Issue
What is the maximum number of Momentum IO bases allowed on IObus?

Product Line
Modicon Momentum IO

Resolution
An IObus network may consist of as many as 256 nodes, however there are also limitations on the number of I/O words available. The limit is based on the processor type as shown in the following table:

Processor Type	Max. Input Words	Max. Output Words
171CCS76000	128	128
171CCC76010	256	256
171CCC96020	256	256
171CCC96030	256	256

Note: Processors that support IEC are limited to a maximum number of 1408 used I/O points, regardless of the number of modules.