Pepperl Fuchs KFD2-EB2 Power Supply / System Module

Pepperl+Fuchs KFD2-EB2 Power Supply / Power Feed Module

 

 

The Pepperl+Fuchs KFD2-EB2 is a Power Feed Module (system power supply unit) used in DIN-rail Power Rail systems. Its main job is to feed 24 VDC system power into Pepperl+Fuchs signal conditioners and isolators, while also providing fault monitoring and system-wide power distribution.

It is commonly used in signal conditioning cabinets and intrinsically safe (Ex) instrumentation systems.

Core Function

The KFD2-EB2 acts as:

• 24 VDC power injector for Power Rail systems
• Power distributor for multiple isolators / signal conditioners
• System fault monitoring module (via relay output)

Key Technical Data (confirmed)

• Supply voltage: 20–30 VDC
• Max output current: up to 4 A on Power Rail
• Power consumption: ≤ 1 W
• Mounting: 35 mm DIN rail
• Operating temperature: approx. -40°C to +70°C
• Protection: IP20
• Interface: Power Rail system connector

Main Features

• Supplies stable 24 VDC power to entire isolator rack
• Built-in replaceable fuse (protection for Power Rail)
• Relay alarm output for system fault indication
• LED status indicators (power / fault)
• Supports redundant power configurations
• Compatible with all Pepperl+Fuchs Power Rail modules

System Role (Important)

In a typical cabinet setup:

Field transmitters → signal isolators (KFD2 series) → PLC/DCS
⬆
All isolators are powered by KFD2-EB2 via Power Rail

So this module is essentially the “power backbone” of the entire signal conditioning system.

Application Areas

• Oil & gas instrumentation systems
• Chemical & petrochemical plants
• Power plants
• Offshore platforms
• Hazardous area (Ex zone) control cabinets
• 4–20 mA signal isolation systems
• DCS/PLC analog signal interfaces

Advantages

• Centralized power distribution simplifies cabinet wiring
• Improves reliability of multiple isolator modules
• Fault relay helps quick system diagnostics
• Industrial-grade design for continuous operation
• Supports safety and Ex-rated system architectures

Precautions

• Must use correct 24 VDC regulated power supply (20–30 VDC range)
• Do not exceed 4 A total Power Rail load
• Proper grounding required for stable signal integrity
• Follow Ex system installation rules in hazardous areas
• Replace fuse only with specified rating type