Nuvo-7501 Series
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4.1.1
COM Port Configuration
There are four COM ports for Nuvo-7501 and six COM ports for Nuvo-7505D. The
system’s COM1 and COM2 support RS-232 (full-duplex), RS-422 (full-duplex) and
RS-485 (half-duplex) mode, while COM3 and COM4 support RS-232 mode only. You
can set the COM1/ COM2 operating mode via BIOS settings.
Another option in the BIOS called “
Slew Rate
” defines how sharp the rise/ fall edge
is for the output signal of COM1/ COM2. For long-distance RS-422/ 485 transmission,
you may set the “
Slew Rate
” option as “High” to improve signal quality.