1785-6.2.1, 2 - choosing hardware, Choosing hardware, Chapter objectives selecting i/o modules – Rockwell Automation 1785-LTx,D17856.2.1 Classic PLC-5 Programmable Controllers Users Manual User Manual
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Chapter
2
2-1
Choosing Hardware
Use this chapter to guide you in the selection of system hardware for
your application.
To select:
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I/O modules
2Ć1
I/O adapters
Chassis
Operator interface
PLCĆ5 processor
Power supplies
Memory modules
Batteries
Complementary I/O
Backup system
Termination resistor
Cables
You select I/O modules to interface your PLC-5 processor with machines
or processes that you have previously determined.
Use the following list and Table 2.A as guidelines for selecting I/O
modules and/or operator control interface(s).
How much I/O is required to control the process(es)?
Where will you concentrate I/O points for portions of an entire process
(when an entire process is distributed over a large physical area)?
What type of I/O is required to control the process(es)?
What is the required voltage range for each I/O module?
What is the backplane current required for each I/O module?
What are the noise and distance limitations for each I/O module?
What isolation is required for each I/O module?
Chapter Objectives
Selecting I/O Modules
System Design
Determined
Choosing
Communication
Transferring Discrete
and Block Data
Planning Your
System Programs
Calculating Program
Timing
Assigning Addressing
Mode, Racks,
and Groups
Placing System
Hardware
Choosing Hardware
Selecting Interrupt
Routines