Allen-Bradley 1606-XLP72E AC/DC Compact Power Supply

Configured for power distribution in industrial control cabinets, the Allen-Bradley 1606-XLP72E (1606-XLP72E AC/DC Compact Power Supply) provides direct physical/electrical execution of voltage conversion and regulation for 24-28 VDC instrumentation and control logic.

Hardware Specifications

DIN-rail Mounting Stability

The 1606-XLP72E is designed for standard 35 mm DIN-rail mounting, ensuring mechanical stability under industrial vibration profiles. The internal circuitry provides surge voltage protection limits necessary to safeguard downstream PLC and I/O components from grid-side transients. As a switch-mode power supply, the unit maintains efficiency across varying load conditions, with protocol conversion latencies non-applicable due to its dedicated power-stage architecture. Proper thermal clearance must be maintained to ensure the internal power semiconductor junctions remain within the specified derating curves at elevated ambient temperatures.

Frequently Asked Questions (FAQ)

Q: What is the required clearance for proper convection cooling?

A: To ensure adequate passive cooling, maintain a minimum of 25 mm clearance on the top and bottom of the unit and 10 mm on each side. Improper spacing can lead to thermal shutdown or reduced service life of electrolytic capacitors.

Q: Can this power supply be connected in parallel for redundancy?

A: The 1606-XLP72E is not inherently designed for direct parallel operation to achieve current sharing. If redundancy is required, use an external diode or redundancy module to prevent reverse current flow into the power supply output stage.

Field Installation Guidelines

• Mounting: Snap the unit onto the 35 mm DIN-rail. Ensure the rail is clean and free of paint or oxidation to facilitate a low-impedance connection if the unit relies on the rail for grounding purposes.

• Wiring: Use copper conductors rated for 75 deg C or higher. Ensure wire ferrules are used for stranded conductors to prevent strand splaying, which can cause short circuits between adjacent terminals.

• Grounding: Connect the protective earth (PE) terminal to the cabinet ground bus. Failure to properly earth the unit will negate the internal electromagnetic compatibility (EMC) filters and increase leakage current on the DC output.

• Voltage Setting: The output voltage can be adjusted between 24 and 28 VDC via the front-panel potentiometer. Use an isolated digital multimeter to verify the output voltage at the load end to account for any potential voltage drop across the conductors.