Inputs can span 43 to 154Vdc (4:1), and peak at 170V. Output is 24V at up to 500W even with the baseplate at 95°C. Efficiency is up to 95.5% while it consumes ~8.6W with no load.
Operation is across -40 to +70°C ambient without derating – or +85°C for 15 minutes, or 90°C with derating. Max baseplate temp is +95°C.
Packaging s 209 x 141 x 48mm and the unit can be operated in any orientation. Screw terminals are provided for input and output connections.
Other features included for EN 50155 are: reverse-polarity protection, EMC and surge filtering, in-rush current limiting and 10ms hold-up. “All relevant rail environmental standards are met for conducted and radiated EMI, mechanical shock and vibration, thermal shock, temperature cycling and fire protection,” said Recom.
As well as reverse-polarity, protections include: short-circuit, output over-voltage, over-current and over-temperature.
Dc-ok volt-free relay contacts are provide, as is remote on-off, output trim (-20% +5%, 19.2 to 25.2V) and active current sharing (OR-ing diodes needed for parallel operation) for increased power or n+1 redundancy.
The product is certified to EN 62368-1 and EN 50155 (S2) with 3.5kVAC rated isolation.
“RMD500-EW is the first in a standard range of dc-dcs from Recom for rail applications, such as traction and propulsion auxiliary supplies, braking, monitoring, safety, HVAC and door control systems and data loggers,” said company mobility product manager Marco Kuhn. “With all functions and features integrated, they are truly plug-and-play.”
