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280W, Encapsulated DC/DC Converter for Railway Environments
Absopulse Electronics’ RWY 280H Series is a rugged, railway quality DC/DC converter that utilizes high efficiency push-pull power conversion topology. This 280W converter has significantly larger design headroom than our earlier field-proven RWY 280 design, and can therefore comfortably deliver up to 300W output power. The RWY 280H complies with all relevant railway standards including EN 50155, EN50121-3-2 conducted and radiated EMI, EN 55022 Class B, and EN 61000 immunity, and it is suitable for a wide range of on-board and trackside railway applications. The unit accepts supply voltages of 24Vdc (14.4-34V range), 36Vdc (22-51V range), 48Vdc (29- 67V range), 72Vdc (43-101V range), 96Vdc (58-135V range) or 110Vdc (66-154V range). It delivers any single output voltage from 12V to 110Vdc; the output is floating and either terminal can be grounded. An optional built-in redundancy diode for parallel connection to achieve higher output power or N+1 redundant operation is available. Other input and output voltages, as well as an ’ON’ LED are also available on request. The RWY 280H operates within a -40°C to +70°C cold plate temperature range for full specification. Cooling is by conduction via a base plate to a heat-sinking surface. Encapsulation in a thermally conductive MIL-grade silicon rubber compound ensures immunity to shock and vibration (EN61373/IEC61373), moisture and airborne contaminants. It measures 113 x 60 x 200 mm, (it is 0.125” higher than the RWY 280) and it weighs approximately 1.8 kg. Low component count, large design headroom, and the use of components with established reliability result in a high MTBF. The unit has 3kVdc input to output isolation, inrush current limiting and reverse polarity protection at the input. Over-voltage, rectangular current limiting with non-hiccup type short circuit protection and thermal protection are standard. For detailed specifications, please see datasheet above (right). Absopulse offers an extensive range of encapsulated DC/DC converters designed for operation in railway and other extreme environments. Our designs can be modified to meet customer electrical and mechanical requirement. Datasheets for these designs are available here. Return to the Press Release Index page. November 2010. |
Datasheet
Detailed specifications for this design, please download our generic datasheet below  RWY 280H datasheet
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