System 450 Overview - Johnson Controls Penn System 450 Series Technical Bulletin

System 450 Overview

The System 450 Series is a family of compact digital electronic control, expansion,
and power modules that are easily assembled and set up to provide reliable on/off
and proportional control of temperature, pressure, and humidity conditions in a
wide variety of HVACR and commercial/industrial process applications.
The System 450 Series is designed to replace System 350 Series and System 27
Series control systems and provides more features and greater flexibility with far
fewer model variations. Most System 350 and System 27 modules are designed for
single condition applications (either temperature, pressure, or humidity) and
cannot be configured to control multiple conditions with a single control system.
Depending on the control module model used, a single System 450 control system
can monitor and control both temperature and humidity, or temperature, pressure,
and humidity simultaneously.
Note: System 450 modules are not compatible with System 350 or System 27
modules, but you can build all of the System 350 and System 27 control
systems and many more with System 450 modules, usually with fewer
modules.
The System 450 Series has several model variations; each module is designed to be
multi-purpose, adaptable, and completely field configurable for temperature,
pressure, and humidity applications. The System 450 Series allows you to build a
wide range of inexpensive, compact, durable, and versatile custom control systems
that allow you to monitor and control multiple control loops in your controlled
system. A System 450 control system can monitor temperature, pressure, and
humidity simultaneously and control up to ten outputs (analog outputs, relay
outputs, or both) based on the monitored conditions.
Note: System 450 communications control modules, System 450 standard
control modules, and the System 450 control module with hybrid analog
output can monitor and control temperature, pressure, and humidity
applications simultaneously. System 450 reset control modules can
monitor and control temperature and humidity applications simultaneously.
A System 450 standard control system includes:
• a single System 450 standard control module, which provides the control
system UI for setting up, monitoring, and controlling your system and the
sensor wiring terminals for connecting the sensors to your control system.
• one to ten outputs provided by the control module and expansion modules.
Each output provides either on/off control or a proportional analog signal
(0 to 10 VDC or 4 to 20 mA) to the equipment in your controlled system.
• one to three sensors or transducers, which are hard-wired directly to the control
module and provide input signals for monitoring and controlling your system
equipment.
• an optional power module to provide power to the connected control module
and expansion modules.
System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin 7