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From condensing units to greenhouses – optimize a wide range of applications with PENN System 450 Modular Electronic Controls

For nearly over a century, PENN has helped people control the things that are important to them. With System 450, now you can get hundreds of control options and flexibility from a small suite of control modules.

System 450 is a family of modular, digital electronic controls that are easy to assemble and set up for reliable temperature, pressure, and humidity control. This allows System 450 to handle a variety of multi-condition applications such as wine cellars, greenhouses, swimming pools, and spas.

Standard controls and reset controls can be used as standalone devices, or in conjunction with expansion modules, to control a wide range of single-stage, multi-stage, and proportional refrigeration, HVAC, and industrial applications.

Features and Benefits of PENN System 450 include:


  • 3-year limited warranty
  • Control temperature, pressure, and humidity simultaneously
  • Superior sensors for greater accuracy
  • Expandable based on application needs –
    • Up to 3 sensor inputs
    • Up to 10 on/off or proportional outputs
  • Wide variety of control capabilities
    • On/off relay control
    • Proportional control
    • Differential control
    • Reset control
    • Many more
  • Remotely monitor and control the entire system with the Ethernet module
  • UL, cUL, C-Tick, RoHS compliant


New System 450 C450CCU Application-Specific Controller

The newest addition to the System 450 family, the C450CCU controller, is ideal for walk-in coolers/freezers and large display cases.

The C450CCU combines the functions of a space temperature control, defrost time clock, defrost temperature termination control, fan delay switch, and pump-down control. This provides refrigeration equipment OEMs and service contractors with an affordable alternative to electromechanical controls with the added benefit of System 450’s accurate temperature sensing and control, fail-safe modules, and alarm functions.


Contact your local United Refrigeration for more information.

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