24-V DIN Heavy-Duty Rail Supplies Meet Stringent Standards

June 7, 2004

Housed in a rugged compact casing, the SDN-P 24-V DIN single-phase rail power supplies are designed for reliable operation in industrial process-control, machine-tool, and other harsh factory floor applications. They meet standards for Class 1, Division 2 hazardous-location networks as well as NEC Class 2 specifications. They're also compatible with DeviceNet specs.

Available with high efficiency levels, they meet SEMI F47 Sag Immunity standards to guard against power-line electrical disturbances. Their power-factor correction reduces power losses. These features are combined in a space-saving high-density package that's just 3.26 in. wide (model SDN 10-24-100P). Other features include an auto-select input of 115/230 V ac at 50/60 Hz, a nominal and adjustable output voltage range of 22.5 V to 285 V dc ±2% (for line, load, and temperature-related changes), and less than 50 mA p-p of ripple current.

Five versions are available: the SDN 2.5-24-100P, SDN 4-24-100P, SDN 5-24-100P, SDN 10-24-100P, and SDN 20-24-100P with respective output currents of 2.5, 4, 5, 10, and 20 A, and respective peak power ratings of 60, 100, 120, 240, and 480 W. All models can be operated in single or in parallel via a front-panel jumper.

Typical efficiency ratings for the five models are 87.5%, 88%, 88%, 88%, and 90%, respectively. The first model can accept 25 A maximum of inrush current, the next two models 20 A maximum of inrush current, and the last models 40 A maximum of inrush current.

SDN-P power-supply prices start at $155 each with availability from stock.

Sola/Hevi Dutywww.solaheviduty.com

About the Author

Roger Allan

Roger Allan is an electronics journalism veteran, and served as Electronic Design's Executive Editor for 15 of those years. He has covered just about every technology beat from semiconductors, components, packaging and power devices, to communications, test and measurement, automotive electronics, robotics, medical electronics, military electronics, robotics, and industrial electronics. His specialties include MEMS and nanoelectronics technologies. He is a contributor to the McGraw Hill Annual Encyclopedia of Science and Technology. He is also a Life Senior Member of the IEEE and holds a BSEE from New York University's School of Engineering and Science. Roger has worked for major electronics magazines besides Electronic Design, including the IEEE Spectrum, Electronics, EDN, Electronic Products, and the British New Scientist. He also has working experience in the electronics industry as a design engineer in filters, power supplies and control systems.

After his retirement from Electronic Design Magazine, He has been extensively contributing articles for Penton’s Electronic Design, Power Electronics Technology, Energy Efficiency and Technology (EE&T) and Microwaves RF Magazine, covering all of the aforementioned electronics segments as well as energy efficiency, harvesting and related technologies. He has also contributed articles to other electronics technology magazines worldwide.

He is a “jack of all trades and a master in leading-edge technologies” like MEMS, nanolectronics, autonomous vehicles, artificial intelligence, military electronics, biometrics, implantable medical devices, and energy harvesting and related technologies.