Product Specification

Switch Amplifier 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

Signal type Digital Input

Safety Integrity Level (SIL) SIL 2

Systematic capability (SC) SC 3

Connection Power Rail or terminals 14+, 15-

Rated voltage 19 ... 30 V DC

Ripple ≤ 10 %

Rated current ≤ 35 mA

Power dissipation ≤ 0.7 W

Power consumption ≤ 0.7 W

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

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

Switching frequency < 10 Hz

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

Display elements LEDs

Control elements DIP switch

Configuration via DIP switches

Labeling space for labeling at the front

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

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 temperature -40 ... 70 °C (-40 ... 158 °F)

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

EU-type examination certificate PTB 00 ATEX 2080

Marking Ex-Hexagon II (1)G [Ex ia Ga] IIC

Ex-Hexagon II (1)D [Ex ia Da] IIIC

Ex-Hexagon I (M1) [Ex ia Ma] I

Input Ex ia

Voltage 10.5 V

Current 13 mA

Power 34 mW (linear characteristic)

Supply

Maximum safe voltage 253 V AC / 125 V DC (Attention! Um is no rated voltage.)

Output

Maximum safe voltage 253 V AC (Attention! The rated voltage can be lower.)

Fault indication output

Maximum safe voltage 40 V DC (Attention! Um is no rated voltage.)

Certificate PF 08 CERT 0803

Marking Ex-Hexagon II (3)G [Ex ic Gc] IIC

Input Ex ic

Voltage 10.5 V

Current 13 mA

Power 34 mW (linear characteristic)

Certificate TÜV 99 ATEX 1493 X

Marking Ex-Hexagon 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

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 60079-11:2012 , EN IEC 60079-15:2019

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