Serviceline Industrial Sensors
Phone: 330-486-0001
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Switch Amplifier KFA6-SR-2.3L

  • 2-channel signal conditioner
  • 115/230 V AC supply
  • 3-wire PNP/NPN sensor or push-pull input
  • Relay contact output
  • DIP switch selectable functions
  • Minimum/maximum control
  • Up to SIL 2 acc. to IEC/EN 61508 / IEC/EN 61511

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  KFA6-SR-2.3L

General specifications
Signal typeDigital Input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
Connectionterminals 14, 15
Rated voltage90 ... 253 V AC , 45 ... 65 Hz
Rated current≤ 150 mA
Power dissipation2.5 W
Power consumptionmax. 7 W
Connection sidefield side
ConnectionInput I: terminals 1+, 2, 3-; Input II: terminals 4+, 5, 6-
Rated values22 ... 24 V DC / 100 mA, see notes
NPN sensor
Switching point4 ... 13 V
PNP sensor
Switching point4 ... 13 V
Short-circuit current110 mA
Switching point0-signal: < 5 V
1-signal: > 13 V
Connection sidecontrol side
Connectionoutput I: terminals 7, 8, 9
output II: terminals 10, 11, 12
Output I, II
Contact loading250 V AC / 4 A / cos φ > 0.7; 40 V DC / 2 A resistive load
Energized/De-energized delaymax. 6 ms
Mechanical life107 switching cycles
Transfer characteristics
Switching frequency≤ 10 Hz
Galvanic isolation
Input/Outputsafe galvanic isolation per EN 50178, voltage peak value 253 V
Input/power supplysafe galvanic isolation per EN 50178, voltage peak value 253 V
Output/power supplysafe galvanic isolation per EN 50178, voltage peak value 253 V
Output/Outputbasic insulation acc. to EN 50178, rated insulation voltage 253 Veff
Display elementsLEDs
Labelingspace for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2004/108/ECEN 61326-1:2006
Low voltage
Directive 2006/95/ECEN 50178:1997
Galvanic isolationEN 50178
Electromagnetic compatibilityNE 21
Degree of protectionIEC 60529
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 150 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
General information
Supplementary informationObserve the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see


ECLASS 13.027210121
ECLASS 12.027210121
ECLASS 11.027210121
ECLASS 10.0.127210121
ECLASS 9.027210121
ECLASS 8.027210121
ECLASS 5.127210121
ETIM 9.0EC001485
ETIM 8.0EC001485
ETIM 7.0EC001485
ETIM 6.0EC001485
ETIM 5.0EC001485
UNSPSC 12.132101514

Details: KFA6-SR-2.3L


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

The device transfers the status of 2-wire and 3-wire sensors to the relay contact output.

The device has 2 inputs and 2 relay contact outputs.

The device can be used either as dual channel signal conditioner or as a two-point level controller.

The device is easily configured by the use of DIP switches.

A fault is signalized by LEDs.

Informative Literature: KFA6-SR-2.3L

Language Selection:
LiteratureLanguageFile TypeFile Size
Application Report - Biological Cleaning of Wastwater and Secondary Sedimentation StageENGPDF566 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

Product Documentation: KFA6-SR-2.3L

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF41 KB
System ManualENGPDF3694 KB

Design / Simulation: KFA6-SR-2.3L

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

Approvals: KFA6-SR-2.3L

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
exida Functional Safety AssessmentP+F 05/12-35 R026ALLPDF216 KB

Associated Products: KFA6-SR-2.3L

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