IBASE IB889 User Manual
Page 19
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INSTALLATIONS
IB889 User’s Manual
15
J2: COM1/2: Serial Port
J2 COM1 serial port connector is jumper selectable for RS-232, RS-422
and RS-485. COM2 serial port support RS-232 only.
Signal Name
Pin #
Pin #
Signal Name
DSR1
Data set ready
2 1 DCD1
Data carrier detect
RTS1
Request to send
4 3 RXD1
Receive data
CTS1
Clear to send
6 5 TXD1
Transmit data
RI1
Ringing indicator
8 7 DTR1
Data terminal ready
Not used
10
9
Ground
DSR2 12
11 DCD2
RTS2 14
13 RXD2
CTS2 16
15 TXD2
RI2 18
17
DTR2
Not used
20
19
Ground
Pin #
Signal Name
RS-232
R2-422 RS-485
1 DCD1 TX- DATA-
2 DSR1 NC
NC
3 RXD1 TX+ DATA+
4 RTS1 RTS1 RTS1
5 TXD1 RX+
NC
6 CTS1 NC
NC
7 DTR1 RX-
NC
8 RI1 NC
NC
9 Ground Ground
Ground
10 NC
NC
NC
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