Keypad/Display for Passport I/O Digital Control Systems
The Passport I/O Environmental Control is a microprocessor-based controller, designed for the precise monitoring of direct expansion and chilled water air conditioning systems in marine environments.
The control is dual voltage, operating at both 115 and 230 Volts, 50/60 Hz. The display is available in both black and white.
For chilled water air handlers, the control is called the AH-Passport I/O.