Hardware Setup
▍
2-16
Serial Port Connector: COM2 ~ COM6
This connector is a 16550A high speed communications port that sends/ receives
16 bytes FIFOs. You can attach a serial device to it through an optional serial port
bracket.
PIN
SIGNAL
DESCRIPTION
1
2
3
4
5
6
7
8
9
NDCD
NSIN
NSOUT
NDTR
GND
NDSR
NRTS
NCTS
VCC_COM
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
12V or 5V power output,
selected by jumper
10.N
o pin
8.NC
TS
6.ND
SR
4.ND
TR
2.NS
IN
1.ND
CD
3.NS
OUT
5.GN
D
7.NR
TS
9.VC
C_C
OM
PIN
SIGNAL
DESCRIPTION
1
2
3
4
5
6
7
8
9
DCD
RXD
TXD
DTR
GND
DSR
RTS
CTS
VCC_COM1
Data Carrier Detect
Receive Data
Transmit Data
Data Terminal Ready
Signal Ground
Data Set Ready
Request To Send
Clear To Send
Voltage select setting
by J1
RS-232
PIN
SIGNAL
DESCRIPTION
1
2
3
4
5
6
7
8
9
422 TXD-
422 RXD+
422 TXD+
422 RXD-
GND
NC
NC
NC
NC
Transmit Data, Negative
Receive Data, Positive
Transmit Data, Positive
Receive Data, Negative
Signal Ground
No Connection
No Connection
No Connection
No Connection
RS-422
PIN
SIGNAL
DESCRIPTION
1
2
3
4
5
6
7
8
9
485 TXD-
NC
485 TXD+
NC
GND
NC
NC
NC
NC
Transmit Data, Negative
No Connection
Transmit Data, Positive
No Connection
Signal Ground
No Connection
No Connection
No Connection
No Connection
RS-485
