ABB ACS800-104

65
Frame R6i, R7i, R8i and multiples
Inverter units consisting of frame R6i, R7i and R8i inverter modules employ a
separate control unit, RDCU-02C, containing the RMIO board. For the terminals of
the RMIO board, see the chapter Motor control and I/O board (RMIO). For further
information on the RDCU-02C, see the document RDCU-02(C) Drive Control Unit
Hardware Manual (3AFE 64636324 [English]).
A fibre optic link is used to connect the RDCU to the NINT (R6i/R7i) or AINT (R8i)
board in the inverter module. In case of parallel-connected inverter modules, a
PPCS branching unit (type NPBU or APBU) distributes the optical control link to all
the modules.
The switch fuse controller board (ASFC), used in conjunction with R8i modules, also
connects to the AINT board of each inverter module through a fibre optic link.
The connections between the control unit, branching unit (if present), switch fuse
controller and the inverter module are shown in the chapter Circuit diagrams.
DDCS communication
option module 3: RDCO
RMIO X39 for
control panel
connection
Optional module 1
Detachable I/O terminals
Optional module 2
LED indicators
24 V DC power
input
Optical link to AINT/NINT
board of inverter module
(or branching unit)