DC Power for Business-Critical Continuity™ DC to DC Converter MHSB20A Key Features n20 amp converter designed for -48V DC power applications nModular hot pluggable unit nWide operating temperature range The MHSB20A DC to DC converter from Emerson Network Power provides high reliability and availability. Description The modular 20 amp MHSB20A is a high frequency DC to DC converter. Plug’n’play technology allows for easy system configuration. System capacity can be increased by simply plugging an additional converter into an existing converter shelf or a newly added expansion shelf — no adjustments or setup are required. nDiode protected output for true redundancy Additional Information The 20 amp MHSB20A converter is designed for use with NetSure™ 721 and NetSure™ 701 DC power systems as well as the 160 amp DC to DC converter shelf, MHSB160CAB. Converter MHSB20A 167D-MHSB20A / 0612 1 DC to DC Converter Technical Specifications Ordering Information DC Input Nominal Voltage Operating Voltage Range Input Current Input Protection Part Number 486800128 588249700 582127000 582126000 Operating Efficiency DC Output Output Voltage Output Current Regulation -48VDC -42.0VDC to -60.0VDC Max 13 amps If the input voltage decreases beyond a non-adjustable predetermined value, the converter circuitry shuts down, disabling the output. The converter will recover automatically when the DC input voltage returns within normal operating limits. Overcurrent is protected by an internal fuse. 88% nominal Wide Band Noise +24VDC 20 amps maximum Steady state output voltage remains within +/-0.5 volt from -42.0VDC to 60.0VDC input and 0 to 100% load The voice-frequency noise generated by the converters does not exceed 32dBrnC output noise from 5% to 100% load Does not exceed 150 mv peak-to-peak or 15 mv rms Protection Current Limiting High Voltage Shutdown Parallel Operation 20.5 amps to 23 amps 27.6 volts to 30 volts Output blocking diode Voice Band Noise Monitoring Visual Indicators for Converter Module Visual Indicators for Converter Shelf Physical Characteristics Mounting Dimensions (H x W x D) Weight Environmental Temperature Altitude Ventilation Audible Noise Protection Safety Compliance Description 20 amp MHSB20A converter MHSB160CAB converter shelf NetSure™ 721 DC power system NetSure™ 701 DC power system Status Alarm Visual Indicator Color Normal operation Green Input OK Green Minor Alarm Yellow Major Alarm Red Plug-in installation 4.2 x 2.3 x 11.7 inches (106.7 x 58.4 x 297.2mm) 3.2 lbs. (1.5 kg) -40°F to 149°F (-40°C to 65°C) at full rated output 10,000 feet (3028m) derate by 1 deg C per 1000 feet above sea level Front to back The converter does not produce sound levels above 60dB(A), measured 5 feet in front of the converter, at the same horizontal line as the middle of the converter at 25°C The converter detects internal temperature and reduces output power to maintain components within design parameters. It recovers automatically when temperature is within normal operating range. UL recognized (UL60950) for USA & Canada, CE marked, NEBS Certified Emerson Network Power. The global leader in enabling Business-Critical Continuity™. nAC Power nConnectivity nDC Power nEmbedded Computing nEmbedded Power nIndustrial Power nInfrastructure Management & Monitoring nOutside Plant nPower Switching & Controls nPrecision Cooling nRacks & Integrated Cabinets nServices Business-Critical Continuity™, Emerson Network Power™, the Emerson Network Power logo, Emerson® and Consider it Solved are service marks and trademarks of Emerson Electric co. EnergyMaster ™, eSure™, NetPerform™, NetReach™, NetSpan™, NetSure® and NetXtend™ are trademarks of Emerson Network Power Energy Systems North America. EmersonNetworkPower.com/EnergySystems (North America) EmersonNetworkPower.eu/EnergySystems (EMEA) © Emerson Network Power Energy Systems North America 2012. 2 167D-MHSB20A / 0612