Pepperl+Fuchs isolated barrier KFD2-SR2-EX.1.W.LB

Pepperl+Fuchs isolated barrier KFD2-SR2-EX.1.W.LB

Switch Amplifier KFD2-SR2-Ex1.W.LB

Pepperl+Fuchs isolated barrier KFD2-SR2-EX.1.W.LB

Features
• 1-channel isolated barrier
• 24 V DC supply (Power Rail)
• Dry contact or NAMUR inputs
• Usable as signal splitter (1 input and 2 outputs)
• Relay contact output
• Fault relay contact output
• Line fault detection (LFD)
• Reversible mode of operation
• Up to SIL 2 acc. to IEC 61508/IEC 61511

Pepperl+Fuchs isolated barrier KFD2-SR2-EX.1.W.LB

Function
This isolated barrier KFD2-SR2-Ex1.W.LB 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 normal output state can be reversed using switch S1. Switch S2 allows output II to be switched between a signal output or an error message
output. Switch S3 is used to enable or disable line fault detection of the field circuit. During an error condition, the relays revert to their deenergized
state and the LEDs indicate the fault according to NAMUR NE44. A unique collective error messaging feature is available when used with the Power Rail system.Pepperl+Fuchs isolated barrier KFD2-SR2-EX.1.W.LB


General specifications
Signal type Digital Input
Functional safety related parameters
Safety Integrity Level (SIL) SIL 2
Supply
Connection Power Rail or terminals 14+, 15-
Rated voltage Ur 20 ... 30 V DC
Ripple ≤ 10 %
Rated current Ir ≤ 50 mA
Power dissipation 1 W
Power consumption < 1.3 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 ≤ 0.1 mA , short-circuit I > 6 mA
Pulse/Pause ratio ≥ 20 ms / ≥ 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 error message ; relay
Contact loading 253 V AC/2 A/cos φ > 0.7; 126.5 V AC/4 A/cos φ > 0.7; 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

Pepperl+Fuchs isolated barrier KFD2-SR2-EX.1.W.LB

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