03 POWER ELECTRONICS AND CABINET FEATURES
3BHS212794 E01 REV M ACS6000 USER MANUAL 60/278
3.2.5 Control unit (COU)
The COU incorporates the hardware for the control, monitoring and
protection functions of the drive, and the communication interfaces to
the local control panel and to the remote control hardware.
3.2.5.1 COU versions
The number of COUs in the drive depends on the configuration and
application of the drive:
• Typically, an ARU in combination with an inverter unit (INU) shares
the control unit of the first INU.
Depending on the selected options and the configuration of the
drive, a separate control unit is used for the ARU.
If an LSU is part of the drive, all rectifier- and line-related functions
are implemented in the control unit of the INU.
• A separate control unit is assigned to each INU that supplies a
single motor.
• If several INUs supply one motor, they share one control unit.
Note: For information on the number of control units and their location in
the drive, see “Appendix C – Mechanical drawings”.
The hardware components of a COU are fitted on a swing frame. The size
of the swing frame and the mounting position of the components depend
on the cabinet version where the swing frame is installed in Fig. 3-11.
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