External Connections
VL-586-1 Reference Manual
Installation
–
43
JA, JE – S
ERIAL
P
ORT
C
ONNECTORS
Connectors JA (COM2) and JE (COM1) provide signals for two serial I/O ports. COM1 supports
RS-232 operation only, and COM2 operates in RS-232, RS-422, or RS-485 mode.
Table 16: JA, JE RS-232 Serial Port Connector Pinout
DB 9-Pin Male
JA, JE
Pin
Signal
Name
RS-232 Signal
Description
Signal
Direction
1
DCD
Data Carrier Detect
In
2
RXD*
Receive Data
In
3
TXD*
Transmit Data
Out
4
DTR
Data Terminal Ready
Out
5
Ground
Ground
—
6
DSR
Data Set Ready
In
7
RTS
Request To Send
Out
8
CTS
Clear To Send
In
9
RI
Ring Indicator
In
Table 17: JA RS-422/485 Serial Port Connector Pinout
DB 9-Pin Male
RS-422
RS-485
JA
Pin
Signal
Name
Description
Direction
Signal
Name
Description
Direction
1
N/C
—
—
N/C
—
—
2
TD2+
Transmit Data
Positive
Out
TD2+
Transmit Data
Positive
Out
3
N/C
—
—
N/C
—
—
4
RD2–
Receive Data
Negative
In
TD2/RD2–
Transmit/Receive
Data Negative
Out/In
5
N/C
—
—
N/C
—
—
6
N/C
—
—
N/C
—
—
7
TD2–
Transmit Data
Negative
Out
TD2–
Transmit Data
Negative
Out
8
Ground
Ground
Ground
Ground
—
9
RD2+
Receive Data
Positive
In
TD2/RD2+
Transmit/Receive
Data Positive
Out/In
Note:
In RS-485 mode, do not make connection to pin 2 [TD2+] or pin 7 [TD2–].
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