SMART Transmitter Power Supply KFD2-STC4-Ex2

2-channel isolated barrier
24 V DC supply (Power Rail)
Input 2-wire SMART transmitters
Output 0/4 mA ... 20 mA
Terminals with test points
Up to SIL 2 acc. to IEC/EN 61508

Technical Data
Details
Informative Literature
Product Documentation
Design / Simulation
Approvals
Associated Products
Ask an Expert

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 KFD2-STC4-Ex2

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		20 ... 35 V DC
Ripple		within the supply tolerance
Power dissipation		1.8 W
Power consumption		max. 2.7 W
Input
Connection side		field side
Connection		terminals 1+, 3-; 4+, 6-
Input signal		0/4 ... 20 mA
Available voltage		≥ 16 V at 20 mA, terminals 1+, 3
Output
Connection side		control side
Connection		terminals 7-, 8+; 10-, 11+
Load		0 ... 550 Ω at 20 mA
Output signal		0/4 ... 20 mA (overload > 25 mA)
Ripple		max. 50 µA _rms
Transfer characteristics
Deviation		at 20 °C (68 °F), 0/4 ... 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: band width with 1 V_pp signal 0 ... 7.5 kHz (-3 dB) safe area to hazardous area: band width with 1 V_SS signal 0.3 ... 7.5 kHz (-3 dB)
Settling time		200 µs
Rise time/fall time		20 µs
Galvanic isolation
Output/power supply		functional insulation, rated insulation voltage 50 V AC
Output/Output		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 21:2011
Degree of protection		IEC 60529:2001
Protection against electrical shock		UL 61010-1:2012
Ambient conditions
Ambient temperature		-20 ... 60 °C (-4 ... 140 °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		BAS 99 ATEX 7025 X
	Marking	II (1)G [Ex ia Ga] IIC , II (1)D [Ex ia Da] IIIC , I (M1) [Ex ia Ma] I
	Input	[Ex ia Ga] IIC, [Ex ia Da] IIIC, [Ex ia Ma] I
	Voltage	25.2 V
	Current	93 mA
	Power	0.586 W
Supply
	Maximum safe voltage	250 V (Attention! The rated voltage can be lower.)
Certificate		TÜV 99 ATEX 1499 X
	Marking	II 3G Ex nA II T4
Galvanic isolation
	Input/Output	safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
	Input/power supply	safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Directive conformity
	Directive 2014/34/EU	EN IEC 60079-0:2018+AC:2020 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
UL approval		E106378
	Control drawing	116-0428 (cULus)
IECEx approval
	IECEx certificate	IECEx BAS 04.0015X IECEx CML 15.0055X
	IECEx marking	[Ex ia Ga] IIC , [Ex ia Da] IIIC , [Ex ia Ma] I Ex nA 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.

Classifications

System	Classcode
ECLASS 13.0	27210119
ECLASS 12.0	27210119
ECLASS 11.0	27210119
ECLASS 10.0.1	27210119
ECLASS 9.0	27210119
ECLASS 8.0	27210119
ECLASS 5.1	27210119
ETIM 9.0	EC001485
ETIM 8.0	EC001485
ETIM 7.0	EC001485
ETIM 6.0	EC001485
ETIM 5.0	EC001485
UNSPSC 12.1	32101514

Details: KFD2-STC4-Ex2

Function

This isolated barrier is used for intrinsic safety applications.

The device supplies 2-wire SMART transmitters in a hazardous area.

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 safe area and are transferred bi-directionally.

If the HART communication resistance in the loop is too low, the internal resistance of 250 Ω between terminals 8 and 9 can be used.

Test sockets for the connection of HART communicators are integrated into the terminals of the device.

Informative Literature: KFD2-STC4-Ex2

Literature	Language	File Type	File Size
Application Report - Energy Generation in Wastwater Treatment Plants	ENG	PDF	532 KB
Application Report - Generating Electricity in Coal-Fired Power Plants	ENG	PDF	412 KB
Application Report - Screening Systems in Sewage Treatment Plants	ENG	PDF	577 KB
Application Report - Sicherer Brennstofftransport in Kohlekraftwerken	ENG	PDF	391 KB
Application Report - Water Inlet in Wastewater Treatment Plants	ENG	PDF	526 KB

Product Documentation: KFD2-STC4-Ex2

Safety and Security Documentation	Language	File Type	File Size
Instruction manual	ENG	PDF	168 KB
Manual	ENG	PDF	557 KB
Manuals
Manual	ENG	PDF	3685 KB

Design / Simulation: KFD2-STC4-Ex2

CAD	Language	File Type	File Size
CAD 3-D / CAD 3-D	ALL	STP	3048 KB
CAD Portal / CAD Portal	ALL	LINK	---
CAE
EPLAN macro EDZ / EPLAN Makro EDZ	ALL	EDZ	61 KB

Approvals: KFD2-STC4-Ex2

Certificates	Certificate No.	Language	File Type	File Size
Australia SIMTARS	ANZEx 10.2002X	ALL	PDF	359 KB
Baseefa IECEx Certificate of Conformity	IECEx BAS 04.0015X	ALL	LINK	---
CML IECEx Certificate of Conformity Zone 2	IECEx CML 15.0055X	ALL	LINK	---
China SITIIAS CCC Ex Certificate	2021322316004096 (Singapore)	ALL	PDF	1112 KB
Europe Baseefa ATEX Category (1) GD	BAS 99 ATEX 7025X	ALL	PDF	3124 KB
Europe TUV Nord ATEX Category 3 G	TÜV 99 ATEX 1499X	ALL	PDF	1999 KB
India PESO (India) CCOE	A/P/HQ/MH/104/3770 (P345749)	ALL	PDF	551 KB
Japan TIIS	TC16175	ALL	PDF	2034 KB
Korea KOSHA	12-AV4BO-0438	ALL	PDF	283 KB
South Africa MASC	MASC MS/17-0850X	ALL	PDF	638 KB
USA Canada UL Hazardous Location Certificate of Compliance cULus UL E106378	CoC E106378 RepRef E106378-20161215	ALL	PDF	409 KB
exida Functional Safety Assessment Summary	P+F 05/09-21 R024	ALL	PDF	349 KB
Control Drawings
Control drawing UL / Control drawing UL		ALL	PDF	28 KB
Declaration of Conformity
EU Declaration of Conformity (P+F) / EU-Konformitäterklärung (P+F)	DOC-0038F	ALL	PDF	83 KB

Associated Products: KFD2-STC4-Ex2

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	K-DUCT-BU Profile Rail
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Accessories

	K-500R0%1 Measuring resistor
	1-channel, Precision resistor, Conversion of 4 mA ... 20 mA/2 V ... 10 Vpa

	K-250R Measuring resistor
	1-channel, Precision resistor, Conversion of 0 mA ... 20 mA/0 V ... 5 Vpa

	KF-STP-5BU Terminal Block with Test Plug Socket
	3-pin screw terminal, For KF modules of K-System, Integrated test sockets for connection of HART communicators, Packaging unit: 5 pieces bluepa

	KF-STP-5GN Terminal Block with Test Plug Socket
	3-pin screw terminal, For KF modules of K-System, Integrated test sockets for connection of HART communicators, Packaging unit: 5 pieces greenpa

	KF-ST-5GN Terminal Block
	3-pin screw terminal, For KF modules of K-System, Packaging unit: 5 pieces greenpa

	KF-CP Coding Pins
	Coding of K-System terminal blocks, Coding of LB/FB-System front sockets, Packaging unit: 20 x 6 coding pinspa

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Pepperl+Fuchs (India) Pvt. Ltd.
Ground Floor, #546/1, Sy. No. 46, 7th Main
4th Phase, Peenya Industrial Estate
Bangalore - 560058
India
info@in.pepperl-fuchs.com
phone +91 80 4609 6000

Pepperl+Fuchs is a leading developer and manufacturer of electronic sensors and components for the global automation market. Continuous innovation, enduring quality, and steady growth have been the foundation of our success for more than 70 years. Pepperl+Fuchs employs 6,300 people worldwide and has manufacturing facilities in Germany, USA, Singapore, Hungary, Indonesia and Vietnam, most of them ISO 9001 certified.