Pepperl+Fuchs KFD2-STC5-Ex2 | 2-Channel SIL2 Transmitter Supply

Pepperl+Fuchs KFD2-STC5-Ex2 | 2-Channel SMART Transmitter Power Supply – Part No. 203645

Overview

The Pepperl+Fuchs KFD2-STC5-Ex2 (203645) is a 2-channel isolated barrier and transmitter power supply, designed to interface with 2-wire SMART transmitters or current sources located in hazardous areas. It safely transmits analog signals (4–20 mA) to the safe area, and supports bidirectional HART communication.

Engineered for use in SIL 2 (SC 3) safety-related systems per IEC/EN 61508, this unit provides galvanic isolation and DIN rail mounting for ease of integration in process automation environments.

Key Features

• Manufacturer Part Number: 203645

• Channels: 2 isolated input/output channels

• Input: 2-wire SMART transmitters or current sources (Hazardous Area)

• Output: Active 4–20 mA current signals (Safe Area)

• Power Supply: 20–30 V DC

• HART Compatibility: Bidirectional digital communication supported

• SIL 2 Certified (SC 3) – Per IEC/EN 61508

• Galvanic Isolation: 3-way isolation between input, output, and power supply

• Mounting: DIN rail, 20 mm housing width

• LED Indicators: Status and fault diagnostics

Technical Specifications

• Model: KFD2-STC5-Ex2

• Part Number: 203645

• Input Signal: From SMART or 2-wire transmitters

• Output Signal: 4–20 mA (active)

• Supply Voltage: 24 V DC nominal (20–30 V range)

• Housing Width: 20 mm

• Temperature Range: –20 °C to +60 °C

• Protection Rating: IP20

• Isolation Voltage: 375 V AC

• Compliance: ATEX, IECEx, UL, CSA, CE

• Functional Safety: SIL 2 (SC 3) certified

Applications

• Chemical and Petrochemical Plants – Intrinsically safe transmitter integration

• Oil & Gas Facilities – Reliable analog signal transmission

• Water & Wastewater Treatment – Transmitter interface in remote I/O

• Pharma and Food Processing – Compact SIL-compliant automation

• General Process Control – Signal isolation for HART-enabled transmitters

Why Choose the KFD2-STC5-Ex2 (203645)?

• 2 channels in a compact 20 mm housing

• Fully SIL 2 certified with HART compatibility

• Reliable analog signal transmission from Ex zones

• Pepperl+Fuchs quality and durability for demanding environments

Order Now

Pepperl+Fuchs KFD2-STC5-Ex2 (203645) is in stock and ready for global shipping. 

NEW product in original sealed packaging. The product may be of older version or design. The packaging may have markings, signs of discoloration, and wear. DDPARTSSOLUTION Warranty: 1 Year. Manufacturer's Warranty and Support NEVER apply