Reference designs solve EMC and surge-protection challenges for railways
Two railway power supply reference designs from Recom are available now at Dengrove Electronic Components. They are designed to meet engineering challenges including filter layout for EN 50121-3-2 EMC compliance and surge prevention meeting the UK RIA12 specification.
The R-REF04-RIA12-1 board targets high-voltage applications up to 110V, while the R-REF04-RIA12-2 is built to handle DC input current up to 10A. Both are input-side fused and can be used with single-output DC/DC converters up to 45A. The boards feature a universal pin-out for 2.0 x 1.0-inch (50 x 25mm), quarter-brick and half-brick standard case sizes. Dengrove explains that this gives users the flexibility to choose from converters of power ratings up to 240W.
RIA12 surge protection is provided using an active input-voltage clamp featuring a surge-stopper IC, which acts quickly to block surge voltages up to 385V DC. The clamp circuit also provides in-rush current limiting. The boards provide a nominal value of hold-up capacitance, with connectors to add extra capacitance if required. The input, output, and hold-up connections feature easy-to-use cage-clamp terminals, and there are isolated connections for fan power and system enable.
Dengrove stocks the reference boards and a broad selection of applicable Recom DC/DC converters and can provide selection advice.
Dengrove Electronic Components was established over 30 years ago. It provides a component distribution service to a wide range of industry sectors. The independent franchised broadline distributor is based in Bedfordshire, England. It has ISO9001 certification and includes Recom, Temas and Yuasa on its line-card.
Dengrove also offers component sourcing and kitting services.