Hardware Configuration
RUBY-9712VG2A User’s Manual
2-5
J3: COM1/COM2 Serial Port Connector
-
COM1
PIN No.
Signal Description
RS-232 RS-422
RS-485
1
DCD (Data Carrier Detect)
TX-
DATA-
2
RXD (Receive Data)
TX+
DATA+
3
TXD (Transmit Data)
RX+
NC
4
DTR (Data Terminal Ready)
RX-
NC
5 GND
(Ground)
GND
GND
6
DSR (Data Set Ready)
NC
NC
7
RTS (Request to Send)
NC
NC
8
CTS (Clear to Send)
NC
NC
9
RI (Ring Indicator)
NC
NC
-
COM2
PIN No.
Signal Description
RS-232
1
DCD (Data Carrier Detect)
2
RXD (Receive Data)
3
TXD (Transmit Data)
4
DTR (Data Terminal Ready)
5 GND
(Ground)
6
DSR (Data Set Ready)
7
RTS (Request to Send)
8
CTS (Clear to Send)
9
RI (Ring Indicator) or +12V
1 5
6 9