Pepperl+Fuches KFA6-SR2-Ex1.W Switch Amplifier, 1-channel isolated barrier, 230 V AC supply, dry contact or NAMUR inputs.
This isolated barrier is used for intrinsic safety applications. It transfers digital signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area.
The proximity sensor or switch controls a form C changeover relay contact for the safe area load. The barrier output changes state when the input signal changes state. The normal output state can be reversed using switch S1. Switch S3 is used to enable or disable line fault detection of the field circuit.
During an error condition, relays revert to their de-energized state and LEDs indicate the fault according to NAMUR NE44.
Technical Data
General specifications
Signal type Digital Input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 2
Supply
Connection terminals 14, 15
Rated voltage Ur 207 ... 253 V AC, 45 ... 65 Hz
Power dissipation 1 W
Power consumption max. 1 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 ā¤ 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 253 V AC/2 A/cos Ļ > 0.7; 126.5 V AC/4 A/cos Ļ > 0.7; 40 V DC/2 A resistive load
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 Indicators/settings Display elements LEDs 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 Ā°C (-4 ... 140 Ā°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 2081 Marking 1 II (1)G [Ex ia Ga] IIC 1 II (1)D [Ex ia Da] IIIC 1 I (M1) [Ex ia Ma] I Input Ex ia Voltage Uo 10.6 V Current Io 19.1 mA Power Po 51 mW (linear characteristic) Supply Maximum safe voltage Um 253 V AC (Attention! Um is no rated voltage.) Output Contact loading 253 V AC/2 A/cos Ļ > 0.7; 126.5 V AC/4 A/cos Ļ > 0.7; 40 V DC/2 A resistive load
Maximum safe voltage Um 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 IEC 60079-0:2018+AC:2020 , EN 60079-11:2012
International approvals
FM approval
Control drawing 116-0035
UL approval
Control drawing 116-0145
CSA approval
Control drawing 116-0047
IECEx approval
IECEx certificate IECEx PTB 11.0031
IECEx marking [Ex ia Ga] IIC
[Ex ia Da] IIIC
[Ex ia Ma] I
