2090-CPWM7DF-14AF50 A-B  Communication Interface

This manual shows you how to use your FLEX I/O Analog modules with Allen-Bradley programmable controllers. The manual helps you install, program and troubleshoot your modules. You must be able to program and operate an Allen-Bradley programmable controller to make efficient use of your FLEX I/O modules. In particular, you must know how to program block transfers. We assume that you know how to do this in this manual. If you do not, refer to the appropriate programming and operations manual before you attempt to program your modules. In this manual, we refer to: – the analog input or analog output module as the “input module” or ‘‘output module” – the Programmable Controller as the “controller”

In this chapter, we tell you about: • what the FLEX I/O system is and what it contains • types of FLEX I/O analog modules • how FLEX I/O analog modules communicate with programmable controllers • the features of your analog modules 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 – powers the internal logic for as many as eight I/O modules • 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

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