Pepperl Fuchs KFD2-SRA-Ex4

Switch Amplifier

MPN: KFD2-SRA-Ex4
Category: K-System (DIN Rail Mounting)

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What is the Pepperl Fuchs KFD2-SRA-Ex4?

4-channel isolated barrier

24 V DC supply (Power Rail)

Dry contact or NAMUR inputs

50 % less wiring, 2:1 technology

Relay contact output

Line fault detection (LFD)

Reversible mode of operation

4-channel isolated barrier, 24 V DC supply (Power Rail), Dry contact or NAMUR inputs, 50 % less wiring, 2:1 technology, Relay contact output, Line fault detection (LFD), Reversible mode of operation, Housing width: 20 mm, Number of channels: 4-channel, 2:1 Method, Rated voltage: 19 ... 30 V DC, Field device: NAMUR sensor, Field device [2]: volt-free contact, Line fault detection, Type: 4 x relay (NO contact), Reversible mode of operation

Specifications

General specifications

Order code (Pepperl+Fuchs part number)	190176
Signal type	Digital Input
Lifecycle	Active (current Pepperl+Fuchs product)

Supply

Connection	Power Rail or terminals 14+, 15-
Rated voltage	19 ... 30 V DC Ur
Ripple	≤ 10 %
Rated current	45 ... 70 mA Ir
Power dissipation	1.2 W

Input

Connection side	field side
Connection	terminals 1-, 2+, 3-; 4-, 5+, 6-
Rated values	acc. to EN 60947-5-6 (NAMUR), see manual for electrical data
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
Pulse/Pause ratio	min. 35 ms / min. 35 ms (non-AC operation) min. 70 ms / min. 70 ms (AC operation)
Line fault detection	breakage I ≤ 0.15 mA , short-circuit I > 6 mA

Output

Connection side	control side
Connection	output I: terminals 7, 8 ; output II: terminals 8, 9 ; output III: terminals 10, 11 ; output IV: terminals 11, 12
Output I ... IV	Signal I ... Signal IV ; relay
Contact loading	253 V AC/2 A /cos φ > 0.7; 40 V DC/2 A resistive load;
Energized/De-energized delay	approx. 30 ms / approx. 30 ms
Mechanical life	5 x 106 switching cycles
Collective error message	Power Rail

Transfer characteristics

Switching frequency

≤ 10 Hz (non-AC operation) ≤ 3 Hz (AC operation)

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	basic 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

Conformity

Electromagnetic compatibility	NE 21:2006
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) (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	ZELM 99 ATEX 0009
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 IIC
Voltage	10 V Uo
Current	14 mA Io
Power	35 mW (linear characteristic) Po
Supply: Maximum safe voltage	40 V DC (Attention! Um is no rated voltage.) Um
Output: Contact loading	230 V AC + 10 % / 2 A / 100 VA / cos φ ≥ 0.7; 40 V DC / 2 A resistive load
Fault indication output: Maximum safe voltage	40 V DC Um
Galvanic isolation: Input/input	not available
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 60079-11:2012 , EN 50303:2000

International approvals

UL approval: Control drawing	116-0145
IECEx approval: IECEx certificate	IECEx TUN 04.0003
IECEx approval: IECEx marking	[Ex ia Ga] IIC, [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 (9)

KFD2-SRA-Ex4: frequently asked questions

When can KFD2-SRA-Ex4 be shipped?

KFD2-SRA-Ex4 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-SRA-Ex4 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-SRA-Ex4 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-SRA-Ex4, subject to availability and destination.