Pepperl+Fuchs KFD2-SOT3-EX1.LB Switch Amplifier

Manufacturer: Pepperl+Fuchs
Product Numbers: KFD2-SOT3-EX1.LB
Product Type: Compact Controller Module
Place of 0rigin: Germany
Power dissipation: ≤  1 W including maximum power dissipation in the output
Connection side: field side
Connection: terminals 1+, 2+, 3-
Rated values: acc. to EN 60947-5-6 (NAMUR), see manual for electrical data
Open circuit voltage/short-circuit current approx.: 10 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 ≥ 6.5 mA
Pulse/Pause ratio min.: 100 µs / min. 100 µs

The Pepperl+Fuchs KFD2-SOT3-EX1.LB is a 1-channel isolated barrier compact module designed for intrinsic safety signal transmission between hazardous and safe areas. It supports NAMUR sensors or dry contact inputs, converting field-side digital signals into two passive transistor outputs with non-polarized configuration. The device is designed according to EN 60947-5-6 (NAMUR) standards and operates with a 10 V DC open circuit voltage and approximately 8 mA short-circuit current, ensuring reliable signal detection and stable switching performance.
The module features line fault detection, reversible operating modes, and configurable output behavior, allowing flexible system integration. It operates with a power dissipation of ≤1 W and supports switching point thresholds between 1.2–2.1 mA with approximately 0.2 mA hysteresis. The KFD2-SOT3-EX1.LB includes LED indication compliant with NAMUR NE44 standards for fault signaling and provides a collective error output for diagnostics. With SIL 2 (SC 3) certification according to IEC/EN 61508, it is suitable for safety-related industrial applications requiring reliable isolation and signal integrity.

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