SMART Transmitter Power Supply KFD2-STC5-2

2-channel signal conditioner
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

Technical Data
Details
Product Documentation
Design / Simulation
Approvals
Associated Products

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-STC5-2

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		≤ 1.4 W at maximum load
Power consumption		≤ 2.6 W at maximum load
Input
Connection side		field side
Connection		terminals 1+, 2-, 3; 4+, 5-, 6
Input signal		4 ... 20 mA
Open circuit voltage/short-circuit current		terminals 1+, 3; 4+, 6: 23 V / 25 mA
Input resistance		max. 265 Ω terminals 2-, 3; 5-, 6 , max. 330 Ω terminals 1+, 3; 4+, 6
Available voltage		≥ 16 V at 20 mA ; ≥ 20 V at 4 mA , terminals 1+, 3; 4+, 6
Output
Connection side		control side
Connection		terminals 7+, 8-, 9-; 10+, 11-, 12- (sink) terminals 7-, 8+, 9+; 10-, 11+, 12+ (source) see additional information
Load		0 ... 600 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 terminals 9 and 12 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: 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		100 µs
Galvanic isolation
Input/Output		basic insulation according to IEC 61010-1, rated insulation voltage 300 V_eff
Input/power supply		basic insulation according to IEC 61010-1, rated insulation voltage 300 V_eff
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 21:2012 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
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 11.0	27210119
ECLASS 10.0.1	27210119
ECLASS 9.0	27210119
ECLASS 8.0	27210119
ECLASS 5.1	27210119
ETIM 8.0	EC001485
ETIM 7.0	EC001485
ETIM 6.0	EC001485
ETIM 5.0	EC001485
UNSPSC 12.1	32101514

Details: KFD2-STC5-2

Function

This signal conditioner provides the galvanic isolation between field circuits and control circuits.

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 as an isolated current value.

Digital signals may be superimposed on the input signal on the field side or on the control side and are transferred bi-directionally.

The device provides a sink mode or a source mode output on the control side 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.

Product Documentation: KFD2-STC5-2

Safety and Security Documentation	Language	File Type	File Size
Instruction manual	ENG	PDF	41 KB
Manuals
Functional Safety Manual	ENG	PDF	2024 KB
System Manual	ENG	PDF	3673 KB

Design / Simulation: KFD2-STC5-2

CAD	Language	File Type	File Size
3-D model / 3-D-Modell	ALL	STP	3048 KB
CAD Portal / CAD Portal	ALL	LINK	---
CAE
CAE EPLAN Data Portal / CAE EPLAN Data Portal	ALL	LINK	---
EPLAN macro P+F.KFD2-STC5-2.edz / EPLAN-Makro P+F.KFD2-STC5-2.edz	ALL	EDZ	101 KB

Approvals: KFD2-STC5-2

Certificates	Certificate No.	Language	File Type	File Size
USA Canada UL Hazardous Location Certificate of Compliance cULus UL E106378	CoC E106378 RepRef E106378-20171103	ALL	PDF	413 KB
Declaration of Conformity
EU-Declaration of conformity / EU-Konformitätserklärung	DOC-3647A	ALL	PDF	100 KB
UK-Declaration of conformity / UK-Konformitätserklärung	DOC-5298	ALL	PDF	63 KB

Associated Products: KFD2-STC5-2

Matching System Components

	KFD2-EB2 Power Feed Module
	Interface for Power Rail, Supply current ≤ 4 A, Replaceable fuse, Relay contact output, reversible, LED status indicationpa

	K-DUCT-GY Profile Rail
	Cable trunking is integrated in the mounting profile, Safe spacious separation of field and control signals, No additional cable guides necessary, Standard length 1.8 m (5.8 ft), simple to customize to application space, With mounting aidspa

	K-DUCT-GY-UPR-03 Profile Rail
	Cable trunking with integrated Power Rail UPR-03, Safe spacious separation of field and control signals, No additional cable guides necessary, Provides DC supply voltage to all equipped K-System modules, Standard length 1.8 m (5.8 ft), simple to customize to application space, With end caps UPR-E, cover and mounting aidspa

Accessories

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

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

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

	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-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 SE
Lilienthalstraße 200
68307 Mannheim
Germany
info@de.pepperl-fuchs.com
phone +49 621 776-0

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.