Hardware Configuration
MI979 Series
User’s Manual
25
2
2.5.5
COM1 RS-232/422/485 Port & COM2 RS-232 Port
(CN2)
COM1:
COM2:
1
6
5
9
1
6
5
9
COM1
RS-232/422/485 port is jumper-less and configurable in BIOS.
Pin
Assignment
Pin
Assignment
1
DCD, Data carrier detect
6
DSR, Data set ready
2
RXD, Receive data
7
RTS, Request to send
3
TXD, Transmit data
8
CTS, Clear to send
4
DTR, Data terminal ready
9
RI, Ring indicator
5
Ground
Pin
Assignment
RS-232
RS-422
RS-485
1
DCD
TX-
Data-
2
RXD
TX+
Data+
3
TXD
RX+
NC
4
DTR
RX-
NC
5
Ground
Ground
Ground
6
DSR
NC
NC
7
RTS
NC
NC
8
CTS
NC
NC
9
RI
NC
NC
Summary of Contents for MI979 Series
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