Pepperl Fuchs KFD2-SR2-Ex1.W

Switch Amplifier

MPN: KFD2-SR2-Ex1.W
Category: K-System (DIN Rail Mounting)

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What is the Pepperl Fuchs KFD2-SR2-Ex1.W?

1-channel isolated barrier

24 V DC supply (Power Rail)

Dry contact or NAMUR inputs

Relay contact output

Line fault detection (LFD)

Reversible mode of operation

Up to SIL 2 (SC 3) acc. to IEC/EN 61508

1-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, Relay contact output, Line fault detection (LFD), Reversible mode of operation, Up to SIL 2 (SC 3) acc. to IEC/EN 61508, Housing width: 20 mm, Number of channels: 1-channel, Safety Integrity Level (SIL): SIL 2, Systematic capability (SC): SC 3, Rated voltage: 19 ... 30 V DC, Field device: NAMUR sensor, Field device [2]: volt-free contact, Line fault detection, Type: 1 x relay (change-over contact)

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	70101737
Signal type	Digital Input
Lifecycle	Active (current Pepperl+Fuchs product)

Functional safety related parameters

Safety Integrity Level (SIL)	SIL 2
Systematic capability (SC)	SC 3

Supply

Connection	Power Rail or terminals 14+, 15-
Rated voltage	19 ... 30 V DC Ur
Ripple	≤ 10 %
Rated current	≤ 35 mA Ir
Power dissipation	≤ 0.7 W
Power consumption	≤ 0.7 W

Input

Connection side	field side
Connection	terminals 1+, 2+, 3-
Rated values	acc. to EN 60947-5-6 (NAMUR)
Open circuit voltage/short-circuit current	approx. 8 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 mA
Pulse/Pause ratio	min. 20 ms / min. 20 ms

Output

Connection side	control side
Connection	terminals 7, 8, 9
Output	signal ; relay
Contact loading	250 V AC/2 A/cos φ > 0.75; 126.5 V AC/4 A/cos φ > 0.75; 40 V DC/2 A resistive load
Minimum switch current	2 mA / 24 V DC
Energized/De-energized delay	approx. 20 ms / approx. 20 ms
Mechanical life	107 switching cycles
Collective error message	Power Rail

Transfer characteristics

Switching frequency

< 10 Hz

Galvanic isolation

Input/Output	reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Input/power supply	reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff
Output/power supply	reinforced insulation according to IEC/EN 61010-1, rated insulation voltage 300 Veff

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)
Low voltage: Directive 2014/35/EU	EN 61010-1:2010+A1:2019+A1:2019/AC:2019

Conformity

Electromagnetic compatibility	NE 21:2017 , EN 61326-3-1:2017 , EN IEC 61326-3-2:2018
Degree of protection	IEC 60529:1989+A1:1999+A2:2013
Functional safety	IEC/EN 61508:2010
Input	EN 60947-5-6:2000

Ambient conditions

Ambient temperature

-40 ... 70 °C (-40 ... 158 °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) (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	PTB 00 ATEX 2080
Marking	II (1)G [Ex ia Ga] IIC [exsign] II (1)D [Ex ia Da] IIIC [exsign] I (M1) [Ex ia Ma] I
Input	Ex ia
Voltage	10.5 V Uo
Current	13 mA Io
Power	34 mW (linear characteristic) Po
Supply: Maximum safe voltage	253 V AC / 125 V DC (Attention! Um is no rated voltage.) Um
Output: Maximum safe voltage	253 V AC (Attention! The rated voltage can be lower.) Um
Fault indication output: Maximum safe voltage	40 V DC (Attention! Um is no rated voltage.) Um
Certificate	PF 08 CERT 0803
Marking	II (3)G [Ex ic Gc] IIC
Input	Ex ic
Voltage	10.5 V Uo
Current	13 mA Io
Power	34 mW (linear characteristic) Po
Certificate	TÜV 99 ATEX 1493 X
Marking	II 3G Ex ec nC IIC T4 Gc
Galvanic isolation: Input/Output	safe electrical isolation acc. to IEC/EN 60079-11, voltage peak value 375 V
Galvanic isolation: 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 60079-7:2015+A1:2018 , EN IEC 60079-11:2024 , EN IEC 60079-15:2019

International approvals

FM approval: FM certificate	FM19US0207X
FM approval: Control drawing	116-0035
UL approval	E106378
Control drawing	116-0473 (cULus)
Contact loading	250 V AC/2 A/cos φ > 0.75; 126.5 V AC/4 A/cos φ > 0.75; 30 V DC/2 A resistive load
IECEx approval: IECEx certificate	IECEx PTB 11.0034 , IECEx TUN 19.0013X
IECEx approval: IECEx marking	[Ex ia Ga] IIC [Ex ia Da] IIIC [Ex ia Ma] I Ex ec nC 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.

Downloads & documentation

Official documents from Pepperl Fuchs, downloaded directly from the manufacturer.

Data sheets & manuals

CAD & dimension drawings

Certificates (10)

KFD2-SR2-Ex1.W: frequently asked questions

When can KFD2-SR2-Ex1.W be shipped?

KFD2-SR2-Ex1.W is sourced on request — request a quote and we'll confirm the exact availability and shipping timeline for this specific unit.

Can I pick up KFD2-SR2-Ex1.W in person?

Local pickup from our Groningen, Netherlands warehouse may be possible — contact us before ordering to check availability and arrange a collection time.

Is express delivery available?

Yes — mention it when you request a quote for KFD2-SR2-Ex1.W and we'll include express shipping options in our reply.

My factory is down and I need this urgently — can you help?

For a critical breakdown, contact us directly at +31 (0)50-7110348 or sales@partnerplc.com — we can look into same-day courier or dedicated taxi/hotshot delivery for KFD2-SR2-Ex1.W, subject to availability and destination.