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

The Pepperl+Fuchs KFD2-EB2.R4A.B is a specialized power feed module engineered to provide a reliable 24 V DC supply to the Power Rail system. Specifically designed for hazardous locations classified as Zone 2 or Division 2, this device serves as a critical interface that ensures your isolators remain powered even in demanding industrial environments where explosive atmospheres may be present.

Built for maximum system availability, the KFD2-EB2.R4A.B supports redundant configurations to prevent single points of failure in power delivery. It features an integrated collective error messaging relay that instantly alerts controllers to device or wiring faults via a binary I/O point, while front-facing LEDs provide immediate visual diagnostics of power and fault status. The module's compact 20mm housing and 35mm DIN rail mounting make it an efficient addition to any control cabinet.

Key Features:

✅ ATEX, IECEx, and FM certified for Zone 2 / Div. 2 hazardous areas
✅ Redundant power supply configuration capability (requires two modules)
✅ IP20 rated housing for industrial protection
✅ RS-485 Bus forwarding for seamless communication integration
✅ Reversible relay contact output (NO/NC) for flexible fault signaling
✅ SIL-rated functional safety (provides no dangerous failures)
✅ 5 AT replaceable fuse with group fusing support
✅ Wide operating temperature range of -40°C to 60°C (-40°F to 140°F)
✅ Removable green screw terminals for easy installation and maintenance

📦 Package Options:

🔹 Standard Unit: KFD2-EB2.R4A.B single redundant power feed module
🔹 Redundant Kit: Two KFD2-EB2.R4A.B modules for full redundancy

KFD2-EB2.R4A.B Technical Specifications:

Feature	Details
Model	KFD2-EB2.R4A.B
Rated Voltage	20 to 30 V DC
Output Current	Max. 4 A
Power Dissipation	≤ 2.4 W
Fusing	5 AT / 250 V AC (Replaceable)
Fault Signal	Relay output (NO/NC reversible)
Contact Loading	30 V AC / 2 A or 40 V DC / 2 A
Response Time	Approx. 20 ms (Energized/De-energized)
LED Indicators	Green (Power), Red (Fault)
Ambient Temperature	-40 to 60 °C (-40 to 140 °F)
Housing Dimensions	20 x 119 x 115 mm (W x H x D)
Mounting	35 mm DIN Rail (EN 60715)
Hazardous Area Marking	II 3G Ex ec nC IIC T4 Gc
Protection Degree	IP20
Connection Type	Removable Screw Terminals

Certifications & Compliance:

🔗 ATEX (UL 22 ATEX 2853 X) – Certified for II 3G Ex ec nC IIC T4 Gc
🔗 IECEx (IECEx UL 16.0051X) – International certification for hazardous locations
🔗 FM 22 US 0031 X. Class 1 Division 2
🔗 IP20 – Protection against solid objects up to 12mm
🔗 Download Datasheet

Applications of Pepperl+Fuchs KFD2-EB2.R4A.B:

🔹 Oil & Gas
🔹 Chemical Plants
🔹 Mining
🔹 Labs
🔹 Manufacturing

What’s in the Box?

📦 1x KFD2-EB2.R4A.B Redundant Power Feed Module
📦 1x Replaceable 5 AT Fuse (Pre-installed)
📦 1x Set of Removable Screw Terminals
📦 1x Documentation Kit

Ordering & Shipping Details

📦 Lead Time: 3-5 business days (Standard Stock)
📍 Shipping Terms: Worldwide / Expedited Options
💳 Payment Options: Credit Card, PayPal, Net 30 Terms

Related Products:

🔗 Pepperl+Fuchs Power Rail UPR-03
🔗 KFD2-WAC2-Ex1.D Signal Conditioner
🔗 K-System Isolation Barriers

FAQs:

How many modules do I need for a redundant setup?
Redundant systems require two KFD2-EB2.R4A.B modules to ensure a secondary power source is available if one fails.

Can I change the fault relay behavior?
Yes, the relay can be configured as normally-open (NO) or normally-closed (NC) using the S1 DIP switch on the front of the device.

What is the maximum current output?
The module supplies a maximum current of 4 A to the Power Rail.

Does this device affect my SIL safety calculations?
No, the device provides no dangerous failures in terms of functional safety and does not influence the SIL value of the supplied isolators.