Industry Trends in Power Supply Technology

Industrial automation increasingly demands reliable and efficient power supplies to support continuous operations. The shift toward compact, DIN-rail-mountable units with high efficiency and global safety certifications is a key trend. The ABB SD831 addresses these needs with a switch-mode design that converts mains voltage to stable 24 volts d.c.

Introducing the SD831

PetroPartsOnline now offers the ABB SD831, a power supply unit engineered for non-redundant and redundant applications. This unit features simple DIN-rail mounting and is accepted for SELV or PELV applications. It provides a soft start feature, ensuring power-on does not trip fuses or earth-fault circuit breakers.

Technical Specifications and Performance

The SD831 delivers a rated output current of 3 A and a rated output power of 72 W. It accepts a nominal mains/input voltage of 100-240 V a.c. or 110-300 V d.c., with a mains frequency of 50-60 Hz. Efficiency is rated at 88/89.8 %, and heat dissipation is 10/8 W.

Output voltage regulation at maximum current is less than 50 mV or less than 100 mV, with ripple (peak to peak) under 50 mV. The unit also includes output over-voltage protection set at less than 39 V. These parameters ensure stable power delivery for sensitive industrial loads.

Applications in Modern Manufacturing

In manufacturing environments, the SD831 can power control systems, sensors, and actuators requiring a stable 24 V d.c. supply. Its compliance with EN 50178 and UL 508 makes it suitable for machinery safety applications. The unit's ability to operate on both a.c. and d.c. input adds flexibility for global installations.

For example, in a packaging line, the SD831 can supply power to programmable logic controllers and human-machine interfaces. Its soft start feature prevents nuisance tripping of upstream protection devices during system startup.

Compatibility and Integration

The SD831 is designed for Class I Equipment when connected to Protective Earth (PE) and supports Over-voltage Category III for primary mains connection. It is suitable for TN network systems. The unit's secondary output circuitry is accepted for SELV or PELV applications, simplifying integration into safety-critical systems.

Frequently Asked Questions About the SD831

What is the rated output voltage and current of the SD831?

The SD831 has a rated output voltage of 24 V d.c. and a rated output current of 3 A. The maximum output current is 3.3 A.

What safety certifications does the SD831 comply with?

The SD831 complies with EN 50178, EN 61131-2, and UL 508. It also carries a CE mark and meets EMC standards EN 61000-6-4 and EN 61000-6-2.

Can the SD831 be used in redundant power supply configurations?

Yes, the SD831 can be used for redundant applications. Redundant configurations require diode voting units SS823 or SS832, as noted in the product documentation.

What is the ambient temperature range for the SD831?

The maximum ambient temperature for the SD831 is 55 °C. It is designed to operate within mechanical operating conditions per IEC 61131-2.

Company Strength and Supply Assurance

PetroPartsOnline is a trusted supplier of industrial automation and oil/gas parts, offering the ABB SD831 with reliable availability. Our team ensures that products meet the highest quality standards for demanding industrial applications. Contact us for lifecycle status and ordering details.