Evaluation platform for railway DC/DC converters up to 240W Features with either high voltage (-1) or high current (-2) layouts Includes RIA12 surge stopper with reverse polarity protection Reference Design On-board EN50121-3-2 EMC lter layout Reference Suitable for 2x1, quarter brick or half brick converters External hold-up capacitor Design R-REF04-RIA12 Cage clamp terminals, isolated enable and fan connectors Selection Guide Part Input Input Output Number Voltage Range Current max. Current max. VDC A A R-REF04-RIA12-1 40 - 160 3.8 45 R-REF04-RIA12-2 12 - 75 10 45 Description The R-REF04-RIA12-1 and R-REF04-RIA12-2 are complete reference designs for railway applications. R-REF04-RIA12-1 is populated with components rated for higher DC input voltages up to 110VDC nominal input the R-REF04-RIA12-2 is populated with components rated for higher DC input currents up to 10A. Both boards are input side fused and can be used with DC/DC converters with single output currents up to 45A. The reference designs include a RIA12-conform surge stopper capable of blocking surge voltages up to 385VDC. The reference design has a universal pinout to accommodate DC/DC converters with 2x1, Quarter Brick or Half Brick standard case dimensions (sold separately). The following converters are suitable: Converter nom. Input Voltage Output Voltage Case Recommended Series VDC VDC Dimension Reference Design RP40-FR 24 3.3, 5, 12, 15, 24 2 x 1 R-REF04-RIA-2 48, 110 R-REF04-RIA-1 RPA60-FW 24 5, 12, 15, 24 2 x 1 R-REF04-RIA-2 RP75H-RW 24 3.3, 5, 12, 15, 24 Half Brick R-REF04-RIA-2 48, 110 R-REF04-RIA-1 RP40Q-RUW 16 - 160 5, 12, 15, 24, 48 Quarter Brick R-REF04-RIA-1 RP60Q-RUW 16 - 160 5, 12, 15, 24, 48 Quarter Brick R-REF04-RIA-1 RP90Q-RW 24 5, 12, 15, 24, 48 Quarter Brick R-REF04-RIA-2 48, 110 R-REF04-RIA-1 RP100H-RW 24 5, 12, 15, 24, 48 Half Brick R-REF04-RIA-2 48, 110 R-REF04-RIA-1 RP120Q-RW 24 5, 12, 15, 24, 48 Quarter Brick R-REF04-RIA-2 48, 110 R-REF04-RIA-1 RP180H-RW 24 5, 12, 15, 24, 48 Half Brick R-REF04-RIA-2 48, 110 R-REF04-RIA-1 RP240H-RW 24 5, 12, 15, 24, 48 Half Brick R-REF04-RIA-2 48, 110 R-REF04-RIA-1 Caution: ESD sensitive. Always follow ESD preventative procedures when handling the product www.recom-power.com REV.: 0/2019 P-1R-REF04-RIA12 Reference Design Speci cations (measured Ta= 25C, full load after warm up unless otherwise stated) Quick Start Guide 1. Fit the appropriate DC/DC converter (mounting holes are provided for xing screws) on to the board. Carefully solder the pins, checking that the solder connections are clean and there are no dry joints 2. If required, mount a suitable cooling fan (supply voltage = DC/DC output voltage) and connect to the fan supply connector, CON6 3. If necessary, connect an external hold-up capacitor using CON4 The required total hold-up capacitance can be calculated from the following relationship: C = total hold-up capacitance F hold-up P = output power W out 200 x P t out x t = required hold-up time ms hold-up hold-up C = hold-up 2 2 = ef ciency of converter (from datasheet) % 1000 x x ( V -V ) full load full load in nom. in min. V = nom. input voltage V in nom. V = min. operating input voltage V in min. of converter (from datasheet) Examples: 1: For a 10ms hold-up time for RPA120-11024SW (120W, 110VDC input, 24VDC output) R-REF04-RIA12-1 is used: P = 120W out 200 x 120 x 10 t = 10ms hold-up C = hold-up 2 2 1000 x 88.5 x ( 110 -53 ) = 88.5% full load V = 110V in nom. C = 292F hold-up V = 53V in min. No external hold-up capacitor is required (450F is on-board) 2: For a 30ms hold-up time for RP180-2415SW (144W, 24VDC input, 15VDC output) R-REF04-RIA12-2 is used: P = 144W out 200 x 144 x 30 t = 30ms hold-up C = hold-up 2 2 = 90% 1000 x 90 x ( 24 -9 ) full load V = 24V in nom. C = 19400F hold-up V = 9V in min. A 18000F external hold-up capacitor bank is required (1410F is on-board) 4. Connect the supply voltage to CON1 and, if necessary, enable the device via CON5 (/N versions are normally on if EN is left oating) www.recom-power.com REV.: 0/2019 P-2