low voltage


Good news!Pepperl Fuchs KFD2-STC4-Ex1-Y1 in stock now!

Good news!

                        Pepperl Fuchs isolated barrier  KFD2-STC4-Ex1-Y1 in stock now!


SMART Transmitter Power Supply, Output Current Sink KFD2-STC4-Ex1-Y1
1-channel isolated barrier
24 V DC supply (Power Rail)
Input 2-wire and 3-wire SMART transmitters and 2-wire SMART current sources
Output 0/4 mA ... 20 mA current sink
Terminal blocks with test sockets
Up to SIL 2 acc. to IEC 61508


KFD2-STC4-Ex1-Y1 product specification as below 
Transfer characteristics
Deviation at 20 °C (68 °F), 0/4 ... 20 mA
≤ 10 µA incl. calibration, linearity, hysteresis, loads and fluctuations of supply voltage
Frequency range field side into the control side: bandwidth with 0.5 Vpp signal 0 ... 7.5 kHz (-3 dB) 
control side into the field side: bandwidth with 0.5 Vpp signal 0.3 ... 7.5 kHz (-3 dB)
Settling time 200 µs
Rise time/fall time 20 µs
Display elements LED
Labeling space for labeling at the front
Directive conformity
Electromagnetic compatibility  
  Directive 2014/30/EU EN 61326-1:2013 (industrial locations)
Electromagnetic compatibility NE 21:2011
Degree of protection IEC 60529:2001
Ambient conditions
Ambient temperature -20 ... 60 °C (-4 ... 140 °F)
Mechanical specifications
Degree of protection IP20
Connection screw terminals
Mass approx. 200 g
Dimensions 20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) , housing type B2
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-Type Examination Certificate BAS 99 ATEX 7060 X
  Marking Ex-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
Certificate TÜV 99 ATEX 1499 X
  Marking Ex-Hexagon II 3G Ex nA II T4 [device in zone 2]
Directive conformity  
  Directive 2014/34/EU EN 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
UL approval  
  Control drawing 116-0428 (cULus)
IECEx approval IECEx BAS 04.0016X 
IECEx CML 15.0055X
  Approved for [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Ex nA IIC T4 Gc

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Contact details

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