The Pepperl & Fuchs KFD2‑UFC‑EX1.D (P/N 188370) is a frequency-to-current converter with trip alarm functions, designed for intrinsically safe systems. It converts a digital input (from NAMUR sensors or dry contacts) into a proportional 0/4–20 mA analog output, plus relay and transistor alarm outputs. With SIL 2 certification and loop-powered design, it’s ideal for precision signal isolation and control in hazardous (Zone 2) environments.

Key Features & Specs

Model: KFD2‑UFC‑EX1.D (Pepperl & Fuchs 188370)
Input: 1 intrinsic-safe NAMUR/dry contact channel, 1 mHz–5 kHz frequency range; detects line faults (≤ 0.15 mA open / ≥ 6.5 mA short)
Output Channels:
1. Relay contact (2 A AC/DC)
2. Transistor output
3. Analog current: 0…20 mA or 4…20 mA, ≤650 Ω load, NAMUR NE43 fault signaling
Safety: SIL 2 (IEC/EN 61508‑11) certified; reinforced galvanic isolation (300 V RMS)
Power: 20–30 V DC via Power Rail or terminals; consumes ≤100 mA; low power dissipation (~2 W)
Configurable Functions: Start-up override (1–1000 s), trip thresholds, pulse divider, fault outputs; adjustments via keypads or PACTware
Diagnostics: LED indicators; collective error (Fault) output; RS‑232 programming jack
Mounting/Approvals: DIN-rail compatible IP20 housing; ATEX / IECEx / cULus approvals for Zone 2/Div 2; max temperature +60 °C

Pepperl &amp; Fuchs – KFD2-UFC-EX1.D (188370) – 1-Channel Frequency Converter Barrie

Pepperl & Fuchs – KFD2-UFC-EX1.D (188370) – 1-Channel Frequency Converter Barrie