What the 1606-XL480E Delivers for Legacy Control Panels

The Allen-Bradley 1606-XL480E is a legacy Bulletin 1606-XL switched-mode power supply rated at 480 W. It accepts AC 230 V nominal input and provides an adjustable DC output preset at 24.0 V, making it a direct fit for existing control cabinets that still rely on the XL platform.

Because This unit is officially discontinued, replacement planning matters. Rockwell's lifecycle announcement lists October 30, 2017 as the discontinuation date, and the 1606-XLE480EP as the direct replacement. PetroPartsOnline helps maintenance teams source remaining units or plan a controlled migration.

Key Features and Technical Specifications

• Rated power: 480 W continuous output for dense control loads.
• Input voltage: AC 230 V nominal (+15%/-20%); continuous operation AC 184...264 V or DC 270...370 V.
• Output voltage: DC 24...28 V adjustable, preset 24.0 V ±0.5%.
• Output current: 20 A at 24 V nominal, 18 A at 28 V, rated continuous at Tamb 0...60 °C.
• Efficiency: typ. 91% at AC 230 V, 24 V/20 A.
• Hold-up time: >20 ms at AC 230 V, 24 V/20 A.
• Ripple: <40 mVpp at AC 230 V input, 24 V/20 A.
• Inrush current: typ. 33 A at AC 264 V.
• Input current: 5 A at rated load, AC 230 V.
• Operating temperature: 0...+70 °C with derating above 60 °C.
• Storage temperature: -25 to +85 °C.
• Protection rating: IP20, DIN-rail open-frame construction.
• Dimensions (H×W×D): 124 × 220 × 102 mm; weight 1.8 kg.
• Terminals: 20...10 AWG (0.5...4 mm² stranded), tightening torque 0.8 Nm.
• Approvals: UL 60950-1 / cUL / CE marked.

This unit carries no communication interface or protocol, so it integrates as a pure power source. Its electronic current-limiting with hiccup overload behavior protects downstream loads during short circuits.

Problem-Solution: Addressing Thermal and Load Challenges

Problem: Control cabinets in oil and gas facilities often run hot, and power supplies derate silently. Solution: This unit delivers its full 20 A at 24 V up to 60 °C ambient. Above 60 °C, plan for derating per the datasheet. Mounting on DIN rail with adequate clearance supports airflow and extends service life.

Problem: Voltage sags and brownouts can reset PLCs and I/O. Solution: A hold-up time of >20 ms at AC 230 V, 24 V/20 A gives the control system time to ride through short interruptions. Combined with the wide AC 184...264 V input range, This unit tolerates typical grid fluctuations.

Problem: Ripple on the DC bus can disturb analog signals. Solution: Ripple is specified below 40 mVpp at full load, which supports stable operation of sensitive instrumentation.

Installation and Commissioning Guidance

Mount This unit on a standard DIN rail inside an enclosure rated for the environment. Use 20...10 AWG wire and tighten terminals to 0.8 Nm per Application Note 1606-AP016A. Verify the preset 24.0 V output before connecting loads, and adjust only within the 24...28 V range if the application requires it.

Because the unit has no communication port, no network configuration is needed. For cabinets with fieldbus networks, the power supply remains a separate DC source; confirm grounding and bonding practices with your panel builder.

Maintenance and Lifecycle Planning

Inspect This unit periodically for LED status, terminal tightness, and dust buildup. The DC OK status indicator and front-panel LEDs simplify troubleshooting. Since the series is discontinued, keep spare units or plan migration to the 1606-XLE480EP. PetroPartsOnline can help you verify current lifecycle status and availability before ordering.

Frequently Asked Questions

Is This unit still available for plc power supply module replacement?

This unit is officially discontinued as of October 30, 2017. For plc power supply module replacement, the direct replacement is the 1606-XLE480EP. Contact PetroPartsOnline to confirm remaining stock or migration options.

What is the input voltage range of This unit?

The Allen-Bradley unit accepts AC 230 V nominal (+15%/-20%), with continuous operation from AC 184...264 V or DC 270...370 V.

Can This unit output voltage be adjusted?

Yes. The output is adjustable from DC 24...28 V and is preset at 24.0 V ±0.5%.

What is the operating temperature limit of This unit?

This unit operates from 0...+70 °C, with derating required above 60 °C.

Does This unit support communication protocols?

No. This unit has no built-in communication ports or protocols; it functions solely as a power supply.

Contact PetroPartsOnline for parts suited to your application's requirements.

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