Control unit 139
11
Control unit
This chapter describes the connections of the BCU control unit and the internal AC500
PLC of the inverter, and contains the specifications of the inputs and outputs of the control
unit. The PLC is only internal to the inverter and cannot be used for external plant control.
BCU control unit
The BCU-12 control unit is used in the inverter. The BCU is mounted separately from the
inverter modules, and connected to the modules by fiber optic cables.
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