Pepperl Fuchs SMART Transmitter Power Supply KFD2-STC5-Ex1
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 4 mA ... 20 mA current sink/current source
Terminals with test points
Up to SIL 2 acc. to IEC/EN 61508
General specifications
Signal type Analog input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 2
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage 18 ... 30 V DC
Ripple within the supply tolerance
Power dissipation ≤ 1 W at maximum load
Power consumption ≤ 1.6 W at maximum load
Input
Connection side field side
Connection terminals 1+, 2-, 3
Input signal 4 ... 20 mA
Open circuit voltage/short-circuit current terminals 1+, 3: 23 V /
25 mA
Input resistance max. 265 Ω terminals 2-, 3 , max. 330 Ω terminals
1+, 3
Available voltage ≥ 16 V at 20 mA ; ≥ 20 V at 4 mA , terminals 1+,
3
Output
Connection side control side
Connection terminals 7+, 8-, 9- (sink)
terminals 7-, 8+, 9+ (source)
see additional information
Load 0 ... 800 Ω
Output signal 4 ... 20 mA (overload > 25 mA)
Ripple max. 50 µA rms
External supply (loop) 2 ... 30 V DC
If the external voltage is > 19 V, a load ≥ ((V - 19) / 0.02) Ω
is required. V represents the value of the external voltage.
The internal 250 Ω resistor at terminal 9 can be used as a load.
Transfer characteristics
Deviation at 20 °C (68 °F), 4 ... 20 mA
≤ 10 µA incl. calibration, linearity, hysteresis, loads and
fluctuations of supply voltage
Influence of ambient temperature ≤ 0.25 µA/K
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 100 µs
Galvanic isolation
Output/power supply functional insulation, rated insulation voltage
50 V AC
Indicators/settings
Display elements LED
Labeling space for labeling at the front
Directive conformity
Electromagnetic compatibility
Directive 2014/30/EU EN 61326-1:2013 (industrial locations)
Conformity
Electromagnetic compatibility NE 21:2012
EN 61326-3-2:2008
Degree of protection IEC 60529:2001
Protection against electrical shock UL 61010-1:2012
Ambient conditions
Ambient temperature -20 ... 70 °C (-4 ... 158 °F)
Mechanical specifications
Degree of protection IP20
Connection screw terminals
Mass approx. 150 g
Dimensions 20 x 124 x 115 mm (0.8 x 4.9 x 4.5 inch) (W x H x D) ,
housing type B2
Height 124 mm
Width 20 mm
Depth 115 mm
Mounting on 35 mm DIN mounting rail acc. to EN 60715:2001
Data for application in connection with hazardous areas
EU-type examination certificate CML 17 ATEX 2029X
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
Input [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Supply
Maximum safe voltage 250 V (Attention! The rated voltage can be
lower.)
Equipment terminals 1+, 3-
Voltage 26.2 V
Voltage 27.25 V
Current 93 mA
Power 634 mW
Equipment terminals 2-, 3
Voltage 30 V
Current 115 mA
Power max 1 W
Voltage 2 V
Current 8.5 mA
Power 4.3 mW
Equipment terminals 1+, 2 / 3-
Voltage 26.2 V
Voltage 27.25 V
Current 115 mA
Power 784 mW
Certificate CML 17 ATEX 3028X
Marking Ex-Hexagon II 3G Ex ec IIC T4 Gc
Galvanic isolation
Input/Output safe electrical isolation acc. to IEC/EN
60079-11:2007, voltage peak value 375 V
Input/power supply safe electrical isolation acc. to IEC/EN
60079-11:2007, voltage peak value 375 V
Directive conformity
Directive 2014/34/EU EN IEC 60079-0:2018 , EN 60079-7:2015+A1:2018
, EN 60079-11:2012
International approvals
UL approval E106378
Control drawing 116-0439 (cULus)
IECEx approval
IECEx certificate IECEx CML 17.0015X
IECEx marking [Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I , Ex
ec IIC T4 Gc
