Hardware Configuration
IB995
User’s Manual
19
2
2.5.1
COM1 RS-232/422/485 & COM2 RS-232 Serial Port
(J25)
Pin
Signal Name
Pin
Signal Name
1
DCD, Data carrier
detect
2
RXD, Receive data
3
TXD, Transmit data
4
DTR, Data terminal
ready
5
Ground
6
DSR, Data set ready
7
RTS, Request to send
8
CTS, Clear to send
9
RI, Ring indicator
10
N/A
Pin
Signal Name
RS-232
RS-422
RS-485
1
DCD
TX-
DATA-
2
RX
TX+
DATA+
3
TX
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
