Schneider Electric ABLS1A24021 24 V 2.1 A Power Supply

ABLS1A24021: 24 V DC regulated power supply, 2.1 A (50 W)

The ABLS1A24021 is an optimised DIN-rail supply in a plastic housing 30 mm wide. It is a regulated switch mode power supply from Schneider Electric’s Modicon Power Supply offer that delivers 24 V DC at 2.1 A, equal to 50 W. Schneider Electric lists it as the Optimized variant of the family, a slim unit that clips onto the standard rail. Seven Star LLC supplies the ABLS1A24021 in Oman and the GCC as an independent supplier based in Muscat.

The reference follows a family pattern: ABL is the power supply prefix, the letter S names the style (optimized), the characters 1A a series code that we do not decode, 24 the output voltage in volts and 021 the output current in tenths of an amp (here 24 V and 2.1 A, rounded). This is our reading of the pattern; the datasheet is the authority for ordering.

The ABL Modicon power supply family around the ABLS1A24021

The thirteen references below share a 12 V, 24 V or 48 V output and differ in style, power and size.

Output, ripple and protection of the ABLS1A24021

The ABLS1A24021 delivers 24 V DC at 2.1 A, adjustable over 24–28 V. At 80 % utilisation the load would be 1.68 A. Residual ripple is < 75 mV, the line and load regulation is < 0.5 % at 0 to 100 % load at 25 °C and < 1 % at full voltage range in line at 25 °C, and the supply can start loads with up to 3000 µF of capacitance.

Protection includes overload and short-circuit with automatic reset, over-temperature with manual reset and overvoltage with manual reset. Output coupling is listed as parallel or serial. The connection pages of the datasheet show a parallel arrangement of at most two identical units, with equal cables and a maximum voltage difference of 25 mV, the load kept below 90 % of twice the nominal current, and a series arrangement with two diodes. The datasheet describes this parallel arrangement in terms of load sharing and does not present it as a redundancy scheme.

Typical uses of the ABLS1A24021 in Oman and the GCC

A 24 V, 50 W supply like this unit serves panel builders who want a slim DIN-rail supply in standard control cabinets across Oman and the GCC: PLC and sensor supplies in water and wastewater plants, pump and ventilation controls in buildings, and instrument panels in power and oil and gas sites. The region’s heat is the main consideration. The derating-free ambient band quoted above is the figure to compare with real cabinet temperature in direct sun or in rooms without strong air conditioning; where it is exceeded, either choose a larger rating so the load stays well under the derated current or improve ventilation.

Input behaviour of the ABLS1A24021

The input is 100–240 V AC single phase with limits of 85–264 V AC at 50–60 Hz, one band for both 115 V and 230 V networks. The inrush current is 35.0 A at 115 V and 75.0 A at 230 V, input current is < 1.1 A 115 V AC and < 0.65 A 230 V AC and the power factor is 0.45 at 115 V AC and 0.35 at 230 V AC. An internal fuse (not interchangeable, 3.15 A) protects the input and the datasheet recommends external protection of 10 A Curve B, 20 A Curve C, 6 A Curve C; the unit is listed for TN, TT and IT networks with a maximum leakage current of 1 mA 240 V AC. The datasheet adds that a switch or circuit breaker near the product must serve as the disconnecting device, that the unit is tested with branch circuit protection up to 20 A, and that it is only suitable for audio, video, information, communication, industrial and control equipment. Turn-on time is <3s and the holding time is > 20 ms 100 V AC and > 100 ms 230 V AC.

Choosing the ABLS1A24021: a short checklist

• Confirm the load voltage is 24 V DC and the total current stays below 2.1 A, with margin for the derating shown in the datasheet.
• Check the supply network: 100–240 V AC single phase.
• Check the mounting: Top hat type TH35-15 rail conforming to IEC 60715, Top hat type TH35-7.5 rail conforming to IEC 60715, Double-profile DIN rail, and the space of 30 × 75 × 89.5 mm.
• State the highest cabinet temperature of the installation.

ABLS1A24021 technical specifications

Mounting, cooling and environment of the ABLS1A24021

The unit measures 30 × 75 × 89.5 mm and weighs 0.180 kg. Mounting options in the datasheet: Top hat type TH35-15 rail conforming to IEC 60715, Top hat type TH35-7.5 rail conforming to IEC 60715, Double-profile DIN rail. Protection is IP20, the overvoltage category is II, pollution degree 2 and the shock protection class is Class I. Altitude is < 2000 m.

Temperature behaviour is described by mounting position (A and B are the permitted orientations; the datasheet shows incorrect mounting too). The datasheet gives these ambient bands for mounting position A: −10 to 55 °C without derating. Beyond them: −20 to −10 °C with current derating of 2 % per °C; 55 to 70 °C with current derating of 3.33 % per °C. Shock resistance is 150 m/s² for 11 ms, and a green LED shows the output voltage.

Information to send with an RFQ for the ABLS1A24021

• Reference ABLS1A24021 and quantity.
• Supply voltage, AC or DC, and frequency at the site.
• Load current and any peak or capacitive start-up currents.
• Mounting arrangement and enclosure temperature.
• Delivery location and required date.

Documents and quotation

The manufacturer datasheet for the ABLS1A24021 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 ABLS1A24021, 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.