PEPPERL+FUCHS KFD2-EB2.R4A.B Redundant Power Feed Module

Overview

PEPPERL+FUCHS KFD2-EB2.R4A.B is a redundant power feed module for the Pepperl+Fuchs K-System Power Rail backplane, designed to supply 24VDC power to intrinsically safe barrier modules mounted on the Power Rail. KFD2-EB2.R4A.B supports dual-module redundant power arrangement, collective fault monitoring and RS485 bus pass-through, widely used in hazardous area process control systems. This PEPPERL+FUCHS KFD2-EB2.R4A.B is widely stocked as spare power feed module for industrial explosion-proof control assemblies.

Features

Pepperl+Fuchs KFD2-EB2.R4A.B Power Feed Module provides up to 4A output current to the Power Rail, equipped with a replaceable group fuse for rail-side overcurrent protection. The internal reverse diode enables two modules to be installed on one Power Rail for redundant supply, maintaining continuous power when one supply path fails.KFD2-EB2.R4A.B integrates collective fault evaluation and a reversible fault relay contact, which can be set as NO or NC to send fault alarm signal to PLC or DCS. Front panel green LED indicates power OK, red LED indicates fault condition including fuse failure and barrier rail fault. This module reserves bus terminals 13 and 15 to forward the Power Rail RS485 bus for KFD2-WAC2-Ex1.D communication modules. It adopts DIP switch configuration for fault relay logic, complies with NAMUR NE21 EMC requirement. It is DIN rail mounted, designed for 24/7 continuous operation in chemical, petrochemical and oil & gas hazardous control cabinets.

Specifications

PEPPERL+FUCHS KFD2-EB2.R4A.B Redundant Power Feed ModuleBrand: Pepperl+Fuchs Series: K-System Model: KFD2-EB2.R4A.B Type: redundant power feed module for Power Rail Input supply voltage: 20 ~ 30 VDC Max output current to Power Rail: 4 A Power dissipation: ≤ 2.4 W Fuse: 5 AT / 250 VAC replaceable fuse Fault relay contact rating: 30 VAC / 2 A; 40 VDC / 2 A Switching delay: approx. 20 ms energize / 20 ms de-energize Bus terminal: RS485 bus pass-through terminal Configuration: DIP switch for relay mode Indicators: green power LED, red fault LED Mounting: DIN rail, compatible with PR-05 / UPR-05 Power Rail Protection class: IP20 Ambient temperature: -25℃ ~ +60℃ Status: active spare for K-System intrinsic safety barrier rail

Principle

PEPPERL+FUCHS KFD2-EB2.R4A.B receives 24VDC control power and feeds stable power to the Power Rail backplane. This Redundant Power Feed Module monitors rail current and fuse status, and collects fault signals from all barrier modules on the rail. When fault occurs, the relay contact changes state and the red fault LED activates. Two units can work in redundant mode to avoid power loss on the safety barrier rail. The module also forwards the RS485 bus signal through dedicated terminals for fieldbus communication.

Applications

PEPPERL+FUCHS KFD2-EB2.R4A.B is deployed in chemical plants, refineries, natural gas stations and pharmaceutical hazardous area control systems. It supplies power to K-System intrinsic safety barriers for analog signals, solenoid valves and proximity sensors. PEPPERL+FUCHS KFD2-EB2.R4A.B is stocked as spare redundant power feed module for K-System hazardous area control assemblies.