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The KAM/PSU/011 converts the nominal 28V aircraft power into the voltages needed by the Acra KAM-500 backplane. The DC/DC converters used are the largest components of any Acra KAM-500 module, so the unit is split in two (one half at each end). This allows the components to be bolted to the housing and their weight to be evenly distributed in the Acra KAM-500 chassis.

The +5V supply is primarily for digital circuitry, the ±12V supply is primarily for analog circuitry, and the ±7V is exclusively for bridge excitation. Unlike other Acra KAM-500 modules the KAM/PSU/011 can only be removed by first removing the sides. The KAM/PSU/011 is only supplied as part of the housing. The green LED indicates power on the +5V power line. 


  • Supplies +5V, ±7V, and ±12V for backplane
  • Fully isolated
  • No derating with temperature (-40 to +85°C)
  • Capacitor back-up: typically 24 ms, dropping from 28V @ 40W
  • Reverse polarity protection
  • Indefinite short-circuit protection
  • EMI filtering
  • Supplies up to 5A on +5V power line


  • Power supplies for data acquisition systems
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