Pepperl Fuchs KFD2-EB2.R4A Power Feed Module

Description Is your safety-instrumented system or high-density I/O cabinet suffering from intermittent power drops due to a lack of redundant supply monitoring? The Pepperl Fuchs KFD2-EB2.R4A is a critical infrastructure component for the K-System lineup. It does not process signals itself; rather, it provides a centralized power entry point for the Power Rail (UPR-03), while simultaneously monitoring for power failures and collective error messages from all other modules on the rail. Inventory Status and Commercial Logistics Product Condition: New Original (Factory Sealed). Availability: In stock at global distribution centers; ships within 24–48 hours. Lead Time: 1 to 3 business days for global express delivery. Warranty Protection: 12-month standard industrial warranty. Commercial Note: The listed price is for general procurement budgeting. Actual final pricing is subject to fluctuating component costs and international shipping rates. Contact our trade desk for an official project quotation. Technical Specifications and Operational Intelligence In field deployments, the KFD2-EB2.R4A is often paired with a second feed module to create a fully redundant power architecture for a DIN rail of up to 75 modules. Core Electrical Parameters Parameter Technical Value Model Designation KFD2-EB2.R4A Input Voltage Range 20 V DC to 30 V DC Output Current 4 A (Maximum) Fault Output 1 Relay (Normally Closed Contact) Switching Capacity 30 V DC / 1 A Redundancy Supported via dual-feed configuration Indicators Green LED (Power), Red LED (Fault) Mounting 35 mm DIN-rail / Power Rail UPR-03 Diagnostic and Monitoring Functions The “R4A” designation indicates the inclusion of a relay contact for remote fault signaling. Power Monitoring: The module continuously checks the voltage level of the incoming 24 V DC. If the voltage drops below 19 V, the fault relay changes state. Collective Error Messaging: Every module on the Power Rail has a “Fault” pin. If any individual isolator or converter on that rail detects a wire break or sensor short, it sends a signal to the KFD2-EB2.R4A, which then trips the central fault relay for the PLC to read. Global Procurement and Customs Compliance Notes As this module is a fundamental component of “Active Isolation” systems, it is subject to standard international trade regulations for industrial electrical equipment. Regulatory and Trade Classifications US ECCN: EAR99 (No specific export license required for most commercial sites). HS Code: 85437090 (Electrical apparatus with individual functions). Safety Ratings: SIL 2 (IEC/EN 61508) compliant when used in safety-related monitoring paths. Country of Origin: Typically Germany or Singapore; verified on the physical unit for Certificate of Origin (COO) accuracy. Shipping and Logistics We offer FCA (Free Carrier) and DAP (Delivered at Place) terms. For emergency facility repairs, we utilize priority air freight (DHL/FedEx). At a net weight of approximately 100 g, these modules are exceptionally cost-effective to ship globally in bulk. We use specialized ESD-safe packaging to prevent static discharge from damaging the sensitive gold-plated spring contacts on the base of the module. Engineering Notes for Field Deployments Important Installation Note: When installing the KFD2-EB2.R4A onto the Power Rail, ensure the gold contacts are clean and the module is seated perfectly vertically. A slanted insertion can bend the Power Rail pins, causing a short circuit that can potentially shut down the entire 4 A bus. Well, technically you only need one feed module to power a rail, but we strongly recommend using two (one at each end). This allows you to feed from two separate 24 V power supplies. To be frank, if one power supply fails, the KFD2-EB2.R4A will maintain the rail voltage while the fault relay alerts the control room that you’ve lost redundancy. On a recent project in a refinery, we found that field technicians were confused by the “R4A” relay behavior. It is a “Normally Closed” (NC) contact that is held open when power is healthy. This means that if the module itself loses power, the contact closes, providing a “Fail-Safe” signal to the DCS. Don’t underestimate the importance of this—if you wire it as a standard NO contact, you may miss a total power loss event. Frequently Asked Questions What is the difference between the KFD2-EB2 and the KFD2-EB2.R4A? The standard EB2 module is a “blind” power feed that provides current to the rail but has no monitoring relay. The R4A version includes the relay and the internal logic to monitor the collective error line from the other modules on the rail. How many modules can one KFD2-EB2.R4A power? One module can supply up to 4 A of current. For most K-System modules (which draw between 40 mA and 60 mA), this allows for approximately 60 to 75 modules on a single rail segment. Always perform a total current calculation if you are using high-power consumption modules like solenoid drivers. How do I request an official quote for international delivery? Submit your inquiry with the quantity required and your full delivery address. Our logistics team will generate a pro forma invoice within 24 hours, including HTS codes and estimated transit times for your customs broker. Are you planning to utilize the Power Rail for collective error messaging, or just for 24 V power distribution? PEPPERL FUCHS 2082|Industrial Signal Converter PEPPERL FUCHS 2108HAT|Fieldbus Isolator and Signal Converter Pepperl Fuchs KFD2-CR4-1-2O Transmitter Power Supply