Serviceline Industrial Sensors
Serviceline Explosion Protection

Switch Amplifier, Timer Relay KFA6-DU-Ex1.D

  • 1-channel isolated barrier
  • 230 V AC supply
  • Dry contact or NAMUR inputs
  • Relay contact and transistor output
  • Adjustable output timer functions from 10 ms ... 60 min
  • Input frequency up to 80 Hz; pulse divider up to 1 kHz
  • Reset function
  • Configurable by keypad
  • Line fault detection (LFD)

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-DU-Ex1.D

General specifications
Signal typeDigital Input
Connectionterminals 23, 24
Rated voltage230 V AC ± 10 %
Rated current15 mA
Power consumption4 VA
Connection sidefield side
ConnectionInput I: terminals 1+, 3- ; input II: terminals 13+, 14-
Input Iacc. to EN 60947-5-6 (NAMUR), see manual for electrical data
Open circuit voltage/short-circuit current8.2 V / 10 mA
Switching point/switching hysteresis1.2 ... 2.1 mA / approx. 0.2 mA
Pulse durationmin. 75 µs / 1 ms see instruction manuals; the maximum input frequency has to be observed.
Input frequency0 ... 80 Hz , pulse divider 0 ... 1 kHz
Line fault detectionbreakage I ≤ 0.15 mA; short-circuit I > 6.5 mA
Input IIreset
Active/PassiveI > 3 mA / I < 1.5 mA
Open circuit voltage/short-circuit current12 V / 3.5 mA
Pulse durationmin. 10 ms
Connection sidecontrol side
Connectionoutput I: terminals 10, 11, 12 ; output II: terminals 19+, 20-
Output Isignal , Relay output
Contact loading253 V AC/ 2 A / cos φ ≥ 0.7 ; 40 V DC/ 2 A
Mechanical life5 x 107 switching cycles
Energized/De-energized delayapprox. 20 ms / approx. 20 ms
Output IIsignal , electronic unit, isolated
Contact loading40 V / 50 mA
Energized/De-energized delayafter rising input flank 3 ms ; after falling input flank 2 ms
Signal level1-signal: (L+) -2.5 V (50 mA, short-circuit/overload proof)
0-signal: blocked output (off-state current ≤ 10 µA)
Transfer characteristics
Input I
Resolution< 0.1 % of the set value, min. 10 ms
Accuracy2 ms
Influence of ambient temperature0.003 %/K (50 ppm)
Galvanic isolation
Input I/other circuitsreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output I/power supply and resetreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output I, II against eachotherreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output II/power supplyreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output II/resetbasic insulation according to IEC/EN 61010-1, rated insulation voltage 50 Veff
Reset/power supplyreinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Display elementsLEDs , display
Control elementsControl panel
Configurationvia operating buttons
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 21:2006
Degree of protectionIEC 60529:2001
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
extended ambient temperature range up to 70 °C (158 °F), refer to manual for necessary mounting conditions
Mechanical specifications
Degree of protectionIP20
Connectionscrew terminals
Massapprox. 300 g
Dimensions40 x 119 x 115 mm (1.6 x 4.7 x 4.5 inch) , housing type C2
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificateTÜV 99 ATEX 1408
MarkingEx-Hexagon II (1)G [Ex ia Ga] IIC
Ex-Hexagon II (1)D [Ex ia Da] IIIC
Ex-Hexagon I (M1) [Ex ia Ma] I
Maximum safe voltage253 V AC (Attention! The rated voltage can be lower.)
Input Iterminals 1+, 3-: Ex ia
Voltage Uo10.1 V
Current Io13.5 mA
Power Po34 mW (linear characteristic)
Input IIterminals 13+, 14- non-intrinsically safe
Maximum safe voltage Um40 V (Attention! The rated voltage can be lower.)
Output Iterminals 10, 11, 12 non-intrinsically safe
Contact loading253 V AC/2 A/cos φ > 0.7; 40 V DC/2 A resistive load
Maximum safe voltage253 V (Attention! The rated voltage can be lower.)
Output IIterminals 19+, 20- non-intrinsically safe
Maximum safe voltage40 V (Attention! The rated voltage can be lower.)
CertificateTÜV 02 ATEX 1885 X
MarkingEx-Hexagon II 3G Ex nA nC IIC T4 Gc
Output I
Contact loading50 V AC/2 A/cos φ > 0.7; 40 V DC/2 A resistive load
Galvanic isolation
Input I/other circuitssafe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
Directive 2014/34/EUEN 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
FM approval
Control drawing16-538FM-12
UL approvalE223772
IECEx approval
IECEx certificateIECEx TUN 03.0000
IECEx marking[Ex ia Ga] IIC , [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

Documents: KFA6-DU-Ex1.D

ManualsLanguageFile TypeFile Size
Manual KF**-DU-EX1.DENGPDF1379 KB
System Manual ENGPDF3524 KB
Handbuch KF**-DU-EX1.DGERPDF1384 KB
SystemhandbuchGERPDF3557 KB
Instruction leaflets
Operator card KF**-DU-**1.D / Bedienkarte KF**-DU-**1.DALLPDF1417 KB
Instruction manuals
ИнструкцииBULPDF69 KB
Návod k poużitíCZEPDF61 KB
Instruktions manualDANPDF58 KB
Instruction manualENGPDF50 KB
KasutusjuhendESTPDF56 KB
KäyttöohjeFINPDF56 KB
Manuel d'instructionsFRAPDF97 KB
BetriebsanleitungGERPDF62 KB
Οδηγίες χρήσηςGREPDF73 KB
HandleidingHOLPDF72 KB
Instruction manual / BetriebsanleitungHRVPDF70 KB
Használati útmutatóHUNPDF71 KB
Manuale di istruzioniITAPDF93 KB
Lietošanas pamācībaLAVPDF68 KB
Instrukciju vadovasLITPDF68 KB
Instrukcja obsługiPOLPDF72 KB
Manual de instruçõesPORPDF72 KB
Manual de utilizareRONPDF71 KB
Návod na poużitieSLKPDF130 KB
Manual de instruccionesSPAPDF95 KB

Approvals+Certificates: KFA6-DU-Ex1.D

Statements of complianceCertificate No.File TypeFile Size
EU-Declaration of conformity / EU-KonformitätserklärungDOC-0041CPDF55 KB
Australia Test SafeANZEx 17.3006XPDF6788 KB
Brasil TUV Rheinland BrazilTÜV 13.1144PDF1323 KB
Canada FMCoC 3009603CPDF39 KB
China SITIIAS CCC Ex Certificate2020322316001444 (Singapore)PDF1226 KB
EAC Pepperl+Fuchs EAC TP TC 020/2011EAEC N RU D-DE.PA01.B.95500/21PDF748 KB
Europe TUV Nord ATEX Category (1)TÜV 99 ATEX 1408PDF2618 KB
Europe TUV Nord ATEX Category 3 GTÜV 02 ATEX 1885XPDF1101 KB
Russia Belarus Kazakhstan EAC EAC TP TC 012/2011EAEC RU C-DE.EX01.B.00102/19PDF9815 KB
South Africa MASCMASC MS/17-0864PDF471 KB
TUV Nord IECEx Certificate of ConformityIECEx TUN 03.0000LINK---
USA Canada UL cULus Hazardous Location UL E223772 ULCoC 20200622 - E223772 RepRef 20071210PDF82 KB
USA FMCoC 3009603PDF40 KB
Ukraine SERTIS ExSC 21.0646 XPDF12351 KB
Control drawings
Control Drawing FM / Control Drawing FM   PDF156 KB

Associated Products: KFA6-DU-Ex1.D

Matching System Components
Cable trunking is integrated in the mounting profile, Safe spacious separation of safe and hazardous signals, No additional cable guides necessary, Standard length 1.8 m (5.8 ft), simple to customize to application space, With mounting aidspa
1-channel, Dry contact input, For line fault detection (LFD)pa
3-pin screw terminal, For KF modules of K-System, Packaging unit: 5 pieces greenpa
3-pin screw terminal, For KF modules of K-System, Packaging unit: 5 pieces bluepa
Coding of K-System terminal blocks, Coding of LB/FB-System front sockets, Packaging unit: 20 x 6 coding pinspa

Function: KFA6-DU-Ex1.D

This isolated barrier is used for intrinsic safety applications. It is a highly configurable timer that accepts a digital signal (NAMUR sensor/mechanical contact) from a hazardous area and is commonly used in applications requiring on-delay, off-delay, one-shot, or pulse lengthening.

The output relay switch duration is easily adjusted, and a pulse divider function allows step-down ratios from 1:1 to 9999:1.

A reset can be activated via dry contact switch and used to terminate a particular time function. The unit is easily programmed by the use of a keypad located on the front of the unit. Line fault detection of the field circuit is indicated by a red LED.

For additional information, refer to the manual and