Pepperl+Fuchs isolated barrier KFD2-SR2-Ex1.W

Pepperl+Fuchs isolated barrier KFD2-SR2-Ex1.W

Switch Amplifier KFD2-SR2-Ex1.W

Pepperl+Fuchs isolated barrier KFD2-SR2-Ex1.W
Features
• 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 acc. to IEC 61508/IEC 61511

Pepperl+Fuchs isolated barrier KFD2-SR2-Ex1.W


Function
This isolated barrier KFD2-SR2-Ex1.W is used for intrinsic safety applications. It transfers digital signals (NAMUR sensors/mechanical contacts) from a hazardous area to a safe area.Pepperl+Fuchs isolated barrier KFD2-SR2-Ex1.W
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, the relay reverts to its de-energized 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.

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 ≤ 30 mA
Power dissipation 0.7 W
Power consumption < 0.9 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 terminals 7, 8, 9
Output signal ; relay
Pepperl+Fuchs isolated barrier KFD2-SR2-Ex1.W

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