Rockwell Automation 1794-IT8,D17946.5.7 Thermocouple/Millivolt Input Module - Manual (Page 11)

Chapter
1
Publication 1794-6.5.7
Overview of FLEX I/O and your
Thermocouple/mV Module
In this chapter, we tell you:
•
what the FLEX I/O system is and what it contains
•
how FLEX I/O modules communicate with programmable
controllers
•
the features of your thermocouple module
FLEX I/O is a small, modular I/O system for distributed
applications that performs all of the functions of rack-based I/O. The
FLEX I/O system contains the following components shown below:
Adapter/Power Supply Terminal Base I/O Module
20125
•
adapter/power supply – powers the internal logic for as many as
eight I/O modules
•
terminal base – contains a terminal strip to terminate wiring for
thermocouple or millivolt inputs.
•
I/O module – contains the bus interface and circuitry needed to
perform specific functions related to your application
FLEX I/O thermocouple/mV modules are block transfer modules
that interface analog signals with any Allen-Bradley programmable
controllers that have block transfer capability. Block transfer
programming moves input or output data words between the
module’s memory and a designated area in the processor data table.
Block transfer programming also moves configuration words from
the processor data table to module memory.
Chapter Objectives
The FLEX I/O System
How FLEX I/O Analog
Modules Communicate
with Programmable
Controllers