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Units with Modbus are 2300, 6600, 8600, 4400, 6400 and MLC 9000-B220. The 6100, 6120, 8100 and 4100 have West ASCII comms protocol as standard, although a special version is available with Modbus instead. These units have a suffix S09 in their model code.All of these models use the Modbus RTU co …
