3/4 SW27 S409 Flow and Consumption Meter Attention: Flow sensors S450 / S401 need to have the bi-directional calibration option to operate in both directions Connection of S330 to S450 via flow switch Connection of S330 to S401 with flow switch 75 mm 362 mm SW17 SW32 S409 (B) S450 1 4 2 3 3 2 4 5 5 6 Connection between S409 and S450 / S452 Flow Meter S331 S409 S450 Modbus S331 S401 S409
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