AEG Modicon Micro 84 - L;O Configuration Rules Expanded System

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A maximum of 4 discrete input and 4 discrete output modules may be
installed in one system.
2.2.3.2 l/O Configuration Rules - Expanded System
A Micro 84 Expanded System supports up to fourteen 300 Series l/O
Modules, subject to the following configuration rules.
a)
The maximum number of discrete inputs and outputs combined
cannot exceed 112.
b) A maximum of 14 discrete modules may be installed in one system.
A maximum of eight discrete input or eight discrete output modules
is allowed.
c)
A maximum of 2 analog or register input modules may be installed on
one system.
d)
A maximum of 4 analog or register output modules may be installed
on one system.
e)
Analog or register modules must be physically mounted to the right
of all discrete modules (see Figure 2.2).
Discrete l/O Modules
Discrete (Expanded System Only)
Analog or Register l/O Modules
Figure 2-2. Expanded System Configuration Diagram
Surge withstand specifications for a configuration with more than 8
modules of any type is 1000 VRMS. If a system has 8 or less modules which
are mixed discrete and register, the surge withstand rating is 1500 VRMS.
Systems having a configuration with 8 or less discrete modules have a
surge withstand rating of 2500 VRMS (IEEE 472-1974, ANSI C37.90a).
NOTE
When recording and then reloading a program into the same
controller, remove the P371 Program Pack and then reinsert
it before loading the program. This procedure prevents the
occurence of false error conditions.
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