1 Publication 1794-6.5.12 - September 2011
Chapter
1
Overview of FLEX I/O and Your Thermocouple,
RTD, and Millivolt Input Module
Overview
This chapter provides a description of the FLEX I/O Thermocouple, RTD,
and Millivolt Input module and an overview of how it communicates with
programmable controllers.
The FLEX System
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 system contains
the following components shown below:
• Adapter – transfers read and write configuration data to and from the
I/O module
• Terminal base – contains a terminal strip to terminate wiring for two- or
three-wire devices
• I/O module – contains the bus interface and circuitry needed to
perform specific functions related to your application
Topic Page
The FLEX System 1
Types of Modules 2
What the FLEX I/O Input Module Does 2
The FLEX I/O Module in a Logix Control System 3
Physical Features of Your Module 4
Chapter Summary 5
I/O moduleTerminal baseAdapter
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