A range of stand-alone HVAC controllers has inputs that are configurable as proportional, on-off, or resistive temperature. Temperature, humidity, pressure, and other variables can be controlled with one controller. Features include alarm monitoring on all inputs, configurable action on alarm; automatic heat-cool, summer-winter changeover based on input value; backup-protected clock, seven-day time schedules; and password-protected user and expert control parameters. The controllers have adjustable PI control values and freely assigned inputs and outputs. Depending on the model, the units offer two or four independent control loops, two or four universal inputs (analog, binary, or resistive temperature), and one or two analog output (0/2-10 vdc, 0/4-20mA, or custom); both models have two digital outputs (relays). They are available in DIN rail cabinet mount configuration for use with remote sensors, or room mount with internal temperature and humidity sensors.
Vector Controls, 17 Francis J. Clarke Circle, Bethel, CT 06801; www.vectorcontrols.com