Octagon XE-900, Справочное руководство

Страница: 42 / 122

42
information on Setup menus see page 36.
If COM5 or COM6 are used for RS–422 or RS–485, and the XE–900 is at the end of
the network, these ports will have to be terminated. Switch 4 terminates the
network. The default setting is terminated. If the XE–900 is not at the end of the
network the switch must be set to unterminated.
COM3 through COM6 all share interrupt 9. Even when these ports are disabled
interrupt 9 is not available for PC/104 devices.
The COM ports configurations are shown in table 4–1. Tables 4–2 through 4–6
show the COM pin-outs for the COM ports, and table 4–7 shows the switch
settings.
Figure 4–1 COM ports
Figure 4–2 VTC-20F cable and null modem adapter
VTC-20F Cable
P3
P2
Null Modem Adapter,
required for serial console
COM2
COM1
Serial Device
on COM2
Serial Device
on COM1
RS–422 or RS–485
Device on COM6
0.100-inch RS–422/485 cable
VTC-20F cable
XE–900
TTL Device on COM5
Up to six serial devices total; four or five
RS–232, one or two RS–422, RS–485, or TTL.
COM3/4 RS–232
COM5 RS–232
COM5 RS–422/485
COM5/6 TTL