Power supply reduces footprint

A new, modular 3-phase 24 V dc / 20 A power supply is designed for applications demanding small footprints, it is less than half the width of previous models. Footprint size has become one of the most important purchasing criteria for automation and controls components; by reducing the width from 6.3 in. to 2.76 in., the new switched mode unit is among the most compact power supplies available.
By Control Engineering Staff June 25, 2008
Power Control
Siemens Energy & Automation Sitop Modular 3-phase 24V dc / 20 A power supply offers optional power security components, including selective circuit protection, to improve safety and efficiency.

Siemens Energy & Automation Inc. introduces its Sitop Modular 3-phase 24 V dc / 20 A power supply. Designed for applications demanding small footprints, it is less than half the width of previous models. Footprint size has become one of the most important purchasing criteria for automation and controls components, Siemens says, and by reducing the width from 6.3 in. to 2.76 in., the new switched mode unit is among the most compact power supplies available.

Wide input voltage range (360 to 550 V ac) covers the most common three-phase networks worldwide and helps the customer save more space. Unit converts industry standard three-phase 480 V ac into 24 V dc without added step-down transformers. Trouble-free load start up with high inrush current—required with dc / dc converters and direct current motors and solenoids—is achieved with extra power of 150% of the rated output current for up to 5 msec and power boost of 300% of the rated output current for up to 25 msec. If a parallel connection is required, the load sharing option can be selected, guaranteeing that each of the two power supplies, set up in parallel, provides the loads with 50% of required total current. Weighing 2.65 lb., the 93% efficient power supply also offers improved ambient temperature range, from 14 to 140°F, without de-rating. www.sea.siemens.com Siemens Energy & Automation Inc.