System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin
34
Detailed Procedures
Designing and Building System 450 Control Systems
The variety and flexibility of System 450 modules and sensors allow you to build an almost limitless variety of
custom control systems. In fact, for many control systems, different System 450 components can be configured to
achieve the same results.
Observe the following guidelines when designing a control system and selecting components for your control
system:
• Determine the conditions and condition ranges that must be monitored and controlled in your application to
determine the sensors you need. Up to three sensors can be connected and up to three conditions can be
monitored simultaneously using standard control modules. See Table 2 on page 10 and Selecting, Installing,
and Setting Up Sensors for more information.
• Determine the type of control your application requires—standard control, relay control, analog proportional
control, Differential Control, High Input Signal Selection, multi-purpose, or a combination of control types. See
System 450 Control Systems with Standard Control Modules
on page 4 for more information regarding System
450 control types.
• Select the standard control module or hybrid analog output control module if your application requires on/off
relay control, proportional analog control, multi-stage control, multi-purpose control, stand-alone control, or
proportional plus integral control. (See Table 12 on page 55 for System 450 control module model information.)
• Determine the number and type (relay or analog) of outputs required to control the equipment in your
application. Up to ten outputs can be configured and controlled by a single System 450 control module.
• Determine the types of control and expansion modules (relay or analog) needed to provide the required
outputs for your application and the minimum number of modules required to provide those outputs.
Note: Many System 450 control systems can be configured using different combinations of module models to
build the assembly, but typically there is one combination of modules that is more cost effective to build
than other potential module assembly configurations.
Selecting, Installing, and Setting Up Sensors
In a System 450 control system, all of the outputs reference one or more of the sensors that are wired to the control
module and set up in the control module UI. Observe the following guidelines when selecting, installing, and setting
up sensors for your control system:
• Select only System 450 compatible sensors. See Table 5 on page 24 for a complete list of System 450 sensor
types and models that are compatible with standard control modules. See Table 14 through Table 18 in Repair
and Ordering Information on page 55 for more information on System 450 compatible sensors.
• Select only the sensors that match the desired conditions and units of measurement, and are designed to
operate in the ranges that your control system is intended to monitor and control.
• Ensure that the correct sensor is wired properly to the correct input terminals on the control module. See
Wiring System 450 Components
on page 36.
• Ensure that the wire length between the sensors and control module is as short as possible or practical, and
ensure that the wiring is properly sized. Refer to the sensor installation instructions referenced in System 450
Overview on page 3 for more information on wiring sensors.
• Ensure that the correct sensor type is selected in the System 450 UI for each sensor wired to the control
module. See Setting Up the Sensors and Transducers
on page 43.
• Ensure that each output references the correct sensor in the System 450 UI. See Setting up a System 450
Control System on page 40.
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