Power failures can disrupt critical automation processes. Wiring Allen-Bradley 1606-XLE power supplies in parallel mode ensures redundancy, delivering uninterrupted 24V DC power for PLCs like CompactLogix. This guide walks you through the steps to achieve a robust, redundant power setup.
The Allen-Bradley 1606-XLE power supplies, like the 1606-XLE240E, support parallel operation to double current capacity or provide redundancy. In redundancy mode, if one unit fails, the other maintains power, ensuring high availability for automation applications.
Select Compatible Units: Use identical 1606-XLE models (e.g., two 1606-XLE240E, 24V, 10A) for consistent voltage and current.
Set Parallel Mode: On each power supply, locate the parallel mode jumper or switch (consult the manual). Set both to “Parallel Use” to balance load sharing.
Wire the Output: Connect the positive (+) terminals of both units to a common positive bus and the negative (–) terminals to a common negative bus using equal-length cables to ensure balanced current.
Add Redundancy Module: Use a 1606-XLRED redundancy module (e.g., 1606-XLRED20-30) between the power supplies and load to isolate faults and ensure seamless failover. (Optional)
Connect Input Power: Wire both units to the same AC input source (e.g., 100–240V AC), ensuring proper grounding.
Test the Setup: Power on both units, verify the DC OK signal, and test failover by disconnecting one unit to confirm the other maintains output.
Use cables of the same length and gauge to prevent voltage drops.
Check the 1606-XLE manual for model-specific settings.
Monitor diagnostics via the DC OK relay for maintenance.
Wiring Allen-Bradley 1606-XLE power supplies in parallel mode guarantees reliable power for your systems. Ready to set it up? Explore more about 1606 power supplies at Rockwell Automation’s website. Let Automation Ready Panels design and program your next control system today! Contact Us
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