ABB ACS800-67LC, Hardware Manual

Page: 35 / 154

Operation principle and hardware description 35
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PC tool interfaces
The following diagram shows the control interfaces and option modules of the converter.
RDCU and NDCU control units encapsulate the RMIO/AMC boards which are used for
controlling the converter. The units are located in the sliding frame of the auxiliary control
cubicle. With control units a PC tool can be used for parameter change and check, local
control of the converter during the commissioning and remote monitoring of the converter.
It is also possible to read fault indications through a relay output and communicate with the
unit through a serial communication interface. DriveWindow PC tool is used with the
ACS800-67LC.
Control unit of the grid-side converter
The grid-side converter is controlled by its own RDCU control unit. The RDCU is
connected to the grid-side converter power modules by a fiber optic link (distributed
through an APBU optical branching unit in case of parallel connected power modules). In
the grid-side converter module(s) the fiber optic link is connected to the AINT board.
External control
(DO1…3, DI1…6)
To grid To generator
Grid-side converter
Rotor-side converter
Motor Control and
I/O Board (RMIO)
Control unit (RDCU) of
the grid-side converter
Application Control
Board (AMC-33CX)
Control unit (NDCU-33x)
of the rotor-side converter
Fieldbus (CH0)
Fiber optic link
RDCO
CH0
CH1
CH2
CH3
A41
A51
NETA
NAMU
RAIO
ABRU
DO1…3
DI1…7
Slot 1
Slot 2
NIOC-01C
NUIM (INT1)
NTAC (CH1)
NETA (CH4)
ACBU
ACBU (CH7)
CH7