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​Netsure™ 531 A91
​Embedded High-Frequency Switch
Netsure 531 A91 subrack is designed by Emerson Network Power after many years of development and online operating experience. It is designed to meet the needs of LTE, FTTx, data communication, transmission and access devices. This subrack power system is highly reliable, high power density, high performance and it is fully digital
Brochures and Data Sheets
​​Product Downloads
  • The data center area and the installation cost can be saved due to its small size and embedded installation.
  • Wide input voltage range (85 300Vac), strong ability in adapting power grid 
  • Rectifier working temperature range: -40 +80°C (full load output if the range is -40 +55°C, derating output if exceeding 55°C)
  • Perfect lightning protection at AC side, DC side and signal side
  • Efficiency of rectifier is above 96%, efficiency of system is above 95%
  • Battery management, which prolongs the working life of battery
  • Provide multiple communication ports such as RS232, Ethernet port, dry contacts, etc, for flexible networking to achieve remote monitoring
Netsure 531 A91
System Capacity
M221S / M830B
Max: 9×R48-2000e3
AC distribution
(Input ) 1×63A/4P
Battery Capture
DC distribution
5×63A/1P, 5×32A/1P, 8×10A/1P
Lightning Protection
C-level lightning protection at AC side, lightning protection at DC side and signal side
Dry Contact
3 alarm inputs, 4 alarm outputs
(8 alarm outputs is  optional )
Top Cover, Temperature Sensor, Battery Rack
Technical Specifications