KFD2 STC5 Ex

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
Function
This isolated barrier is used for intrinsic safety applications.
The device supplies 2-wire and 3-wire SMART transmitters, and can also be used with 2-wire SMART current sources.
It transfers the analog input signal to the safe area as an isolated current value.
Digital signals may be superimposed on the input signal in the hazardous or non-hazardous area and are transferred bi-directionally.
The device provides a sink mode or a source mode output on the safe area terminals.
The device has an internal resistor. Use this resistor if the HART communication resistance in the control circuit is too low.
Test sockets for the connection of HART communicators are integrated into the terminals of the device.
Application
The device supports the following SMART protocols:
l HART
l BRAIN
l Foxboro
Connection
KFD2-STC5-Ex1
+ -
1+ 7
HART
2-
HART
mA -V +
3 8
9
250 Ω
Release date: 2023-06-05 Date of issue: 2023-06-05 Filename: 70124109_eng.pdf
14+
15-
24 V DC
Zone 0, 1, 2 24 V DC Zone 2
Div. 1, 2 Power Rail Div. 2
Technical Data
General specifications
Signal type Analog input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 2
Supply
Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

Pepperl+Fuchs Group USA: +1 330 486 0002 Germany: +49 621 776 2222 Singapore: +65 6779 9091
www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com pa-info@sg.pepperl-fuchs.com 1
SMART Transmitter Power Supply KFD2-STC5-Ex1
Technical Data
Connection Power Rail or terminals 14+, 15-
Rated voltage Ur 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
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

Technical Data
Marking 1 II (1)G [Ex ia Ga] IIC
1 II (1)D [Ex ia Da] IIIC
1 I (M1) [Ex ia Ma] I
Input [Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
Supply
Maximum safe voltage Um 250 V (Attention! The rated voltage can be lower.)
Equipment terminals 1+, 3-
Voltage Uo 26.2 V
Voltage Uq 27.25 V
Current Io 93 mA
Power Po 634 mW
Equipment terminals 2-, 3
Voltage Ui 30 V
Current Ii 115 mA
Power Pi max 1 W
Voltage Uo 2V
Current Io 8.5 mA
Power Po 4.3 mW
Equipment terminals 1+, 2 / 3-
Voltage Uo 26.2 V
Voltage Uq 27.25 V
Current Io 115 mA
Power Po 784 mW
Certificate CML 17 ATEX 3028X
Marking 1 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
General information
Supplementary information Observe the certificates, declarations of conformity, instruction manuals, and manuals
where applicable. For information see www.pepperl-fuchs.com.

Assembly
Front view
Removable terminal
blue
1 2 3
4 5 6
KFD2-STC5-Ex1
LED green:
PWR Power supply
7 8 9
10 11 12
13 14 15
Removable terminals
green
Matching System Components

KFD2-EB2 Power Feed Module
UPR-03 Universal Power Rail with end caps and cover, 3 conductors, length: 2 m
UPR-03-M Universal Power Rail with end caps and cover, 3 conductors, length: 1,6 m
UPR-03-S Universal Power Rail with end caps and cover, 3 conductors, length: 0.8 m
K-DUCT-BU Profile rail, wiring comb field side, blue

K-DUCT-BU-UPR-03 Profile rail with UPR-03- * insert, 3 conductors, wiring comb field side, blue
Accessories
K-250R Measuring resistor
K-500R0%1 Measuring resistor
KF-ST-5GN Terminal block for KF modules, 3-pin screw terminal, green
KF-STP-5GN Terminal block for KF modules, 3-pin screw terminal, with test sockets, green

Accessories
KF-STP-5BU Terminal block for KF modules, 3-pin screw terminal, with test sockets, blue
KF-CP Red coding pins, packaging unit: 20 x 6


Connection
The device provides an output on the control side terminals. This output can be operated in the current sink operating mode or
current source operating mode. Please refer to the following diagram for connection.
Sink mode Source mode

output output
+ -
7
HART
-V +
8
9
250 Ω
6
www.pepperl-fuchs.com pa-info@us.pepperl-fuchs.com pa-info@de.pepperl-fuchs.com pa-info@sg.pepperl-fuchs.com

KFD2 STC5 Ex

Uploaded by

Copyright:

Available Formats

KFD2 STC5 Ex

Uploaded by

Document Information

Original Description:

Original Title

Copyright

Available Formats

Share this document

Share or Embed Document

Sharing Options

Did you find this document useful?

Is this content inappropriate?

Copyright:

Available Formats

KFD2 STC5 Ex

Uploaded by

Copyright:

Available Formats

SMART Transmitter Power Supply

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

where applicable. For information see www.pepperl-fuchs.com.

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

Matching System Components

K-DUCT-BU Profile rail, wiring comb field side, blue

K-500R0%1 Measuring resistor

KF-ST-5GN Terminal block for KF modules, 3-pin screw terminal, green

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

KF-CP Red coding pins, packaging unit: 20 x 6

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

Sink mode Source mode

Refer to "General Notes Relating to Pepperl+Fuchs Product Information".

You might also like