System 450 Series of microprocessor-based modular controls from the Johnson Controls/PENN brand provide accurate digital control for a variety of HVAC/R and industrial applications. There are nine model variations that are multi-purpose, adaptable and field configurable and can monitor and control temperature, pressure and humidity simultaneously. Applications include heating and/or cooling control, boiler temperature reset, fan control, floating pressure of an actuator and humidification/dehumidification control.
