ABB LWN2660-6E Power Supply

The ABB LWN2660-6E, also cataloged as the LWN2660-6E Power Supply, operates as a dedicated hardware component for AC-DC and DC-DC regulated power conversion within control cabinets and industrial drive racks. Receiving a wide input voltage range of 100-240 VAC or 90-350 VDC, the unit delivers dual 24.7 VDC outputs up to 5 A to drive logic circuits, relay coils, and auxiliary controller components.

Suffix Breakdown & Model Matrix

Hardware Specifications

Control Backplane Power Integration and Voltage Stabilization

The ABB LWN2660-6E incorporates dedicated line filter stages and high-frequency switching regulation designed to isolate control logic from input line transients and maintain backplane bus communication velocity. The stabilized dual 24.7 VDC rail output reduces voltage ripple and suppression noise spikes across downstream processing cards, supporting predictable frame processing on Profinet and EtherNet/IP deterministic networks. Full firmware flash compatibility across host system controllers is preserved by preventing voltage dropouts during peak load step responses across scalable I/O networks.

Frequently Asked Questions

Q: Can the LWN2660-6E power supply accept a DC input voltage source directly?

A: Yes. The input stage accepts wide-range DC voltage between 90 VDC and 350 VDC, in addition to standard single-phase AC line voltage ranging from 100 VAC to 240 VAC at 50/60 Hz.

Q: What is the maximum load current available on the 24.7 VDC output terminals?

A: The switching supply delivers a continuous maximum output current rating of 5 A at 24.7 VDC to power connected auxiliary logic and field devices.

Field Installation Guidelines

1. Power Isolation: Verify that the main AC or DC incoming supply lines are completely de-energized and locked out prior to connecting input wiring to the LWN2660-6E screw terminals.
2. DIN-Rail Mounting Stability: Clip the base bracket securely onto a standard 35 mm DIN-rail. Ensure top and bottom latching pins fully snap into position to verify physical stability under industrial vibration conditions.
3. Wire Termination & Polarities: Strip wire ends to the recommended length. Verify correct phase, neutral, or DC voltage polarity on the input terminals, and maintain correct polarity alignment on the dual 24.7 VDC output connections.
4. Thermal Ventilation: Maintain a minimum clear vertical distance of 50 mm above and below the power supply housing to allow natural convective airflow and prevent heat buildup during full-load operation.