated via Power Rail, additionally a collective error message is available.

Due to its compact housing design and low heat dissipation, this device is useful for detecting positions, end stops, and switching states in space-critical applications.

Product Documentation: KCD2-SR-Ex1.LB.SP

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF171 KB
Functional Safety ManualENGPDF2003 KB
System Manual ENGPDF3673 KB

Design / Simulation: KCD2-SR-Ex1.LB.SP

Language Selection:
CADLanguageFile TypeFile Size
3-D model / 3-D-ModellALLSTP3047 KB

Approvals: KCD2-SR-Ex1.LB.SP

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Australia New Zealand SIMTARS Group IANZEx 08.2008XALLPDF258 KB
Baseefa IECEx Certificate of ConformityIECEx BAS 06.0025XALLLINK---
Brasil TUV Rheinland BrazilTÜV 13.1156 XALLPDF1291 KB
Canada UL cULE106378 cUL (QVAJ7)ALLLINK---
Canada UL cULE106378 cUL (QUZW7)ALLLINK---
China SITIIAS CCC Ex Certificate2021322316004215 (Bintan)ALLPDF1446 KB
Europe Baseefa ATEX Category (1) D ATEX Category 3 (1) G ATEX Category (M1)Baseefa 06 ATEX 0092XALLPDF137 KB
India PESO (India) CCOEA/P/HQ/KA/104/5968 (P546363)ALLPDF83 KB
USA UL UL UL E106378CoC 20210104 E106378 RepRef 20201218ALLPDF321 KB
United Arab Emirates SGS Gulf Limited ECASEx22-12-58723/E22-12-059592ALLPDF848 KB
United Kingdom Baseefa UK-Type Examination CertificateBAS21UKEX0011XALLPDF136 KB
Worldwide TUV Rheinland Functional Safety Certificate968/FSP 2150.02/21ALLPDF620 KB
Control Drawings
Control Drawing UL / Control Drawing UL   ALLPDF130 KB
Declaration of Conformity
EU-Declaration of conformity / EU-KonformitätserklärungDOC-5252BALLPDF108 KB
EU-Declaration of conformityTDOC-5252CENGENGPDF180 KB
UK-Declaration of conformity / UK-KonformitätserklärungDOC-5599ALLPDF98 KB

Associated Products: KCD2-SR-Ex1.LB.SP

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