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SMXir Control Systems

Digital Control for Direct Expansion and Tempered Water Air Conditioning

The SMXir keypad/display and optional remote control work with both DX microprocessor control systems offered by Cruisair – SMX II and SMX Net.

SMX II logic systems offer all the standard operational and safety features required for most Direct Expansion systems. SMX Net logic systems add networking capability and other special features that make it unique in the industry.

The SMX II or SMX Net power/logic board comes installed on the designated self-contained unit or condensing unit. Either logic system can be retrofitted in the field to replace an electromechanical switch assembly.


  • The SMXir keypad/display has an attractive, compact housing.
  • A large, easy-to-read LED display shows cabin temperature, setpoint, programming prompts, and fault code warnings.
  • Small LEDs and backlit text indicate system status.
  • An optional remote control is sold separately.
  • SMXir features a plastic housing, sealed membrane keypad, and electronics with anticorrosion coating.
  • Available in black or white, and with either a 3/4 or full coverage door.
  • Dehumidification Program – reduces moisture when the boat is unattended.
  • Low Voltage Shutdown; High/Low Pressure Shutdown.
  • Remote System Control.
  • Software Update Capability (SMX Net only).

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