PEPPERL+FUCHS KFD2-STC5-Ex2 Isolated Safety Barrier with 2 Independent Isolated Channels and HART Communication Support for SIL 2 Safety

I. Core Basic Information

Brand / Model: Pepperl+Fuchs KFD2-STC5-Ex2

Product Category: Isolated Safety Barrier (Transmitter Powered Type)

Number of Channels: 2 Independent Isolated Channels

Power Supply: 24 V DC Power Rail, or Terminal 14+/15 - Power Supply

Mounting: 35 mm DIN rail, 20 mm width (B2 housing)

Product Status: In Production, Regular Supply

Core Function: Powers 2/3-wire intelligent transmitters for hazardous areas, provides isolated transmission of 4–20 mA signals, supports HART bidirectional communication

Safety Certifications: ATEX, IECEx, SIL 2 (IEC 61508)

II. Key Technical Parameters

III. Functions and Features

• HART Communication: Built-in 250 Ω HART resistor (terminals 8/9, 11/12), supporting bidirectional HART communication and configuration.
• Test Points: Integrated test points on terminals for convenient on-site commissioning and measurement.
• Wide Temperature Range: Maximum operating temperature up to 70°C, suitable for high-temperature conditions.
• SIL 2 Safety Rating: Meets functional safety requirements, suitable for critical control loops.
• Plug and Play: No configuration required, works immediately upon power-up, supports 2/3-wire transmitters.

IV. Typical Application Scenarios

• Signal isolation and power supply for 4–20 mA smart transmitters (pressure, temperature, level, flow) in hazardous areas (Zone 0/1/2).
• Process control in explosion-proof environments such as chemical, petroleum, natural gas, and pharmaceutical industries.
• Signal isolation and HART communication between DCS/PLC systems and field instruments.