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Refer to the QuickLIT website for the most up-to-date version of this document.
System 450™ Series Control Modules with Analog Outputs Installation
Instructions
Application
System 450™ is a family of modular, digital electronic controls that is easily assembled and set up to provide
reliable temperature, pressure, and humidity control for a wide variety of HVACR and commercial and industrial
process applications.
The System 450 control modules allow you to configure custom application-specific control systems with up to
three input sensors and ten (relay, analog, or both) outputs, including control systems that can monitor and control
temperature, pressure, and humidity applications simultaneously.
You can easily install and quickly configure a stand-alone System 450 control module and sensor in the field as a
replacement control for almost any temperature, pressure, and humidity control.
C450CPN-4 and C450CQN-4 models are analog output control modules with LCD and a four-button touchpad user
interface (UI) that allows you to set up a System 450 control system. C450CPN-4 models provide one
self-selecting analog output, and C450CQN-4 models provide two self-selecting analog outputs.
Refer to the System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin
(LIT-12011459) for more detailed information on designing, installing, setting up, and troubleshooting System 450
Series control systems. The System 450 technical bulletin can be accessed and downloaded on the Johnson
Controls® QuickLIT Product Literature website.
IMPORTANT: Use this System 450™ Series Control Module with Analog Outputs only as an operating control.
Where failure or malfunction of the System 450™ could lead to personal injury or property damage to the
controlled equipment or other property, additional precautions must be designed into the control system.
Incorporate and maintain other devices, such as supervisory or alarm systems or safety or limit controls,
intended to warn of or protect against failure or malfunction of the System 450 Module.
IMPORTANT : Utiliser ce System 450™ Series Control Module with Analog Outputs uniquement en tant que
dispositif de contrôle de fonctionnement. Lorsqu'une défaillance ou un dysfonctionnement du System 450™
risque de provoquer des blessures ou d'endommager l'équipement contrôlé ou un autre équipement, la
conception du système de contrôle doit intégrer des dispositifs de protection supplémentaires. Veiller dans ce
cas à intégrer de façon permanente d'autres dispositifs, tels que des systèmes de supervision ou d'alarme, ou
des dispositifs de sécurité ou de limitation, ayant une fonction d'avertissement ou de protection en cas de
défaillance ou de dysfonctionnement du System 450 Module.
System 450™ Series Control Modules with Analog Outputs
Installation Instructions
C450CPN-4
C450CQN-4
Part No. 24-7664-3191, Rev. B
Issued October 2018
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