1000W, High Reliability, Convection Cooled, Industrial Quality DC-DC Converter BHR 65X2-4U2NF Series (Opto-less) • • • • • • • No optocouplers, low component count Cooling by convection only (no fans or forced air) Rugged construction Conformal coating High input/output isolation Full electronic protection Customized versions available This rugged, industrial quality DC-DC converter is designed for a long operating life. By eliminating optocouplers in the feedback loop, the MTBF of the unit is greatly improved over conventional designs. The converter is built with two BHR 65 modules connected redundant parallel. Each internal module generates 500W. This modular construction provides inherent redundancy; the failure of one internal module would cause a 50% drop in output power while the unit remains functional at 500W. Therefore, this design can also be used as a 500W redundant power supply. A +/- dual output configuration is also possible. The mechanical construction has no internal wiring, which increases withstand capacity for vibration and contributes to long-term reliability. In addition, the internal boards are conformal coated for immunity to humidity and contamination. All heat generating components are installed on aluminum heat-sink blocks which are thermally coupled to the heatsink fins and cooled by natural convection. Heatsink fins are installed on the side of the unit and internally for efficient cooling. The input and output are filtered for low noise. Full electronic protection eliminates failure due to abnormal operating conditions, including application errors. Large design headroom and the use of components with established reliability also contribute to the long operating life of the unit. An EN50155 compliant railway quality version of this design, the BHR 65X2R-4U2NF, is also available. SPECIFICATIONS Input Voltage 48Vdc (42-60V) 125Vd (105-145V) For other input voltages, please consult factory. Input Protection Inrush current limiting Varistor Reverse polarity protection Internal safety fuse Lower voltage than the specified minimum input will not damage the unit Isolation Corresponding to input/output voltage: Min. 1000Vdc input to chassis Min. 2250Vdc input to output Min. 500VDC output to chassis Standards Designed to meet EN 60950-1 and corresponding UL and CSA standards Output Voltages 24V, 48V or 125Vdc 1000W continuous 12Vdc at 800W continuous Output is floating; either terminal can be grounded Consult factory for other voltages Redundancy diode Internal boards are connected parallel via redundancy diode Line/Load Regulation ± 1% combined from 10% load to full load Dynamic Response Max 5% voltage deviation for 10% to 50% load step, with better than 1msec recovery time Output Ripple / Noise Better than 1% of output voltage peak to peak or 0.2% Vrms (20MHz BW) EMI EN55032 Class A with margins Output Overload Protection Rectangular current limiting with short-circuit protection Thermal shutdown in case of insufficient cooling (self-resetting) Output Overvoltage Protection Second control loop Efficiency Typically 80-90% at full load depending on input/output combination Indicators Green ‘Output ON LED’ visible through cooling slots Operating Temperature Range -20ºC to 50ºC for full specification Extended temperature ranges available on request Temperature Drift 0.03% per ºC, over operating temperature range Cooling By natural air convection Environmental Protection Ruggedizing Conformal coating Shock/Vibration IEC 61373 Cat 1 A&B Humidity 5 - 95% non-condensing MTBF 175,000 hours at 45 oC Demonstrated MTBF is significantly higher Control Input Optional Alarm Output None on standard version Output fail alarm Form C contacts installed on request Package/Dimensions (H x W x D) 4U2NF: 178 x 140 x 309 mm (7" x 5.5" x 12") Dimensions include heatsink fins exclude connectors and L-brackets Mounting holes are clear Weight 6.8 kg (15 lb) Connections Barrier type terminal blocks or threaded studs RoHS Compliance Compliant Warranty Two years subject to application within good engineering practice ABSOPULSE power supplies are designed and built to customer requirements. The specifications on this data sheet are generic guidelines only and are subject to change. OEM of industrial and railway quality DC-DC converters, AC-DC power supplies and battery chargers, DC-AC sine-wave inverters, phase and frequency converters, DC-output UPS systems and complete power systems in 19" and 23" racks since 1982. Custom or standard. ABSOPULSE is a BABT-approved Facility. ABSOPULSE ELECTRONICS LTD 110 Walgreen Road, Ottawa. Ontario | K0A 1L0 | CANADA Tel: +1-613-836-3511 | Fax: +1-613-836-7488 https://absopulse.com/contact | https://www.absopulse.com Copyright: This document is the property of ABSOPULSE Electronics Ltd Its content is proprietary and may not be reproduced in html text or any other format. Proprietary notices may not be deleted from data sheets or from other materials downloaded from https://absopulse.com/