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Emerson Network Power Claims Highest-Wattage 12 V Distributed Power Supply

10th November 2009

Emerson

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Emerson Network Power, a business of Emerson and the global leader in enabling Business-Critical Continuity, today enhanced its highest-wattage 12V front-end distributed power supply, the DS2900. Expanding Emerson's DS line of distributed power solutions, the new DS2900 is ideal for use in high availability telecommunications applications and a variety of enterprise networking environments, including server farms and large storage systems.

The Emerson DS2900 is rated for up to 2900 W of adjustable output power at 240 A. In addition to the 12 Vdc output, it features as standard a 3.3 Vdc auxiliary output for powering standby circuitry and an optional alternative 5.5 Vdc auxiliary output. The compact 2U x 3U form factor of the DS2900 offers customers a high system-level power density of more than 24 W per cubic inch. As with many Emerson power supply solutions, the DS2900 features market-leading typical operating efficiency of approximately 91 percent at 50 percent load. The power supply's shorter form factor also enables mid-plane rack configurations, while same-side ac inputs and dc outputs allow hot-plug rack configuration.

The power supply accepts a wide input voltage range of 180 Vac to 264 Vac with no minimum load requirement and is equipped with active Power Factor Correction (PFC) rated at 0.99 typical to minimize input harmonic current distortion. It also features active ac inrush controls - limiting inrush current at power-on to 55 A - and is protected against overvoltage conditions up to 130 percent.

The DS2900 is equipped with a compact (40 mm by 28 mm), variable speed smart fan supported by integrated controls to enhance the product's energy efficiency and reliability. To minimize unplanned downtime and enhance serviceability, the DS2900 features both N+1 redundancy and internal ORing controllers. The DS2900 supports a wide operating temperature range of zero to plus 50 degrees Celsius and when used under normal operating conditions (25 degrees Celsius ambient at full load), it offers a high demonstrated mean time between failures (MTBF) of more than 500,000 hours.

To provide customers with real-time test, monitoring and configuration functionality, the power supply is digitally programmable and fully compatible with Emerson Network Power's PMBusTM graphical user interface software via an I2C communication interface bus.

The power supply complies with EN55022 and FCC part 15 Level A EMC standards for conducted noise, including all applicable immunity standards. It also carriers UL/cUL60950 safety approvals and is compliant with Restriction of Hazardous Substances (RoHS) directives.

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