Siemens EF 837 Series Specifiche Pagina 40

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S800 I/O Configuration - Basic Rules and Examples Section 3 Configuration
40 3BSE056248
High Integrity I/O to redundant High Integrity Controllers
In total max 84 modules but limited by:
TB840A Power supply capability.
Required scan cycle time.
Required CPU load.
The optical ModuleBus can be configured for long distances and in star configurations using
TB825 see Long distance distribution in star as Direct I/O to AC 800M on page 42.
NOTE! In a configuration with redundant CPUs, COM3 and the electrical ModuleBus
cannot be used.
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