DC Power for ™ Business-Critical Continuity ® 80 Amp LORAIN DC-DC Converter Shelf with 10 Amp Converter Modules Compact, cost effective, modular design, ideal for +24 VDC Key Features applications requiring -48 VDC output. n Modular design provides for system redundancy and easy expansion of operating capacity in small increments n Hot insertion capability allows for system expansion without disruption n Compact shelf provides 80 amps 80 amp Converter Shelf at -48VDC in only 3 rack units (5.25-in.) of space in a standard Description 19-in. relay rack. Mounting rails are adjustable for 23-in. ® The LORAIN modular DC to DC converter shelf provides up to 80 amps at -48 volts DC mounting width via high frequency switch mode converters rated at 10 amps each. n Isolated input to output Modular design allows the converter’s capacity to expand as your system expands. The MHSA80CAB converter shelf can accept eight individual, 10-amp plug-in converter mod- n UL recognized to ensure safe and ules. Two or more shelves can be combined into one system for load requirements in reliable performance excess of 80 amps. The modules can be easily installed live without system interruption. +24 VDC input and expandable -48 VDC output makes this system ideal for both cellular radio and microwave sites with -48 VDC requirements. Standard Features n Converter MINOR alarm Application ® n Converter MAJOR alarm The LORAIN DC to DC converter system’s compact size and expandability makes it ideal for +24 VDC wireless sites requiring -48 VDC output. n Current limiting Additional Information n Over-voltage protection For additional specification, engineering or installation information, specify model n Over-temperature protection MHSA80CAB spec. number 588249301 (dual input feed) or 588249500 (individual converter input feed) and model MHSA10B spec. number 486800127 (module). n Load sharing for parallel operation n Easily accessible input and output connections for simplified installation 1 PDS-CONV-006 / March 2009 ® 80 Amp LORAIN DC-DC Converter Shelf with 10 Amp Converter Modules Specifications Input Voltage 24.0 volts DC nominal, with range of 21 to 28 volts DC Current 210 amps maximum (at full load with eight 10 amp modules, 21VDC input) Circuit Protection 35 amp fuse is located in the positive input lead of each converter module. Filtering Noise reflected back to the battery is less than 32dBrnC and is within the parameters set forth in Telcordia technical reference TR-TSY-000009, using test measurements in PUB43802, pages 5 and 6. Efficiency 87% typical 10 Amp Converter Module Output Voltage -48.0 VDC Current 10 amps per DC-DC converter module, up to a total of 80 amps per shelf with eight modules installed. Regulation Steady state output voltage remains within ±1 volt of the pre-adjusted voltage for any load current from no load to full load and over the specified input voltage range. Dynamic Response For a step load change of 50% within the range of 10% to 100% of full rated current, the maximum voltage transient will not exceed 5% of the initial steady state voltage. Filtering Voice band noise is less than 32dBrnC. Wide band noise does not exceed 250 mV peak to peak over the frequency range of 0 to 20 MHz. Wide band noise does not exceed 30 mV rms over the frequency range of 0 Hz to 20 MHz. Protection Overvoltage Each DC-DC converter module will automatically shut down and lock out should its output voltage exceed 115% to 125% of nominal voltage. Manual restart is necessary after the overvoltage condition is corrected. Overcurrent When the output current of a DC-DC converter module increases to a preset value between 102.5% to 115% of rated full load, the output voltage of the module will automatically decrease to limit current to this value. The output will recover to within specified limits when the overload condition is removed. Over Temperature Each DC-DC converter module will automatically shut down if the internal temperature of the module exceeds a predetermined value. Operation will automatically resume after the over-temperature condition is removed. Status/Alarm Indicators Frame Minor Alarm LED (yellow) and contact single DC-DC Converter Module failure Major Alarm LED (red) and contact two or more DC-DC Converter Module failures Input OK LED (green) the input voltage source is within operating limits Module Output OK LED (green) and contact output voltage is between the low and high voltage alarm limits and fan is operating normally. Environmental Operating Temperature -40°C to +65°C (-40°F to +149°F) Storage Temperature -40°C to +85°C (-40°F to +185°F) Humidity 0% to 95% relative humidity, non-condensing Altitude Maximum operating ambient temperature should be derated linearly (1°C per 1000 ft) at elevation above 3000 ft. Audible Noise The audible noise at any point 5 ft from any vertical surface of the shelf shall not exceed 60dB-A per ANSI S1.4. EMI/RFI Suppression This unit conforms to the requirements of FCC Part 15, Subpart B, Class B; EN55022, Class B for radiated and conducted noise; and GR-1089 CORE for conducted noise. AC Power Embedded Power Precision Cooling Emerson Network Power. Connectivity Monitoring Racks & Integrated Cabinets The global leader in enabling DC Power Outside Plant Services business-critical continuity. Embedded Computing Power Switching & Controls Surge Protection © 2009 Emerson Network Power Energy Systems, This publication is issued to provide outline information only which (unless agreed by Emerson Network Power Energy Systems, North North America, Inc. All rights reserved. America, Inc. in writing) may not be used, applied or reproduced for any purpose or form part of any order or contract or be regarded as a representation relating to the products or services concerned. Emerson Network Power Energy Systems, North America, Inc. reserves Emerson Network Power Energy Systems the right to alter without notice the specification, design or 4350 Weaver Parkway conditions of supply of any product or service. Warrenville, Illinois 60555 ® ™ Toll Free: 800-800-1280 (USA and Canada) Emerson , Emerson Network Power , Business-Critical ™ ™ ® Telephone: 440-246-6999 Fax: 440-246-4876 Continuity , NetSure and LORAIN are trademarks Web: EmersonNetworkPower.com/EnergySystems of Emerson Electric Co. and/or one of its subsidiaries. Printed in USA 2 PDS-CONV-006 / March 2009