The Pepperl & Fuchs KFD2‑SCD2‑Ex1.LK is a single-channel SMART current driver and isolated barrier designed for intrinsically safe 4–20 mA HART signal loops in hazardous-area installations. With high accuracy, SIL 2 certification, and line-fault detection, this module drives I/P converters, valve positioners, or SMART instruments while preserving bidirectional HART communication—ideal for high-end process control.

Key Features & Specifications

Model / P/N: KFD2‑SCD2‑Ex1.LK (295086)
Channel: 1-channel isolated barrier with ionomotive HART interface and SMART I/P driving capability
Power Supply: 19–30 V DC via K-System power rail or terminals; ≤30 mA draw
Output: 4–20 mA into 100–650 Ω load; field voltage ≥13 V @ 20 mA
Accuracy: Better than 0.1 % full scale; deviation <10 µA after calibration @ 20 °C
Diagnostics: Line-fault detection (open/short), red LED status, open-collector error output
Signal Bandwidth: Up to 3 kHz; rise time ≤10 ms (10–90 %)
Communication: Bidirectional HART/IP and valve-positioner transparency; includes integrated test sockets
Safety & Isolation: SIL 2 / SC 3 certified; ATEX Ex ia IIC, IECEx Zone 0/1/2, FM, UL; 300 V insulation rating
Mounting & Size: 20 × 124 × 115 mm, 115 g, DIN-rail mountable, IP20 housing, –40…+70 °C operating range

Pepperl &amp; Fuchs – KFD2-SCD2-Ex1.LK (295086) – SMART Current Driver, 1-Channel

Pepperl & Fuchs – KFD2-SCD2-Ex1.LK (295086) – SMART Current Driver, 1-Channel