This fully encapsulated, rugged, railway quality DC/DC converter uses field-proven technology to generate between 250 ~ 300W, depending on the input/output combination required. It is a mature design with a track record in numerous applications. The unit is entirely potted with a thermally conductive MILgrade silicon rubber compound to ensure immunity to shock, vibration and humidity.
It is conduction-cooled via a base plate to a heatsinking surface. Low component count, large design headrooms, and the use of components with established reliability result in a high MTBF. The unit meets the requirements of EN50155 for electronic equipment used on rolling stock.
Helios power supplies are ruggedly constructed and can be customized for specific mechanical requirements. Standard mechanical packages and ruggedization options include:
|Model||Standard Outputs||Power (W)|
|Operating input voltage range||24VDC ( 14.4 ~ 34 )|
36VDC ( 22 ~ 51 )
48VDC ( 20 ~ 67)
72VDC ( 43 ~ 101)
96VDC ( 58 ~ 135)
110VDC ( 66 ~ 154)
|Input Protection||Reverse polarity protection.Inrush current limiting Lower voltage than specified will not damage unit|
|Output Voltage||See table|
|Regulation||±1% Line / Load combined|
|Operating Temp:||-40ºC to +70ºC cold plate temperature|
|Efficiency||Model dependent , typically 80-90%|
|Dynamic Response||Max ±5% diviation for 10% – 50% load step wuth 1msec recovery|