Hardware Accessories
159
2
3. Multiple pieces of GV-I/O Box 8 are connected with the PC through separate RS-
485 cables.
After you connect multiple pieces of GV-I/O Box 8 with the PC through separate RS-
485 cables, switch on Terminal Resistance Switches of the connected piece of GV-I/O
Box 8 at the end of each cable.
GV-IO Box 8
(the last of Cable 1)
ON
RS-485 Cable 1
ON
GV-IO Box 8
(the last of Cable 2)
RS-485-
RS-485+
GV-NET/IO Card /
GV-Hub / GV-COM /
GV-NET Card
RS-485 Cable 2
Figure 2-43
Terminal Resistance Switch
The default setting of the Switch is OFF. To switch on the Terminal
Resistance Switch, push the switch downward.