Allen-Bradley 1606-XLERED Redundancy Module

Allen-Bradley 1606-XLERED 24V 20A Diode Redundancy Module

Product Introduction

The 1606-XLERED is a dual-input diode redundancy module from the Allen-Bradley Bulletin 1606-XL series. It decouples two independent DC power sources to build 1+1 redundant architectures in industrial control panels. Consequently, if one supply fails, the second source continues feeding the load without interruption. Engineers commonly deploy this module in process automation, safety systems, and continuous-production lines where downtime is costly.

Technical Specifications

The module accepts a DC input voltage range of 18 to 60 V. Each input carries a nominal current of 10 A, and the unit combines both channels into a 20 A nominal output. A short-circuit condition can push output current to 25 A maximum. Output voltage spans 24 to 48 V DC nominal, matching the input source rating.

Diode decoupling isolates the two inputs from each other. Additionally, the nominal voltage drop measures 780 mV, which engineers should factor into load voltage budgets. Approvals include UL 60950-1, cUL, and CE marking under the official Bulletin 1606 series standard.

No communication ports or protocols exist on this device. Specifically, it performs purely electrical decoupling with no data interface.

Mechanical and Environmental Parameters

Dimensions measure 124 mm (H) × 32 mm (W) × 117 mm (D), and the unit weighs 350 g. Housing is a DIN rail mount construction rated IP20. Operating temperature spans -40 to +70 °C, suitable for harsh industrial environments. Storage temperature and relative humidity values are not published for this model.

Installation Guide

First, mount the 1606-XLERED on a standard DIN rail inside the control enclosure. Next, wire each power supply to a separate input terminal and confirm polarity. Then connect the combined output to the load bus. Meanwhile, verify input voltages fall within the 18 to 60 V DC range before energizing. Finally, check the output voltage after power-up and account for the 780 mV drop when setting supply levels. In addition, keep wiring short to minimize additional losses.

Packaging List

• 1 × Allen-Bradley 1606-XLERED redundancy module

• 1 × Installation instruction sheet

• Shipping via Fedex, UPS, DHL

FAQ

Q1: What is the purpose of the 1606-XLERED?
A: It decouples two DC power supplies for 1+1 redundancy, so one failed source does not interrupt the load.

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

Q3: How much voltage drop should I expect?
A: The nominal drop is 780 mV, which you should include in your voltage budget.

Q4: Does it have any communication interface?
A: No. The 1606-XLERED offers no ports or protocols; it is purely an electrical decoupling device.

Q5: Is the 1606-XLERED still active?
A: Yes. Rockwell lists it as active in Bulletin 1606-TD002H (July 2023) technical data.