Schneider Electric ABLU3A24200 Modicon 24 V 20 A 3-Phase Power Supply

Overview

The Schneider Electric ABLU3A24200 is a regulated switch mode power supply from the Modicon ABLU Universal range. It converts a three-phase 380 to 500 Vac line into a stabilised 24 Vdc output rated at 20 A, which equals 480 W, and it mounts directly on a 35 mm DIN rail. Schneider Electric designed the ABLU range to feed the control circuits of automation equipment such as logic controllers, PACs, I/O, sensors and actuators, and the range covers 120 W to 960 W in a single 124 mm height.

Many buyers still search for the older Phaseo ABL8WPS24200. Schneider Electric lists that reference as discontinued and states in its Modicon power supply catalog that it has been replaced by the Schneider Electric ABLU3A24200. Seven Star LLC supplies the new model to panel builders, system integrators, oil and gas operators, utilities and OEMs in the Sultanate of Oman and across the GCC, with engineering support from Muscat for anyone migrating from the ABL8WPS24200.

Operating Principle of the Schneider Electric ABLU3A24200

As a switch mode design, the Schneider Electric ABLU3A24200 rectifies the three-phase input, switches it at high frequency through an integrated isolation transformer and regulates the secondary to a DC voltage that the catalog states is precise to better than 3% whatever the load. The double insulation between the line side and the low-voltage output, together with internal circuitry that keeps the output below 60 V under single fault conditions, lets the unit supply PELV and SELV control circuits in line with IEC/EN 60364-4-41. The range also conforms to IEC/EN 61000-3-2 for harmonic current, so it can be connected to public low-voltage networks.

Two behaviours matter in daily operation. First, a power reserve (boost function) lets the supply deliver 1.5 times its nominal current for short periods; the instruction sheet gives a boost of 150% of nominal current for up to about 5 s, with recovery times that depend on the base load. This absorbs inrush from solenoid valves, contactor coils and capacitive loads without oversizing the supply. Second, the user chooses the reaction to overload or short circuit: in manual reset mode priority goes to voltage so PLC logic states are preserved, while automatic reset mode gives priority to current to keep the process running until maintenance arrives.

Engineering Design of the Schneider Electric ABLU3A24200

The front of the Schneider Electric ABLU3A24200 carries screw terminals for the three-phase input (L1, L2, L3 and earth), screw terminals for the DC output, cage clamp terminals for the volt-free diagnostic relay, a bicolour DC status LED, a protection mode selector and an output voltage adjustment potentiometer used to compensate voltage drop on long cable runs. A QR code printed on the front links to the latest technical documentation, and the printed circuit board carries a conformal coating to resist common dust and humidity. The catalog weight is 1.151 kg.

The diagnostic relay is rated 30 V AC/DC, 1 A resistive, and is usually wired to a PLC input so the control system knows when the DC output is healthy. The supply is approved for TN, TT and IT three-phase networks, and the Schneider Electric ABLU3A24200 can be combined with ABL8 functional modules such as the ABL8RED24400 redundancy module, ABL8BUF24400 buffer module and ABL8DCC DC/DC converters. For primary protection the catalog recommends TeSys Deca frame 2 breakers, GV2ME08 or GV2RT07 for this rating, and warns against smaller breakers that could trip on inrush.

Key Features of the Schneider Electric ABLU3A24200

The points below summarise what Schneider Electric documents for the Schneider Electric ABLU3A24200 in its catalog, instruction sheet and product page.

• Three-phase input from 380 to 500 Vac (-15% to +15%, 50/60 Hz) with a 24 Vdc, 20 A, 480 W output.
• Power reserve that delivers 1.5 times nominal current at regular intervals for loads with high inrush current.
• Selectable manual or automatic reset after output overload or short circuit.
• Integrated protection against overload, short circuit, overvoltage and undervoltage.
• Local diagnostics through a front LED and remote diagnostics through a volt-free relay contact.
• Conformal-coated circuit board and an operating range of -25 to +70 °C, with derating above 55 °C.
• Compatibility with Modicon functional modules for redundancy, buffering and auxiliary DC/DC voltages.
• Direct replacement path for the discontinued Phaseo ABL8WPS24200 named by Schneider Electric.

Industrial Applications

A 480 W, 24 V supply is the backbone of many control panels in Oman. The Schneider Electric ABLU3A24200 suits PLC and RTU cabinets on oil and gas wellsites and gathering stations, motor control centre auxiliary circuits, pump station panels in water networks, and control panels for reverse osmosis desalination plants where three-phase power is available but no neutral conductor is available. Schneider Electric lists the ABLU3A24 range for use with Modicon M221, M241, M251 and M262 controllers and Modicon M340 and M580 PACs, so it fits naturally beside a Modicon M221 compact PLC or a Modicon M241 logic controller.

For plants in Sohar, Duqm and Salalah that standardised on the ABL8WPS24200, the Schneider Electric ABLU3A24200 is the documented successor, which simplifies spare part planning and panel upgrades. Seven Star LLC supplies the Schneider Electric ABLU3A24200 on request with engineering support in Muscat, and can quote the recommended TeSys Deca GV2ME08 motor circuit breaker for upstream protection in the same order.

Technical Specifications

The values below for the Schneider Electric ABLU3A24200 come from the Schneider Electric Modicon power supply catalog (DIA3ED2170401EN), the ABLU instruction sheet (GEX54437) and the Schneider Electric product page.

How to Order

To order the Schneider Electric ABLU3A24200 or replace an existing ABL8WPS24200, send Seven Star LLC the quantity, your supply network details and any redundancy or buffer requirements. We will confirm the configuration, stock and lead time for Oman and the GCC, and the Schneider Electric catalog and instruction sheet are available to download on this page.