Product Overview

The performance specifications are nominal and conform to acceptable industry standards. For applications at conditions beyond these specifications, consult the local Johnson Controls office.
Johnson Controls shall not be liable for damages resulting from misapplication or misuse of its products. © 2017 Johnson Controls. www.johnsoncontrols.com
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System 450™ Control Modules with Analog Output Catalog Page
Code No. LIT-1900656
Issued April 2017
Description
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 HVAC/R applications,
commercial process applications, and industrial process applications.
The System 450 control system is designed to replace System 350™
and System 27 control systems, and to provide many additional
features and benefits with fewer than twenty model variations.
System 450 control modules provide a field-configurable out-of-the-box
solution. Most System 450 control modules can control temperature,
pressure, and humidity systems simultaneously.
A single C450 control module can be set up as a stand-alone control or
connected to expansion modules to control up to ten On/Off relay and
proportional analog outputs, based on any of the three available inputs.
Refer to the following documents for important product application
information:
• System 450™ Series Modular Controls Product Bulletin
(LIT-12011458)
• System 450™ Series Modular Control Systems with Standard
Control Modules Technical Bulletin (LIT-12011459)
• System 450™ Series Control Modules with Analog Outputs
Installation Instructions (Part No. 24-7664-2853)
Features and Benefits
• Durable, Compact, Interchangeable Modular Components with
Plug-Together Connectors and DIN Rail or Direct Wall Mount
Capability—Eliminate field wiring between modules and allow you
to quickly and easily design, assemble, install, and upgrade your
control systems.
• Versatile, Multipurpose, Field-Configurable Control Modules
and Expansion Modules Designed for Global Use—Allow you to
create a wide variety of application-specific control systems capable
of controlling temperature, pressure, or humidity, or all three
conditions simultaneously, with only a small suite of module models.
• Control Modules with Bright Backlit LCDs and Four-Button
Touchpad User Interfaces, Up to Three Hard-Wired Input
Sensors and Up to Ten Relay or Analog Outputs (In Any
Combination) per Control System—Provide quick, clear, visual
status of your System 450 control system inputs and outputs with
the touch of a button and enable you to quickly and easily set up and
adjust your control system.
• Multipurpose, All-in-One Control Modules—Enable simple
stand-alone, single-module control systems that are temperature,
pressure, and humidity capable out of the box and easy to set up in
the field to replace a wide variety of OEM HVAC/R and process
controls.
• An Extensive Suite of Compatible Temperature and Humidity
Sensors and Pressure Transducers—Allows you to monitor and
control a wide range of HVACR and process conditions in a variety
of standard and global units of measurement.
• High Input Signal Selection—Enables your control system to
monitor a temperature, pressure, or humidity condition with two or
three sensors (of the same type) and control your system outputs
based on the highest condition value sensed by the referenced
sensors.
• Differential Control—Enables your control system to monitor and
maintain a temperature, pressure, or humidity differential between
two sensor points within a system, process, or space.
Repair Information
If the System 450™ control module with analog outputs fails to operate
within its specifications, replace the unit. For a replacement System
450™ control module with Analog Outputs, contact your
Johnson Controls® representative.
C450CPN-4C Control Module with Analog Output
Selection Chart
Refer to the System 450 Compatible Sensors, Transducers, and Accessories Catalog Page (LIT-1900662) for temperature sensors, humidity
sensors, and pressure transducers compatible with the System 450 Control Modules with Analog Outputs.
Standard System 450 Modules and Accessories Ordering Information
Product Code
Number
Product Description
C450CPN-4C Standard Control Module with LCD, Four-Button Touchpad UI, and Analog Output; provides one analog output (0 to 10 VDC or 4 to 20 mA
self-selecting signal) for proportional control.
C450CQN-4C Standard Control Module with LCD and Four-Button Touchpad UI, and Analog Output; provides two analog outputs (0 to 10 VDC or 4 to
20 mA self-selecting signals) for proportional control.
BKT287-1R DIN Rail; 0.30 m (12 in.) long
BKT287-2R DIN Rail; 1 m (39-1/3 in.) long
BKT287-3R DIN Rail; 0.61 m (24 in.) long
BKT287-4R DIN Rail; 0.36 m (14 in.) long
PLT344-1R DIN Rail End Clamps (Two clamps)
WHA-C450-100C System 450 module connection extension cable, 100 cm (3.3 ft) long