Pepperl+Fuchs KFD2-EB2.R4A.B | Redundant Power Feed Module

KFD2-EB2.R4A.B | Pepperl+Fuchs Redundant Power Feed Module

Product Overview

• Pepperl+Fuchs KFD2-EB2.R4A.B provides redundant power for Series KFD2 isolation barriers.
• It feeds up to 4 A through the Power Rail with dual input terminals for backup.
• This module fits hazardous areas: ATEX, FM, CSA, and IECEx for Class I, Div. 2 / Zone 2.
• Compact B2 housing (0.8 x 4.7 x 4.5 in) saves DIN‑rail space.

Key Technical Data

• Brand: Pepperl+Fuchs
• Model: KFD2-EB2.R4A.B (Redundant Power Feed Module)
• Input Voltage: 20 … 30 V DC (nominal 24 V)
• Output Current: max. 4 A (total for all plugged devices)
• Power Dissipation: ≤ 2.4 W
• Fault Relay: NO contact, 30 V AC / 2 A or 40 V DC / 2 A
• Switch Delay: approx. 20 ms (energize and de‑energize)
• Ambient Temp: -20 … +60 °C (-4 … +140 °F)
• Protection: IP20 (DIN‑rail mount per EN 60715)
• EMC: EN 61326‑1:2013 (industrial), NE 21:2006

Installation & Compatibility

• Mounts on 35 mm DIN rail according to EN 60715:2001.
• Plug directly onto the Power Rail for easy expansion.
• Compatible with all Pepperl+Fuchs KFD2 series isolators and transmitters.
• Use terminals 11+/12‑ for primary supply and 8+/9‑ for redundant input.

Maintenance & Diagnostics

• Relay output signals a fault if one supply fails.
• Fast 20 ms switchover ensures uninterrupted system power.
• Visual LED indicators for supply status and fault (on module front).
• No special tools needed for replacement; hot‑swap not supported.

Certifications & Safety

• ATEX: II 3G Ex nA nC IIC T4 (TUV 00 ATEX 1618 X)
• FM & CSA: Class I, Division 2, Groups A,B,C,D; Class I, Zone 2, IIC
• IECEx: Ex nA nC IIC T4 Gc (IECEx UL 16.0051X)
• UL approval for same hazardous locations.
• Control drawing 116‑0160 for reference.

Package Contents

• 1 × KFD2-EB2.R4A.B power feed module
• Instruction manual (multi‑language)
• Terminal labels and marking strips
• 12‑month warranty card

Shipping & Delivery

• Dispatch: 12‑24 hours from order.
• Carriers: FedEx, UPS, DHL express.
• Tracking available within 24 hours.

Expert Review

• “The KFD2-EB2.R4A.B is the go‑to redundant supply for Pepperl+Fuchs systems. Its 4 A capacity and ATEX/CSA approvals make it a safe choice for oil & gas. The relay fault output adds a layer of diagnostic confidence.” — Senior Instrument Engineer, PowergearX

Manager’s Insight

• “For plant reliability, this module eliminates single‑point failure. We recommend pairing it with two separate 24 V supplies. The compact B2 design lets you fit more channels per cabinet.” — Product Line Manager, Industrial Safety

Typical Applications

• Redundant power for KFD2 isolators in control cabinets.
• Hazardous area installations (Zone 2 / Div. 2) requiring backup.
• Systems that need fault relay for remote alarm.
• Retrofit existing Pepperl+Fuchs power rails.

Frequently Asked Questions

• What is the maximum output current?
• 4 A total for all modules on the Power Rail.

• Can I use this module with other brands?
• It is designed for Pepperl+Fuchs KFD2 series; compatibility with other brands is not guaranteed.

• How does the fault relay work?
• The relay de‑energizes when one input supply drops below 20 V.

• Is the module hot‑swappable?
• No, turn off power before removing or inserting.

• Experience tip: Use the terminals 8+/9‑ for the backup supply and set both supplies to the same voltage (24 V nominal).
• For ATEX installations, ensure the Power Rail is rated for the same hazardous area.

Selection Guide

• Choose KFD2-EB2.R4A.B if you need redundant 24 V power for up to 4 A load.
• For non‑redundant power, select KFD2-EB2.R4A (without “.B”).
• Check your total current: sum of all barrier currents must not exceed 4 A.
• For outdoor use, verify ambient temperature stays within -20 to +60 °C.

Contact Inquiries: sales@powergearx.com | +86 18030005825 (WhatsApp)

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