Reference designs aid UK RIA12 compliance

23rd August 2019
Mick Elliott

Two railway power supply reference designs from RECOM, available now at Dengrove Electronic Components, solve 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 pinout for 2in. x 1in., quarter-brick and half-brick standard case sizes, giving users the flexibility to choose from converters of various 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 385VDC. The clamp circuit also provides inrush 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 is now stocking the reference boards as well as a broad selection of applicable RECOM DC/DC converters, and can provide selection advice to support customers’ projects.

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