No, ACS800 can be connected only via DDCS connection (with NEXA-21 option) to the NETA-21. Modbus connection to ACS800 via the EIA485 is not supported.
Eero is the global product manager for ACS550 and ACS580 general purpose drives. Eero studied engineering at the Aalto university in Finland gaining a Masters degree specializing in electrical engineering. Besides the degree in electrical engineering, Eero holds a Masters degree in Economics and Business Administration.
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