Pepperl Fuchs KFU8-SR-Ex1.W.LB

Switch Amplifier

MPN: KFU8-SR-Ex1.W.LB
Category: K-System (DIN Rail Mounting)

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What is the Pepperl Fuchs KFU8-SR-Ex1.W.LB?

1-channel isolated barrier

Universal usage at different power supplies

Dry contact or NAMUR inputs

Relay contact output

Fault 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, Universal usage at different power supplies, Dry contact or NAMUR inputs, Relay contact output, Fault 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 / 90 ... 253 V AC 50 ... 60 Hz, Field device: NAMUR sensor, Field device [2]: volt-free contact

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	204138
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	terminals 14, 15
Rated voltage	19 ... 30 V DC / 90 ... 253 V AC 50 ... 60 Hz Ur
Power dissipation/power consumption	≤ 1.2 W / ≤ 1.2 W ; 3.4 VA

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	output I: terminals 7, 8, 9 ; output II: terminals 10, 11, 12
Output I	signal ; relay
Output II	signal or fault message ; 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

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
Output/Output	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 , EN IEC 61326-1:2021 (industrial locations)
Degree of protection	IEC 60529:1989+A1:1999+A2:2013
Input	EN 60947-5-6:2000

Ambient conditions

Ambient temperature

-40 ... 60 °C (-40 ... 140 °F) extended ambient temperature range up to 70 °C (158 °F), refer to manual for necessary mounting conditions

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
Height	119 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	FIDI 22 ATEX 0029 X
Marking	II 3(1)G Ex ec nC [ia Ga] IIC T4 Gc [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 (Attention! Um is no rated voltage.) Um
Output: Maximum safe voltage	253 V AC (Attention! The rated voltage can be lower.) Um
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 , EN 60079-7:2015+A1:2018 , EN 60079-11:2012 , EN IEC 60079-15:2019

International approvals

UL approval	E106378
Control drawing	116-0489
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 FIDI 22.0003X
IECEx approval: IECEx marking	Ex ec nC [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.

Downloads & documentation

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

Data sheets & manuals

CAD & dimension drawings

Certificates (10)

KFU8-SR-Ex1.W.LB: frequently asked questions

When can KFU8-SR-Ex1.W.LB be shipped?

KFU8-SR-Ex1.W.LB 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 KFU8-SR-Ex1.W.LB 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 KFU8-SR-Ex1.W.LB 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 KFU8-SR-Ex1.W.LB, subject to availability and destination.