Rockwell Automation Allen-Bradley AADvance T9110, Solutions Handbook

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Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019 95
Chapter
6
Specifying a New Controller
This chapter goes through a list of key information needed to specify a new
AADvance controller. The flowcharts and tables that follow will guide you
through the process of defining a system for your business application and
system requirements.
Information to Specify a New
Controller The following sets of information are needed to specify a new controller:
• The intended safety integrity level (SIL 2 or SIL 3) for your application
• The desirable degree of fault tolerance
• Whether any final elements are energize to action (affects output
module arrangements for SIL 3 requirements)
• The type and quantity of inputs and outputs
• The process safety time for each safety function
• Do you need a "hot swap" feature for any channels
All of these items must be assessed and known for the specified plant and the
intended application.
Define a New System The charts use minimal designs to illustrate solutions.