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Can we integrate premium remote IO rack with M580 HSBY system.

Premium remote I/O drops are not supported in an M580 Hot Standby system. 

All BMEH58•040 Hot Standby CPUs support (e)X80 RIO drops. An (e)X80 RIO drop includes a main rack, and may also include an extended rack. The drop includes (e)X80 I/O modules. 
An (e)X80 RIO drop can be connected via copper cable directly to the main ring, or as a sub-ring. 
(e)X80 RIO drops provide deterministic communication so that (e)X80 RIO modules synchronize with CPU tasks. 

However premium IOs can be integrated to M580 HSBY CPU as DIO by using IO scannnig functionality of M580 CPU or NOC module. 
 
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