Pepperl & Fuchs – KFD0‑CS‑Ex1.51P (72147) – 1‑Channel Intrinsically-Safe 4–20 mA

The Pepperl & Fuchs KFD0‑CS‑Ex1.51P is a loop-powered, single-channel isolated barrier designed for intrinsically-safe 4–20 mA applications. It transfers signals from hazardous-area sensors—such as fire alarms or temperature probes—to safe-area instrumentation while providing transmitter power, reverse-polarity protection, and SIL 2 safety integrity. Ideal for reliable signal conditioning in Zone 0–2 / Div 1–2 environments.

Key Features & Technical Specifications:

• Model: KFD0‑CS‑Ex1.51P (72147)  

• Signal Type: 0–40 mA input/output, loop-powered (4–35 V DC)  

• Accuracy: 1% (≤200 µA deviation after calibration at 20 °C)  

• Transmitter Supply: ≥21 V at 20 mA; short-circuit current ≤65 mA  

• Safety: SIL 2 / SC 3 per IEC/EN 61508; reverse-polarity protected  

• Isolation: 375 V peak galvanic barrier between field and control circuits  

• Power Dissipation: 700 mW (<22 V input) or 1.2 W (>22 V input)  

• Mounting: DIN-rail 35 mm; 20 × 107 × 115 mm; IP20; –20…+70 °C  

• Certification: ATEX (Ex ia), IECEx, UL/cUL, FM; Zone 0/1/2, Div 1/2 compliance