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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, Inc. shall not be liable for damages resulting from misapplication or misuse of its products. © 2015 Johnson Controls, Inc. www.johnsoncontrols.com
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System 450™ Series Modular Controls (Continued)
System 450 Control Series
The Control Modules with Communications have additional
features:
• Ethernet communication capability through a built-in web server
(Ethernet Control Modules only) allows you to monitor your control
system status and set up or change the parameters by means of
a direct Ethernet cable connection, through a LAN connection, or
over the Internet. The built in web server delivers user-friendly web
pages to client browsers on a desktop, laptop, tablet, or smart
device.
• The Web page server on Ethernet communication modules
provides a simple, intuitive web interface for easy remote
monitoring, setup, adjustment and remote monitoring of your
control systems across Ethernet networks.
• RS485, RTU-compliant Modbus® network communication
capability (Modbus control modules only) enables a head-end
RS485 Modbus master controller to read and write control system
status and setup parameters to the System 450 Modbus
communication control module.
• Password protection for local access (Ethernet and Modbus
control modules only) and password protection for remote access
(Ethernet control module only) deters unauthorized changes to the
control system settings, but allows local and remote monitoring of
your control system status.
• Analog output signal limiting features (communication control
modules only) allow you to select the rate and condition range at
which the control updates the analog output signal, potentially
reducing wear on the controlled equipment.
• Binary input with time delay (communication control modules only)
allows you to use an external set of dry contacts and selectable
time delays to control relay outputs.
Applications
You can create a wide variety of custom, application-specific control
systems with System 450 modules. The following are some common
control application examples:
• Temperature control
• Pressure control
• Humidity control
• Multipurpose control
• Reset and setback control
• High input-signal selection
• Differential control
Temperature Control
• Temperature monitoring and alarming
• On/Off staged control of boilers and chillers
• Proportional stage control of boilers and chillers
• Boiler and chiller pump control
• Heating and cooling control with deadband
• Floating temperature control of damper and valve actuators
• Cooling tower fan speed/stage control based on water
temperature
• Supply, make-up, and mixed air temperature control
• Temperature actuated valve control
• Supply and make-up air damper and fan control
• Condenser fan staging or speed control based on condenser
temperature
Refrigerant Pressure Control
• Condenser fan cycling and stage control
• Multispeed condenser fan control
• Floating pressure control of damper and valve actuators
• Condenser fan speed and damper control
• High and low pressure cutout control
• Staged compressor control
• Cooling tower fan speed control based on high-side pressure
• Direct speed control of electronically commutated (EC) condenser
fan motors (C450CPW-100 model)
Other Pressure Control
• Relief damper and fan control for building pressurization
• Constant static pressure control
Humidity Control
• On/Off humidification and dehumidification control
• Proportional humidification and dehumidification control
• Multistage humidification and dehumidification control
• Humidity monitoring and alarming
Multipurpose Control
• Temperature and pressure based refrigeration rack control
• Temperature and humidity control of wine cellars and greenhouses
• Temperature, humidity, and static pressure control of clean rooms
and greenhouses
• Dehumidification with reheat control
Reset Control
• Boiler supply water temperature reset control based on outside air
temperature
• Chiller supply water temperature reset control based on outside air
temperature
• VAV zone temperature control based on outside air temperature
• Humidity reset based on outside air temperature
• Staged applications with runtime balancing
• Real-time Occupied/Unoccupied Setback
High Input Signal Selection
• Pressure-based fan speed or fan cycling control on multi-circuit
condensers
• Temperature-based fan speed or fan cycling control on
multi-circuit condensers
Differential Control
• Air and fluid pump-flow monitoring and alarming
• Air and fluid filter status monitoring and alarming
• Chiller barrel flow monitoring, control, and alarming
• Solar air and water heating applications
Note: Communications modules add network communication to any
application of your choosing, except those requiring reset, setback, or
EC motor control.
Repair Information
If a System 450 module fails to operate within its specifications,
replace the module. For a replacement module, contact your
Johnson Controls® representative.