Siemens simatic c7-621 - Page 14

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C7-621 / C7-621 AS-i Control Systems
C79000-G7076-C621-01
The C7 has two independent units that communicate with each other via an
internal MPI interface.
S C7 CPU with C7 AS-i CP
S C7 OP
When necessary, these units are dealt with separately in the manuals.
C7-621 AS-i Units
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