ABB AC 800M

PM8xx/TP830 Processor Unit – General Section 1 Introduction
34 3BSE 027 941 R301
Figure 6 on page 35 provides examples of various ways to connect the S800 I/O
units. It can be seen, at the top right-hand area of Figure 6 on page 35, that one
cluster (or group) of units (maximum number of units per cluster is 12) is connected
to the electrical ModuleBus of an AC 800M Controller. However, a further seven
clusters (each comprising up to 12 units) can be added to the optical ModuleBus,
thus achieving a total count of 96 units per AC 800M Controller when using only
the ModuleBus.
To the left on Figure 6 on page 35, there is a PROFIBUS DP segment. This allows
for a large increase in the numbers of units connected to each AC 800M Controller.
Here the segment is shown as having an FCI unit (type CI830), connected to the
PROFIBUS DP network. The use of FCI units allows the selection of units from
several I/O families.
For further examples refer to the relevant documentation for the I/O system in
question.