SH ARC-66
Version 03.00
The Node ID = 0, which is not permitted, has an additional feature. If all
the DIP switches are set to “ON”, the Node ID can be adjusted by the
software. Therefore, the card does not become active on part of the
network unless an initialization was carried out by the software.
3.4 Selection of Interfaces
There are two interfaces on the card which cannot be used
simultaneously so that a selection by means of jumpers is necessary.
The coax port is selected by setting the jumpers like the ones in the left
picture. The TWP port is selected by setting the jumpers like the ones in
the right picture.
Please also note the various terminations in the following chapter.
3.5 Bus Termination
Every network line must be terminated. If the SH ARC-66 forms the end
of a line, it has to be terminated there.
There are two ways of termination:
●
externally: here the line termination is attached externally (as BNC
terminators).
●
Internally: The card offers the possibility of internal termination.
The corresponding jumper on the card has to be set as shown
below.
We recommend the external termination. In both cases termination has
to be carried out according to the characteristic impedance of the cable
used (e.g. RG62=93 ohm)
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