Serviceline Industrial Sensors
Serviceline Explosion Protection

Switch Amplifier KFD2-SR2-Ex1.W

  • 1-channel isolated barrier
  • 24 V DC supply (Power Rail)
  • Dry contact or NAMUR inputs
  • Relay contact output
  • Line fault detection (LFD)
  • Reversible mode of operation
  • Up to SIL2 acc. to IEC 61508/IEC 61511

Download the complete datasheet as a PDF:

Datasheet excerpt: Technical data of KFD2-SR2-Ex1.W

General specifications
Signal typeDigital Input
ConnectionPower Rail or terminals 14+, 15-
Rated voltage20 ... 30 V DC
Ripple≤ 10 %
Rated current≤ 30 mA
Power dissipation0.7 W
Power consumption< 0.9 W
Connectionterminals 1+, 2+, 3-
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 mA
Pulse/Pause ratiomin. 20 ms / min. 20 ms
Connectionterminals 7, 8, 9
Outputsignal ; relay
Contact loading253 V AC/2 A/cos φ > 0.7; 126.5 V AC/4 A/cos φ > 0.7; 40 V DC/2 A resistive load
Minimum switch current2 mA / 24 V DC
Energized/De-energized delayapprox. 20 ms / approx. 20 ms
Mechanical life107 switching cycles
Transfer characteristics
Switching frequency< 10 Hz
Directive conformity
Electromagnetic compatibility
Directive 2004/108/ECEN 61326-1:2013 (industrial locations)
Low voltage
Directive 2006/95/ECEN 61010-1:2010
Electromagnetic compatibilityNE 21:2006
Degree of protectionIEC 60529:2001
Ambient conditions
Ambient temperature-20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protectionIP20
Massapprox. 150 g
Dimensions20 x 119 x 115 mm (0.8 x 4.7 x 4.5 in) , housing type B2
Mountingon 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with Ex-areas
EC-Type Examination CertificatePTB 00 ATEX 2080 , for additional certificates see
Group, category, type of protectionEx-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
Error message output
Maximum safe voltage Um40 V DC (Attention! Um is no rated voltage.)
Statement of conformityPF 08 CERT 0803
Group, category, type of protectionEx-Hexagon II (3)G [Ex ic Gc] IIC
Statement of conformityTÜV 99 ATEX 1493 X , observe statement of conformity
Group, category, type of protection, temperature classEx-Hexagon II 3G Ex nA nC IIC T4
Directive conformity
Directive 94/9/ECEN 60079-0:2012 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
FM approval
Control drawing116-0035
CSA approval
Control drawing116-0047
IECEx approvalIECEx PTB 11.0034
Approved for[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I

Approvals+Certificates: KFD2-SR2-Ex1.W

Statements of complianceCertificate No.File TypeFile Size
EU-Konformitätserklärung/EU-Declaration of conformityDOC-0170APDF103 KB
Canada CSACoC 1029981 PDF191 KB
exida Functional Safety AssessmentP+F 02/4-12 R007PDF370 KB
Europe PTB ATEX Category (1) GDPTB 00 ATEX 2080PDF2272 KB
Europe TUV Nord ATEX Category 3 GTÜV 99 ATEX 1493XPDF1702 KB
Europe Pepperl+FuchsPF 08 CERT 0803PDF246 KB
China NEPSIGYJ 12.1081PDF678 KB
USA FMCoC 3011578PDF314 KB
DNV GL MarineA-13714PDF41 KB
Korea KOSHA09-AV4B0-0222/0223/0224PDF577 KB
Belarus11-1-019-2013PDF1639 KB
PTB IECEx Certificate of ConformityIECEx PTB 11.0034LINK---
Brasil TUV Rheinland Brazil Ex nA nCTÜV 13.1124XPDF2904 KB
Brasil TUV Rheinland BrazilTÜV 13.1125PDF2855 KB
India PESO (India) CCOEA/P/HQ/MH/104/3356(P333188)PDF676 KB
Russia Belarus EAC Kazakhstan NANIO "CCVE"TC RU C-IT.GB05.B.00718PDF2731 KB
Control drawings
Control Drawing FM/Control Drawing FM   PDF171 KB
Control Drawing CSA/Control Drawing CSA   PDF159 KB