The MEAN WELL DDR-240 series DC to DC converters have been designed to comply with standards EN50155 and EN45545-2, so they are suitable for use on locomotives and passenger trains or trams. They are only 40mm wide and have a wide 2:1 input voltage range. There are three input options:
 
16.8~33.6 VDC
33.6~67.2 VDC
67.2 ~ 154VDC
 
The output voltage can be adjusted via the built-in potentiometer and these DC converters have a 150% peak load capacity. For safety the DDR-240 DC converters have 4KVdc reinforced input / output isolation. There is also a DC OK relay contact for remote status monitoring.
 
Up to 4 units can be connected in parallel to deliver up to 960-Watts of power.
 
Refer to table below for models in the range:
 
Output
Input
 
DC Voltage
Power
Rated Current
Input Efficiency
Input Voltage
DDR-240B-24
24V
240W
0 ~ 10A
90.00%
16.8 ~ 33.6VDC
DDR-240B-48
48V
240W
0 ~ 5A
90.00%
16.8 ~ 33.6VDC
DDR-240C-24
24V
240W
0 ~ 10A
91.00%
33.6 ~ 67.2VDC
DDR-240C-48
48V
240W
0 ~ 5A
92.00%
33.6 ~ 67.2VDC
DDR-240D-24
24V
240W
0 ~ 10A
92.00%
67.2 ~ 154VDC
DDR-240D-48
48V
240W
0 ~ 5A
92.50%
67.2 ~ 154VDC