Advantech PCM-9550F Manual do Utilizador Página 39

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Chapter 2 Installation 27
2.18 COM port connector (CN20)
The PCM-9550F/FM/L provides four serial ports (COM1, 3, 4:
RS-232; COM2: RS-232/422/485) in one COM port connector.
The COM port connector is a 40-pin, dual-inline, male header. It
provides connections for serial devices (a mouse, etc.) or a
communication network. You can find the pin assignments for the
COM port connector in Appendix C.
2.18.1 COM2 RS-232/422/485 setting (J9)
COM2 can be configured to operate in RS-232, RS-422, or RS-
485 mode. This is done via J9.
Table 2-6: J9: COM2 RS-232/422/485 select
RS-232* RS-422 RS-485
1-2 Open Open Closed
3-4 Open Closed Open
5-6 Closed Open Open
7-9 Closed Open Open
8-10 Closed Open Open
9-11 Open Closed Closed
10-12 Open Closed Closed
13-15 Closed Open Open
14-16 Closed Open Open
15-17 Open Closed Closed
16-18 Open Closed Closed
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