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AC/DCs can be delivered within a day

Posted: 28 Apr 2006 ?? ?Print Version ?Bookmark and Share

Keywords:Multistax? AC/DC power supply? Powerstax? Vince Biancomano?

Multistax AC/DC power supply

The Multistax family of ultralow-profile AC/DC supplies from Powerstax can be quickly configured to users' specifications and delivered within 24 hours.

The 1U-high, 4- or 6-slot supplies use a high-power front-end (i.e., the Power Unit) and plug-in local modules (i.e., Power Modules). OEM designers can specify one of three different front-end Power Unitseither 700W, 1kW or 1.2kW. Each universal AC-input front end (which also works from a 120Vdc to 380Vdc input) includes built-in EMI filtering.

Each Power Unit can accommodate up to six 240W Power Modules that are fully floating. Thus the modules, in eight versions that provide from 1.5V to 58V in single or dual-output models and can deliver up to 50A, may be fitted in any combination consistent with the front end's power capacity. The modules' output voltage can be adjusted over a wide range (using potentiometer control, or remotely using a resistive divider or voltage reference source). Modules can be connected in parallel for higher current, or in series in series for higher voltage. Output efficiency is as high as 90 percent.

The Power Modules feature better than 0.1 percent line regulation and 0.2 percent load regulation. Output ripple and noise is less than 1 percent peak-to-peak. Additional features include an indicator LED to confirm the power status of each module, and an optional remote alarm that provides signals for AC input failure, fan failure and over-temperature conditions. The modules also provide a 5V standby output.

The AC/DC systems are fitted with field-replaceable cooling fans and are rated for full power operation over an operating temperature range of -20C to 60C. The units meet EN55011, EN55022 and FCC level B specifications for conducted and radiated emissions and the EN61000-4-x level 3 spec for immunity to conducted and radiated RFI, ESD, fast transients, line surges and voltage dips.

The Multistax supplies are priced from $410 each in quantities of 100.

- Vince Biancomano

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