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Pepperl+Fuchs, Switch, Switch Amplifier, Switch Amplifier
KFD2-SR2-Ex2.W
2-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 acc. to IEC 61508/IEC 61511
| Signal type | Digital Input |
| Safety Integrity Level (SIL) | SIL 2 |
| Connection | Power Rail or terminals 14+, 15- |
| Rated voltage | 19 … 30 V DC |
| Ripple | ≤ 10 % |
| Rated current | ≤ 50 mA |
| Power dissipation | ≤ 1 W |
| Power consumption | ≤ 1 W |
| Connection side | field side |
| Connection | terminals 1+, 2+, 3-; 4+, 5+, 6- |
| 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 | output I: terminals 7, 8, 9 ; output II: terminals 10, 11, 12 |
| Output I, II | 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 |
| Output/Output | 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 | 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 | -20 … 70 °C (-4 … 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) , housing type B2 |
| Mounting | on 35 mm DIN mounting rail acc. to EN 60715:2001 |
| EU-type examination certificate | PTB 00 ATEX 2080 |
| Certificate | PF 08 CERT 0803 |
| Input | Ex ic |
| Certificate | TÜV 99 ATEX 1493 X |
| UL approval | E106378 |
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