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Industrial Power Supplies Explained | Allen-Bradley 1606 Series Guide

By DANIEL GOMES April 30, 2025

Understanding Industrial Power Supplies: SMPS and the Allen-Bradley Bulletin 1606 Series

In industrial automation, a stable and efficient power supply is essential for the performance and longevity of control systems. From PLCs and HMIs to sensors and servo drives, every component depends on consistent power delivery. At PLCpartssolution, we offer a wide range of multibrand industrial power supplies, including Allen-Bradley's trusted Bulletin 1606 series.

This blog will guide you through the fundamentals of Switched Mode Power Supplies (SMPS) and explore the differences between the 1606-XLE, XLP, XLS, and Special Modules.

What Is a Switched Mode Power Supply (SMPS)?

A Switched Mode Power Supply is an electronic power conversion device that uses high-frequency switching to convert electrical power efficiently. Compared to linear power supplies, SMPS units are more compact, energy-efficient, and suitable for variable input conditions.

Benefits of SMPS:

  • High efficiency (typically 85–95%)

  • Smaller size and weight

  • Lower heat generation

  • Wide input voltage ranges

  • Built-in protection features such as short-circuit and overload protection

Allen-Bradley Bulletin 1606 Power Supply Families

Allen-Bradley's Bulletin 1606 series includes several product families tailored to different industrial needs, from cost-effective basics to high-performance solutions.

Bulletin 1606-XLE: Essential Switched Mode Power Supplies

The 1606-XLE series offers a solid balance of performance and cost for standard applications. These power supplies are reliable and suitable for most general automation environments.

Key Features:

  • Wide input voltage range: 85–264V AC

  • Power boost: 120% for short durations

  • Overload and short-circuit protection

  • DIN rail mounting

  • Output ratings up to 10 A

Common Applications:

  • Basic control panels

  • Entry-level automation systems

  • Machine builders seeking cost-effective power options

Bulletin 1606-XLP: Compact Switched Mode Power Supplies

The 1606-XLP series is designed for compact installations, ideal when panel space is limited. Despite their small footprint, they maintain solid electrical performance.

Key Features:

  • Ultra-compact design for small control cabinets

  • Universal input: 85–264V AC

  • Low inrush current

  • Efficient thermal management

  • Output ratings from 1.3 A to 4.2 A

Common Applications:

  • OEMs and integrators with tight panel constraints

  • Space-limited control systems

  • Cost-conscious applications with minimal load

Bulletin 1606-XLS: Performance Switched Mode Power Supplies

The 1606-XLS series is built for high-demand environments where reliability and power availability are mission-critical.

Key Features:

  • High power reserves: 150% power boost

  • Active power factor correction (PFC)

  • Advanced diagnostics and monitoring

  • Extended temperature ranges

  • Parallel operation for load sharing

Common Applications:

  • High-performance automation lines

  • Redundant power systems

  • Industrial processes with critical uptime requirements

Bulletin 1606 Special Modules

In addition to standard power supplies, Allen-Bradley also offers Special Modules in the 1606 line to enhance functionality and system protection.

Examples include:

  • Redundancy modules

  • Buffer modules

  • DC-UPS modules

These accessories help maintain uninterrupted operations during voltage drops, load spikes, or power outages.

Choosing the Right Power Supply

When selecting a power supply, consider:

  • Total current load

  • Available panel space

  • Environmental conditions (temperature, vibration, etc.)

  • Redundancy or backup requirements

  • Future scalability

At PLCpartssolution, we help you find the ideal power supply for your industrial control system. Whether you need a compact model for a tight space or a high-performance unit for demanding conditions, we have options from Allen-Bradley and other leading brands.

Why Buy from PLCpartssolution?

  • Multibrand inventory in stock and ready to ship

  • Competitive pricing on new and surplus equipment

  • Fast worldwide delivery

  • Expert support for part selection and compatibility

We stock and ship a wide range of power supplies, including the full Allen-Bradley 1606 series. Get the performance your system demands—reliably and affordably.

Frequently Asked Questions

What is the difference between the 1606-XLE, XLP, and XLS series?
The XLE offers essential performance at a cost-effective price, the XLP is designed for compact spaces, and the XLS delivers high-end performance with advanced features.

Can I connect multiple power supplies in parallel?
Yes, the 1606-XLS series supports parallel operation with proper configuration for load sharing.

Do Allen-Bradley power supplies support global voltages?
Yes, most 1606 models support wide input ranges from 85–264V AC, making them suitable for international applications.

Where can I buy Allen-Bradley power supplies?
You can request a quote directly from PLCpartssolution. We offer fast quotes, excellent pricing, and global shipping.

Need help choosing the right power supply? Contact our team at PLCpartssolution for expert guidance.

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