ABB PVS800-57-0100kW-A, Hardware Manual, Page: 26 / 180

24 Introduction to the manual
PLC Programmable logic controller
PPCS Power plate communication system; a protocol used in the optical fiber link that
controls the output semiconductors of an inverter module
RAIO Analog I/O extension module
RDCO DDCS communication module that can be snapped on the RMIO board to add the
available fibre optic channels.
RDCU Control unit. The RDCU is a separate unit consisting of an RMIO board built in a
plastic housing.
RDIO Digital I/O extension module
RFI Radio-frequency interference
RMIO Control and I/O board inside the RDCU control unit
RUSB USB-DDCS adapter for connecting the DriveWindow PC tool to the inverter. The
adapter is connected to the USB port of the PC and to the fiber optic channel of the
RDCO.
Solar array Group of parallel-connected solar strings
Solar array junction
box Device that connects outputs of multiple solar source circuits (strings) into a
combined output circuit or circuits
Solar cell Device that converts light directly into electricity by the photovoltaic effect
Solar generator
The total of all solar strings of a solar power supply system, which are electrically
interconnected
Solar module
Packaged interconnected assembly of solar cells
Solar string Circuit of series-connected solar modules
THD Total harmonic distortion
Term/Abbreviation Explanation