Detailed Procedures; Designing And Building System 450 Control Systems; Selecting, Installing, And Setting Up Sensors - Johnson Controls Penn System 450 Series Technical Bulletin

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 16 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 Standard Control Modules on page 9 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 11 on page 62 for System 450 control module
model information.) If your application requires functions that are not
available from the standard control module or hybrid analog output control
module, consider the communications control module or the reset control
module.
• 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 with standard control modules:
34 System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin