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20 December 2011

Dual-Output and 100W Power Supply with Universal AC-Input Suits

Absopulse Electronics’ MIW 152R series dual-output, railway quality AC/DC power supplies utilise high-efficiency power conversion topology to deliver 100W output power. These units meet the requirements of EN 50155 for electronic equipment used on railway rolling stock. They also meet EN55022 Class B and EN50121-4 conducted and radiated EMI, EN50121-3-2 and relevant EN61000 standards, ensuring minimum interference to sensitive electronic equipment. These power supplies are suitable for a range of railway applications, including signalling and communications.

MIW 152R series provides any voltage from 3.3V to 110Vdc on V1 and any voltage from 3.3V-24Vdc/3Amax on V2. Both outputs are individually regulated, floating and isolated from each other; they have 1,000V isolation between the outputs and 4,300Vdc input to output isolation. Output "ON" condition is indicated by a green LED. These units accept a universal AC on the input. Other input and output values as well as an output fail alarm are available on request.

These units are heavily ruggedised, conformal coated and housed in a compact, vented enclosure that measures 114mm x 58mm x 256mm. They meet EN61373/IEC61373 shock and vibration standards.

The MIW 152R series operates at full specification (no de-rating) over a -25°C to +55°C cold-plate temperature range. Extended temperature ranges are available on request. Cooling is by conduction to customer heat-sink or chassis and by natural convection – the units require no fans. Efficiency at full load ranges between 80% and 90%, depending on input/output configuration. Generous design headroom, full electronic protection and the exclusive use of designed-in components with established reliability result in a high MTBF and ultimately, low life cycle costs of the units.

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