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Note 1: Do not connect to these pins in RS-485 mode.
VSBC-8 Reference Manual
Reference
–
23
S
ERIAL
P
ORT
C
ONNECTORS
See the
Connector Location Diagram
on pages 11 and 12 for connector and cable information.
The pinout of the DB9 connector applies to use of the VersaLogic transition cable #VL-CBL-
2001.
Table 6: Connectors J11/J12 — Serial Port Pinout
COM1
J11
Pin
COM2
J11
Pin
COM3
J12
Pin
COM4
J12
Pin
RS-232
RS-422
RS-485
DB9
Pin
1
11
1
11
DCD
—
—
1
2
12
2
12
DSR
—
—
6
3
13
3
13
RXD*
TxD+
(note 1)
2
4
14
4
14
RTS
TxD–
(note 1)
7
5
15
5
15
TXD*
—
—
3
6
16
6
16
CTS
Ground
Ground
8
7
17
7
17
DTR
RxD–
TxD/RxD–
4
8
18
8
18
RI
RxD+
TxD/RxD+
9
9
19
9
19
Ground
Ground
Ground
5
10
20
10
20
N/C
—
—
—
Note 1:
Do not connect to these pins in RS-485 mode.