Marsa54LHD  (Marsa54L Heavy Duty)

The Marsa54LHD is a robustized version of the Marsa54L.  In addition to the standard Marsa54L features, the following design changes were implemented for durability and robustness.

  • Removable betore flight LCD screen
  • Replacement of electrolytic can capacitors with surface mount ceramic capacitors
  • Humiseal acyrlic conformal coating for environmental and contamination protection
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System Options
Accelerometer

Other features of the Marsa54L and Marsa54LHD that provide robustness:

  • 5V logic (compared to 3V) for extra EMI noise immunity
  • Output MOSFET's current limited below their rating regardless of load and power source (large LiPo battery safe)
  • True ematch resistance measurement better detects abnormal ematch connections

Battery recommendation: MarsaSystems recommends the use of 2S Lithium Polymer (LiPo) batteries with the Marsa54L and Marsa54LHD altimeters. Do not be concerned with battery capacity and C rating, the Marsa54L/LHD has current protected outputs in flight mode.