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

Switch Amplifier, Timer Relay KFU8-SR-1.3L.V

  • 1-channel signal conditioner
  • Universal usage at different power supplies
  • 3-wire PNP/NPN sensor or push-pull input
  • 2 relay contact outputs
  • Adjustable energized/de-energized delay
  • 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  KFU8-SR-1.3L.V

General specifications
Signal typeDigital Input
Functional safety related parameters
Safety Integrity Level (SIL)SIL 2
Systematic capability (SC)SC 3
Connectionterminals 14, 15
Rated voltage20 ... 48 V DC or 90 ... 253 V AC , 45 ... 65 Hz
Rated current≤ 230 mA
Power dissipation2.3 W
Power consumptionmax. 4.5 W
Connection sidefield side
Connectionterminals 1+, 2, 3-
Rated values22 ... 24 V DC / 100 mA , see additional information
Short-circuit currentmax. 125 mA
Switching pointPNP:
0-signal: < 12.5 V
1-signal: > 13.5 V
NPN and push-pull output:
0-signal: < 4.5 V
1-signal: > 5.5 V
Connection sidecontrol side
Connectionoutput I: terminals 7, 8, 9
output II: terminals 10, 11, 12
Output I, IIsignal, relay
Contact loading250 V AC / 2 A / cos φ ≥ 0.7 ; 125 V AC/4 A/ cos φ > 0.7 ; 40 V DC / 2 A
Mechanical life20 x 106 switching cycles
Electrical life0.2 x 106 switching cycles (40 V DC, 2 A, ohmic)
0.4 x 106 switching cycles (253 V AC, 2 A, cos φ = 1)
0.25 x 106 switching cycles (253 V AC, 2 A, cos φ = 0.7)
Minimum load50 mW, 5 V DC
Energized/De-energized delay≤ 90 ms / ≤ 90 ms
Transfer characteristics
Switching frequency≤ 5 Hz for delay 0 s
adjustable energized/de-energized delay: 0 ... 79 s
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
Electromagnetic compatibilityNE 21:2012
Degree of protectionIEC 60529:2001
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 166 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
Supply48 V DC
CertificatePF 10 CERT 1417 X
MarkingEx-Hexagon II 3G Ex nA nC IIC T4 Gc
Output I, II
Contact loading50 V AC/2 A/cos φ > 0.7; 40 V DC/1 A resistive load
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 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: KFU8-SR-1.3L.V


This signal conditioner converts the state of 3-wire sensors (PNP or NPN) or sensors with push-pull output stages into two relay outputs.

It has one input and two form C changeover relay outputs.

The switch amplifier has an adjustable energized/de-energized delay for the relay outputs.

The start-up time of the device is as long as the time setting value + 500 ms.

Informative Literature: KFU8-SR-1.3L.V

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: KFU8-SR-1.3L.V

Language Selection:
Safety and Security DocumentationLanguageFile TypeFile Size
Instruction manualENGPDF41 KB
Functional Safety ManualENGPDF1925 KB
System ManualENGPDF3694 KB

Design / Simulation: KFU8-SR-1.3L.V

Language Selection:
CADLanguageFile TypeFile Size
CAD Portal / CAD PortalALLLINK---

Approvals: KFU8-SR-1.3L.V

Language Selection:
CertificatesCertificate No.LanguageFile TypeFile Size
Europe Pepperl+Fuchs Certificate of Compliance ATEX Category 3PF10CERT1417 XALLPDF189 KB

Associated Products: KFU8-SR-1.3L.V

Matching System Components
Cable trunking is integrated in the mounting profile, Safe spacious separation of field and control 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.