Schneider Electric ABL8RED24400 40 A Redundancy Module

ABL8RED24400: 40 A redundancy module for 24 V DC supplies

The ABL8RED24400 is not a power supply itself but a redundancy module from the Schneider Electric Phaseo range. It combines the outputs of two 24 V DC power supplies onto one load rail, so that the failure of one supply does not interrupt the load. The datasheet lists a maximum output current of 40 A, an input voltage of 24–28.8 V DC and an output of (Uin − 0.2) V DC, meaning the unit drops only about 0.2 V. Seven Star LLC supplies the ABL8RED24400 in Oman and the GCC as an independent supplier based in Muscat.

In the reference, ABL8 is the Phaseo prefix, RED stands for the redundancy function in our reading, and 24400 corresponds to 24 V and 40 A. The datasheet remains the reference for ordering.

Pairing the ABL8RED24400 with Phaseo supplies

The datasheets of the ABL8RPS, ABL8RPM and ABL8WPS supplies name this module as the way to improve availability by connecting supplies in parallel. The Phaseo references that fit the 24 V input window are ABL8RPS24030 (3 A), ABL8RPS24050 (5 A), ABL8RPM24200 (20 A) and ABL8WPS24400 (40 A); the redundant current you can count on is that of one supply, up to the 40 A limit of the module. Use two identical supplies, keep each module input inside the 22–30 V limit, and fit the same cable length to each so they behave alike.

Where redundancy matters in Oman and the GCC

A redundant 24 V rail is typical for plants where a lost control supply means a lost process: desalination and water-treatment plants, oil and gas skids, compressor stations and power substation automation. In such installations the two supplies are often fed from independent sources, for example a UPS and a mains feeder, so that a single failure does not take down the controller. The ABL8RED24400 is the small, passive component that makes this practical, and it should be fitted next to the supplies it serves so that cable drop is minimal. Regional heat means the module and the supplies need ventilated enclosures; check the module rating of −25–60 °C against real cabinet temperatures.

Selecting the ABL8RED24400: checklist

• Confirm that both supplies output 24–28.8 V DC and that the module input limit of 22–30 V is respected.
• Size each supply for the full load so one unit can carry it alone, up to the module limit of 40 A.
• Decide whether the status relay should be wired to a PLC alarm input.
• Allow for the 0.2 V drop across the module when the load is voltage-sensitive.
• Plan equal cable lengths from each supply and enough terminal capacity for the currents involved.

Standards and test levels listed for the ABL8RED24400

The datasheet quotes electrostatic discharge to IEC 61000-4-2, emission to IEC 61000-6-3, induced electromagnetic field to IEC 61000-4-6 level 3, radiated field to IEC 61000-4-3 level 3, fast transients to IEC 61000-4-4 level 3, surge to IEC 61000-4-5 level 2 and conducted and radiated emissions to EN 55022 class B. Safety references are IEC 60950-1 and EN/IEC 61204, with CSA C22.2 No 60950-1 and UL 508 listed under standards and EAC and RCM under certifications. Vibration resistance is 3.5 mm between 3 and 11.9 Hz and 2 gn between 11.9 and 150 Hz to IEC 61131-2, dielectric strength is 500 V between input and ground and between output and ground, and the reliability figure is an MTBF of 2488391 hours at 24 V DC by the UTE C80-810 method.

Wiring, mounting and monitoring of the ABL8RED24400

The module clips onto a 35 mm DIN rail and can be mounted horizontally or vertically. Terminals are screw type: 4 × 0.5–4 × 10 mm² (20–8 AWG) for the inputs, 2 × 0.5–2 × 10 mm² for the output, and a removable terminal block for the diagnostic relay (1 × 2.5 mm², 14 AWG). A green LED per input shows that each supply is present, and the relay gives a remote contact for supply status, so a PLC can raise an alarm when one source drops out. The weight is 0.7 kg, protection is IP20 conforming to IEC 60529, and the unit is rated for operation at −25–60 °C and storage at −40–85 °C. Use short, equal-length, correctly sized cables between the supplies and the module; with 40 A flowing, voltage drop and loose screws are the usual cause of trouble.

ABL8RED24400 technical data

How the ABL8RED24400 combines two supplies

The housing marks two inputs, Uin 1 and Uin 2, and the datasheet lists one output channel with parallel coupling and an output voltage of (Uin − 0.2) V DC. In general terms, a redundancy module of this kind isolates the two sources from each other so that a failed or switched-off supply does not pull down the rail; the datasheet’s internal wiring diagram shows the exact arrangement.

The datasheet lists an input current of 20 A and a maximum output current of 40 A. The practical rule for redundancy is that each supply must be able to carry the full load alone, so size every supply for the whole current, not half of it. This unit does not protect the output itself: the datasheet states that overload and short-circuit protection is external, supplied by the power supplies feeding it.

Information to send with an RFQ for the ABL8RED24400

• Reference ABL8RED24400 and quantity.
• Models and ratings of the two 24 V supplies it will join.
• Total load current and the acceptable voltage drop.
• Whether the diagnostic relay will be wired to an alarm.
• Delivery location and required date.

Documents and quotation

The manufacturer datasheet for the ABL8RED24400 is attached on this page and carries the complete specification set, including the dimension drawings and the derating information. Compare the datasheet revision with your project documents before you freeze a bill of materials.

Send us the reference ABL8RED24400, the quantity and the delivery location, and Seven Star LLC will reply to your request for quotation. We work as an independent supplier based in Muscat and serve customers across Oman and the GCC.