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Hardware Configuration
IB981
User’s Manual
19
2
2.5.2
COM3 & COM4 Serial Port (J2)
1
2
19
20
COM3
(pin1 ~ pin10) and
COM4
(pin11 ~ pin20) support RS-232
only.
Pin
Assignment
Pin
Assignment
1
DCD3
2
DSR3
3
RXD3
4
RTS3
5
TXD3
6
CTS3
7
DTR3
8
RI3
9
Ground
10
NC
11
DCD4
12
DSR4
13
RXD4
14
RTS4
15
TXD4
16
CTS4
17
DTR4
18
RI4
19
Ground
20
NC