Switch Amplifier KFD2-ST3-Ex2

2-channel isolated barrier
24 V DC supply (Power Rail)
Dry contact or NAMUR inputs
Active transistor output
Line fault detection (LFD)
Reversible mode of operation
Up to SIL 2 acc. to IEC 61508

Datasheet
Function
Documents
CAD+CAE
Approvals+Certificates
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-ST3-Ex2

General specifications
Signal type		Digital Input
Functional safety related parameters
Safety Integrity Level (SIL)		SIL 2
Supply
Connection		Power Rail or terminals 14+, 15-
Rated voltage		19 ... 30 V DC
Ripple		≤ 10 %
Rated current		20 ... 15 mA + I_out
Power dissipation		≤ 900 mW including maximum power dissipation in the output
Input
Connection side		field side
Connection		terminals 1+, 2+, 3-; 4+, 5+, 6-
Rated values		acc. to EN 60947-5-6 (NAMUR)
Open circuit voltage/short-circuit current		approx. 10 V DC / approx. 8 mA
Switching point/switching hysteresis		1.2 ... 2.1 mA / approx. 0.2 mA
Line fault detection		breakage I ≤ 0.1 mA , short-circuit I ≥ 6.5 mA
Pulse/Pause ratio		min. 100 µs / min. 100 µs
Output
Connection side		control side
Connection		output I: terminal 7+ ; output II: terminal 9+
Rated voltage		30 V DC
Rated current		100 mA
Response time		≤ 200 µs
Signal level		1-signal: (supply voltage) - 3 V max. for 100 mA 0-signal: blocked output (off-state current ≤ 10 µA)
Output I		signal ; Transistor
Output II		signal ; Transistor
Collective error message		Power Rail
Transfer characteristics
Switching frequency		≤ 5 kHz
Galvanic isolation
Input/Output		reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V_eff
Input/power supply		reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 V_eff
Indicators/settings
Display elements		LEDs
Control elements		DIP-switch
Configuration		via DIP switches
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
Input		EN 60947-5-6:2000
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 119 x 115 mm (0.8 x 4.7 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		EXA 16 ATEX 0016 X
	Marking	II 3(1)G Ex nA [ia Ga] IIC T4 Gc II (1)D [Ex ia Da] IIIC I (M1) [Ex ia Ma] I
	Input	Ex ia
	Voltage	10.5 V
	Current	17.1 mA
	Power	45 mW (linear characteristic)
Supply
	Maximum safe voltage	253 V AC (Attention! U_m is no rated voltage.)
Output
	Maximum safe voltage	253 V AC (Attention! The rated voltage can be lower.)
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 60079-0:2012+A11:2013 , EN 60079-11:2012 , EN 60079-15:2010
International approvals
UL approval		E106378
	Control drawing	116-0424 (cULus)
IECEx approval
	IECEx certificate	IECEx EXA 16.0009X
	IECEx marking	Ex nA [ia Ga] IIC T4 Gc , [Ex ia Da] IIIC , [Ex ia Ma] I
General information
Supplementary information		Observe the certificates, declarations of conformity, instruction manuals, and manuals where applicable. For information see www.pepperl-fuchs.com.
Accessories
Optional accessories		power feed module KFD2-EB2 Universal Power Rail UPR-03 Universal Power Rail UPR-03-S profile rail K-DUCT-BU profile rail K-DUCT-UPR-03

Documents: KFD2-ST3-Ex2

Manuals	Language	File Type	File Size
Functional Safety Manual	ENG	PDF	621 KB
Manual	ENG	PDF	3524 KB
Handbuch	GER	PDF	3557 KB
Handbuch Funktionale Sicherheit	GER	PDF	629 KB
Instruction manuals
Инструкции	BUL	PDF	112 KB
Návod k poużití	CZE	PDF	146 KB
Instruktions manual	DAN	PDF	144 KB
Instruction manual	ENG	PDF	150 KB
Kasutusjuhend	EST	PDF	140 KB
Käyttöohje	FIN	PDF	140 KB
Manuel d'instructions	FRA	PDF	147 KB
Betriebsanleitung	GER	PDF	153 KB
Οδηγίες χρήσης	GRE	PDF	155 KB
Handleiding	HOL	PDF	146 KB
Instruction manual / Betriebsanleitung	HRV	PDF	144 KB
Használati útmutató	HUN	PDF	147 KB
Manuale di istruzioni	ITA	PDF	146 KB
Lietošanas pamācība	LAV	PDF	144 KB
Instrukciju vadovas	LIT	PDF	145 KB
Instrukcja obsługi	POL	PDF	148 KB
Manual de instruções	POR	PDF	147 KB
Manual de utilizare	RON	PDF	145 KB
Návod na poużitie	SLK	PDF	145 KB
Navodila za uporabo	SLV	PDF	143 KB
Manual de instrucciones	SPA	PDF	146 KB
Manual	SWE	PDF	142 KB

CAD+CAE: KFD2-ST3-Ex2

CAD	File Type	File Size
3-D model in IGS format / 3-D-Modell im IGS-Format	IGS	---
3-D model in STP format / 3-D-Modell im STP-Format	STP	2510 KB
CAD Portal / CAD Portal	LINK	---
Prolist
Prolist device specification / Prolist Gerätespezifikation	XML	342 KB

Approvals+Certificates: KFD2-ST3-Ex2

Statements of compliance	Certificate No.	File Type	File Size
EU-Declaration of conformity / EU-Konformitätserklärung	DOC-2638A	PDF	156 KB
Certificates
Canada UL cUL	E106378 cUL (QUZW7)	LINK	---
Canada UL cUL	E106378 cUL (QVAJ7)	LINK	---
China SITIIAS CCC Ex Certificate	2020322316002751 (Singapore)	PDF	1251 KB
EAC EAC TP TC 012/2011	TC RU C-DE.AA71.B.00291	PDF	2516 KB
EAC EAC TP TC 020/2011	TC RU C-DE.MH04.B.00397	PDF	680 KB
Europe EXA ATEX	EXA 16 ATEX 0016 X	PDF	2049 KB
Korea KOSHA	20-AV4BO-0493	PDF	165 KB
Korea KOSHA	20-AV4BO-0492	PDF	163 KB
USA Canada cULus Certificate of Compliance UL	CoC 20190517 - E106873 RepRef 20190514	PDF	253 KB
USA UL	E106378 UL (QVAJ)	LINK	---
USA UL	E106378 UL (QUZW)	LINK	---
Worldwide EXA Certificate of Conformity	IECEx EXA 16.0009X	LINK	---
Worldwide exida Functional Safety Assessment	P+F 1408-047-C R039 Assessment Report V1 R1	PDF	1125 KB
Control drawings
Control Drawing UL / Control Drawing UL		PDF	129 KB

Associated Products: KFD2-ST3-Ex2

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

	UPR-03 Universal Power Rail
	35 mm DIN mounting rail with 3-conductor insert, Provides DC supply voltage to all equipped K-System modules, Standard length 2 m (6 foot), simple to customize to application space, Eliminates daisy-chainspa

	UPR-03-S Universal Power Rail
	35 mm DIN mounting rail with 3-conductor insert, Provides DC supply voltage to all equipped K-System modules, Standard length 0.8 m (2.6 ft), simple to customize to application space, Eliminates daisy-chainspa

	UPR-03-M Universal Power Rail
	35 mm DIN mounting rail with 3-conductor insert, Provides DC supply voltage to all equipped K-System modules, Standard length 1.6 m (5 foot), simple to customize to application space, Eliminates daisy-chainspa

	K-DUCT-BU Profile Rail
	Cable trunking is integrated in the mounting profile, Safe spacious separation of safe and hazardous 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-BU-UPR-03 Profile Rail
	Cable trunking with integrated Power Rail UPR-03, Safe spacious separation of safe and hazardous 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

	F-NR2-Ex1 NAMUR Resistor Network
	1-channel, Dry contact input, For line fault detection (LFD)pa

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

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

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

Function: KFD2-ST3-Ex2

This isolated barrier is used for intrinsic safety applications.

The device transfers digital signals (NAMUR sensors or dry contacts) from a hazardous area to a safe area.

Each input controls an active transistor output.

Via switches the mode of operation can be reversed and the line fault detection can be switched off.

A fault is signalized by LEDs acc. to NAMUR NE44 and a separate collective error message output.

General Notes Relating to Pepperl+Fuchs Product Information

Quick Links

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.