With Passport I/O Microprocessor Control System


The Compact Passport display is an easy-to-use wall-mountable unit available in black or white. The display has an integrated bezel. The display works with Marine Air’s Passport I/O microprocessor-based control system to provide precise control and monitoring of direct expansion and chilled water boat air conditioning systems. Passport I/O is dual voltage, operating at both 115 and 230 volts, 50 or 60 Hz. In chilled water air handlers, the system is referred to as AH-Passport I/O.

The assembly has a ground shield to protect against static interference and RF noise. The circuit board is conformally coated to provide high resistance to external damage or corrosion.

A display cable with gold plated phone-type modular jacks connects the panel to the system controller. An optional air sensor cable is connected to the circuit board in the same manner. Nonvolatile memory stores all user-selectable parameters indefinitely during operation or any power failure situations.

Internal self-diagnostic programs provide complete electronic checks of all lights, sensors, keys and circuits. Fused circuits and M.O.V.s (metal oxide varistors) provide component and board protection.

The Passport I/O control meets or exceeds applicable ABYC, U.S. Coast Guard Regulations and CE Directives.

Key Benefits

  • Automatic humidity control reduces moisture when the boat is unattended
  • Cool-only, heat-only, dehumidy, and automatic mode selection
  • New optional electric-heat relay
  • Automatic or manual fan-speed selection
  • Cycle fan with compressor or continuous fan operation
  • Calibration of fan-speed settings and temp display for precise control
  • Controls shaded pole and split capacitor fan motors
  • Compressor fail-safe protection
  • Programmable de-icing cycle
  • Built-in air sensor
  • Optional remote air sensor
  • Dimmable display
  • Low voltage for optimum safety