The EN50155 (Electronic equipment used on rolling stock) specifies high requirements for information systems and electronic components used in railway engineering. This also applies for DC/DC-converters, which have to function as reliable power supplies for many years. Extreme conditions such as heat, cold, shock and vibration have to be met – exactly the environment that the RPR-series from RECOM have been designed for.
The new RPR-converters work with full power at operating temperatures of -45°C to > +85°C without derating (Tx). The efficiency is >89%. These converters are very robust and EN61373 tested for 10G shock and vibration in all three axes. The series is power rated with 20, 30, 40 and 50 watts. They cover a wide input voltage range of 12 to 36, 25 to 75 and 40 to 160VDC. Single output voltages of 3.3, 5, 12, 15 and dual output voltages of ±12, ±15 and ±24VDC are available as standard.
RPR-converters are available in three different case styles. The “ribbed case” with integrated heat sink which is ideal for PCB mounting with convection cooling, the “flat case” version, useful in low profile applications with limited headroom, and the “base plate case” version where the converters are screw mounted to the frame for mechanical stability.
The RPR-converters are EN50155 and EN60950-1 compliant and have 1.6kV/1min. isolation as standard. They have integrated EMC filters according to EN50121-3-2, so a complete power supply can be build using only a few external components. The MTBF at BELLCORE TR-NWT-000332 at +50°C is 2 million hours. The RPR-series are low cost railway converters offering distinctive technical advantages (size, performance and reliability) over existing railways DC/DC products.