M&I – AC 900F Controller 11
Section 1 Overview
AC 900F Controller
The PM 902F or PM 901F CPU module is the core component of an AC 900F
controller. As there are only minor differences in appearance between both CPU
module types, the drawings and photos of the PM 902F included in the present
document also apply to the PM 901F.
The term “controller” used in this manual is equivalent to the term “process station”
in Freelance Engineering or to the precise type designation “AC 900F”.
AC 900F_ Controller.png
Unless a description refers to special features and functions of a specific module
type variant, the general type designations PM, CI, TA, TU etc. are used throughout
this document.
Depending on the application and requirements, the controller can be
complemented by additional modules. These modules are fieldbus communication
interfaces and I/O modules.
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