SH-ARC PCI
Manual
Version 01.00
3 Function
3.1 Network Interface Settings
The switchover from RS485 to coax and vice versa is effected
automatically. The RS485 interface is always active on the transmitter
side, so is the coax interface if the COM2002x is configured in an
appropriate way. Only one network line (coax or twisted pair cable) may
be connected at the same time.
3.1.1 Coax Interface
No manual settings are needed, but the interface is only activated if a
valid Bit rate (2.5 - 10 MBit/s) is selected and the controller COM2002x
is operated in Non-Backplane mode[1].
3.1.2 RS485-Interface
The termination can be turned on (S3, S4 ON) or off (S3, S4 OFF).
Default is ON. The COM2002x has to be operated in Backplane
mode[1].
The interface operates at all data rates.
3.2 Access
The SH-ARC PCI adapter is mapped automatically into the I/O or the
memory space by the BIOS of the host computer. The operating system
is able to retrieve start addresses and the interrupt used with the aid of
BIOS functions. The necessary parameters are:
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