Rockwell Automation 1772-LS_LSP,D17726.8.6 PROG/OPER MANUAL-MINI PLC-2/05 - Manual (Page 237)

Appendix
B
BĆ1
Glossary
You’ll find that each term in this glossary is concisely defined. These
definitions will provide you with a basis for understanding Allen-Bradley PCs.
In cases where a term may have more than one meaning, we give only those
definitions directly related to our products.
When reading this glossary, you’ll notice that common electrical terms and
symbols are not defined. We assume you have a working knowledge of
basic electricity.
This appendix contains defines terms and abbreviations that because of their
complexity or recent introduction are not widely understood. These terms are:
AC Input Module
An I/O module that converts various AC signals originating at user devices to
the appropriate logic level signal for use within the processor.
AC Output Module
An I/O module that converts the logic level signal of the processor to a usable
output signal to control a user AC device.
Adapter Module
A module that provides communication between an I/O chassis and the
processor. It transmits I/O chassis input information to and receives output
information from the processor.
Address
1) An alphanumeric value that uniquely identifies where data is stored. 2) An
alphanumeric value used to identify a specific I/O rack, module group,
and terminal.
Algorithm
A set of procedures used for solving a problem in a finite number of steps.
Analog
An expression of values which can vary continuously between specified limits.
Analog Input Module
A module that converts an analog input signal to a number that can be
manipulated by the processor.
Introduction