1606-XLSRED Diode Redundancy Module 480W Allen-Bradley

Allen-Bradley 1606-XLSRED Redundancy Module

Product Introduction

The 1606-XLSRED belongs to the Allen-Bradley Bulletin 1606-XL family. This diode redundancy module combines two 24 V DC power supplies into one redundant DC bus. Specifically, it supports 1+1 redundancy so a single supply failure never drops the load. Engineers install this unit where continuous uptime matters, such as control panels and process automation racks.

Technical Specifications

Each of the two inputs accepts DC 9…60 V with a nominal range of DC 12…48 V. Meanwhile, the combined output bus delivers DC 12…48 V nominal. The module handles 10 A nominal per input and 20 A nominal output, with a 25 A short-circuit maximum. Therefore, it pairs naturally with two 480 W-class supplies.

Diode decoupling isolates the two sources from each other. For instance, if one supply fails or shorts, the healthy supply keeps the bus energized. Additionally, the 800 mV voltage drop reflects the forward diode loss, so account for it when setting output voltages. Power losses reach 17.0 W at nominal load and 0 W at no load.

Spring terminals speed up wiring and resist vibration. However, the unit carries no communication ports or fieldbus protocols. Therefore, monitoring relies on the connected power supplies themselves.

Mechanical and Environmental Parameters

The housing measures 124 mm in height, 32 mm in width, and 102 mm in depth. Furthermore, the unit weighs only 0.29 kg, so it adds minimal DIN rail load. The IP20 rating suits open-frame DIN-rail cabinet construction. The manufacturer does not publish numeric operating, storage, or humidity limits for this module, so confirm application conditions with Rockwell documentation.

Installation Guide

First, mount the module on a DIN rail beside the two power supplies. Next, wire each supply output to a separate input using the spring terminals. Then connect the combined output bus to the load distribution. Additionally, keep input wiring short and equal in length to balance current sharing. Verify polarity carefully before energizing. Finally, set each supply output voltage to compensate for the 800 mV diode drop.

Packaging List

• 1 × 1606-XLSRED Diode Redundancy Module

• 1 × Installation Instructions

• Shipping via Fedex, UPS, DHL

FAQ

Q1: What is the function of the 1606-XLSRED?
A: It decouples two DC supplies for 1+1 redundancy on a combined 480 W bus.

Q2: What output current does this module support?
A: It delivers 20 A nominal output, with a 25 A short-circuit maximum.

Q3: How much voltage drop should I expect?
A: The diode path introduces approximately 800 mV, so raise supply setpoints to compensate.

Q4: Does this module have communication ports?
A: No, the 1606-XLSRED offers no communication interface or fieldbus protocols.

Q5: How is the module mounted?
A: It mounts on a DIN rail and uses spring terminals for input and output wiring.