C C S S O O R R E E M M T T P P R R L L I I E E A A V V N N N N T T Fully railway approved for EN50155 (S2) applications EN50121-3-2, EN50124-1, EN62368-1, EN61373, Features EN45545-2 DC/DC Converter Plug&Play unit for natural convection cooling Wide range input for nominal 72V and 110V Regulated Excellent efficienc y and functionality Parallel and redundant operation Converter RMD500-EW Extremely reliable and robust Description 500 Watt The chassis mountable RMD500 series DC/DC converter is designed for railway rolling stock and 2 transportation applications. The unit is designed with 4:1 input voltage range to cover the input voltages 8.23x5.56 from 43.2VDC up to 170VDC for nominal 72V and 110V in one range with isolated and regulated 24V output, based on a reinforced isolation system. The converter has a constant and high efficiency Single Output of 95%, and the base plate mounting permits a wide operating temperature for OT4+ST1&ST2 class from -40C to +85C without derating. Input reverse polarity protection, inrush current limitation, 10ms hold-up time, remote control, and output OR-ing diode round up the functionality of this fully railway compliant Plug&Play unit. Selection Guide Part Input nom. Output max. Output Efficiency Output (1) Number Voltage Range Voltage Current typ. Power 2 + RoHS REACH compliant compliant VDC VDC A % W 10 from 10 RMD500-110-24SEW 50.4 - 137.5 24 21 95 500 Notes: EN62368-1 pending Note1: Efficiency is tested a t nominal input and 50%-100% +25C ambient EN50124-1 pending EN45545-2 pending EN50155 pending EN50121-3-2 compliant Model Numbering EN55011 compliant EN61000-4-2,3,4,5 compliant RMD500-110- SEW Single max. Output Power nom. Output Voltage nom. Input Voltage Specifications (measured Ta= 25C, nom. Vin, full load and after warm-up unless otherwise stated) BASIC CHARACTERISTICS Parameter Condition Min. Typ. Max. nom. V 50.4VDC 72VDC 137.5VDC IN Input Voltage Range according to refer to for 100ms max. 43.2VDC EN50155 Input Voltage for 1s 154VDC Range Input Surge Voltage for 3s max. (extended to EN50155) 170VDC Input Capacitance internal 11F rising edge 45.3VDC 50.4VDC Under Voltage Lockout falling edge 35VDC 43.2VDC V = 43.2VDC 12A IN Input Current Range V = 72VDC 7.5A IN V = 110VDC 5A IN Inrush Current active inrush current limitation 20A V = 72VDC 8.5W No Load Power IN Consumption V = 110VDC 8.7W IN continued on next page www.recom-power.com REV.: 0/2021 PD-1 O O P P C C R R O O M M D D O O U U C C Preliminary C C E E T T R R S SRMD500-EW DC/DC Converter Series Specifications (measured Ta= 25C, nom. Vin, full load and after warm-up unless otherwise stated) BASIC CHARACTERISTICS (continuous) Parameter Condition Min. Typ. Max. V = 50.4VDC 7.2mA IN V = 72VDC 6.6mA Standby Current IN (shutdown by remote) V = 110VDC 6.8mA IN V = 137.5VDC 7.5mA IN Output Current Range parallel operation refer to PARALLEL OPERATION 0A 21A Output Voltage 24VDC Output Voltage Trimming refer to OUTPUT VOLTAGE TRIMMING 19.2VDC 25.2VDC Minimum Load 0% V = 72VDC 1s IN Start-up Time V = 110VDC 0.6s IN by using CTRL ON/OFF function 0.3s Rise Time 100ms V = 72VDC 16ms IN V = 110VDC 20ms Hold-up Time IN V = 137.5VDC 23ms IN DC-DC ON high/open or 12VDC < V <154VDC CTRL ON/OFF CTRL DC-DC OFF (pin15 INH connected pin16 INH0) low or -2VDC < V < 2VDC CTRL Input Current of CTRL pin DC-DC ON 10mA Internal Operating Frequency 70kHz Output Ripple and Noise over full input and load range, 20MHz BW 50mVp-p Maximum Capacitive Load 50mF Input Voltage Range (according to EN50155) (extended to EN50155) 100 0.1s continuous operation 1s 3s 0 43.2 50.4 137.5 154 170 Input Voltage VDC Constant Current / Constant Voltage 28 24 20 16 12 8 4 0 0 4 8 12 16 20 24 28 23 Output Current A continued on next page www.recom-power.com REV.: 0/2021 PD-2 Preliminary Output Power % Input Voltage VDC