Installations
30
COM4 RS-232/422/485 serial port connector (14-pins pin-header):
JCN2
Pin #
Assignment
Pin #
Assignment
1
DCD (Data Carrier Detect)
2
DSR (Data Set Ready)
3
RXD (Receive Data)
4
RTS (Request to Send)
5
TXD (Transmit Data)
6
CTS (Clear to Send)
7
DTR (Data Terminal Ready)
8
RI (Ring Indicator)
9 Ground
10 Ground
11
TXD+ (Transmit Data+)
12
TXD- (Transmit Data-)
13
RXD+ (Receive Data+)
14
RXD- (Receive Data-)
y
COM4 Figure:
Note: How to connect RS485 device with COM port ribbon cable?
Our Industrial Board encloses a COM port ribbon cable for internal
connection. RS422/485 device must connect to downside D-Sub
with 5-pins cable and signal indication as below.
13
14
1
2
5
9
1
6
RS-422/485:
1: TXD-
2: TXD+
3: RXD-
4: RXD+
5: GND
For RS-422/485 Connector