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.
Released for:Schneider Electric Canada
