All options are included in rail DC/DCs for a ‘Plug and Play’ experience
The rail market is gaining two new DC/DCs from Recom, featuring an ultra-wide 11:1 input range to cover all nominal input voltages from 24V to 110VDC, with 24V output and a 12V and 15V output version to be announced soon
The RMD40-UW and RMD75-UW models have trimmable outputs with reinforced isolation, rated at 40W and 75W, respectively. The parts are available as lightweight baseplate-cooled modules, and a high conversion efficiency of over 90% enables them to operate at full power for OT4+ST1&ST2 classes from -40°C to +85°C without any additional cooling in any mounting position.
Standard features include:
- EN50121-3-2 filtering and disturbance protection
- Input reverse polarity protection
- Inrush current limiting
- Remote on/off
- Power-good signal/contacts
- Output trim
- Internal OR-ing diode for paralleling/redundant operation
An active hold-up circuit provides ≥10ms ride-through across the entire input range. Comprehensive protection against short circuits, overcurrent, overtemperature, and overvoltage is included, as well as EN50155 certification and approvals for rail applications.
These features enable a simple ‘plug and play’ system integration with ‘fit and forget’ confidence from a high MTBF figure and 20-year design lifetime/useful life class L4.
The RMD40-UW is available in a compact package measuring 100 x 60 x 30mm, while the RMD75-UW is 110 x 73 x 40mm. Connections are via block terminals or Cage Clamp terminals (suffix/PT), and a DIN-rail mounting option is available for both versions. The units come with aluminum housing in IP20, the electronic part is conformally coated for OV2/PD2 environment, and both families fulfill EN45545-2-HL3 fire protection hazard level.
Marco Kuhn, product manager DC/DC Plug & Play of Recom, said, “These DC/DCs require no extra components and no external circuits for compliance with all of the relevant railway emc, safety, environmental, and fire protection standards, making them a cost-effective, compact, and straightforward solution for auxiliary systems that need an isolated 24V bus.”
