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COM Port Connector: COM1 ~ COM6
This connector is a 16550A high speed communications port that sends/receives 16 bytes
FIFOs. You can attach a serial device to it. COM1 supports RS232/422/485. COM2~4 sup-
port RS232.
COM1
h
RS232
RS422
RS485
COM2 ~ COM6
h
RS232
PIN
SIGNAL
DESCRIPTION
1
NDCD
Data Carrier Detect
2
NSIN
Signal In
3
NSOUT
Signal Out
4
NDTR
Data Terminal Ready
5
GND
Signal Ground
6
NDSR
Data Set Ready
7
NRTS
Request To Send
8
NCTS
Clear To Send
9
VCC
5V or 12V selected by jumper
PIN
SIGNAL
DESCRIPTION
1
422 TXD-
Transmit Data, Negative
2
422 TXD+
Transmit Data, Positive
3
422 RXD+
Receive Data, Positive
4
422 RXD-
Receive Data, Negative
5
GND
Signal Ground
No Connection
6
NC
7
NC
No Connection
8
NC
No Connection
9
VCC
5V or 12V selected by jumper
PIN
SIGNAL
DESCRIPTION
1
485 TXD-
Transmit Data, Negative
2
NC
No Connection
3
485 TXD+
Transmit Data, Positive
4
NC
No Connection
5
GND
Signal Ground
6
NC
No Connection
7
NC
No Connection
8
NC
No Connection
9
VCC
5V or 12V selected by jumper
PIN
SIGNAL
DESCRIPTION
1
NDCD
Data Carrier Detect
2
NSIN
Signal In
3
NSOUT
Signal Out
4
NDTR
Data Terminal Ready
5
GND
Signal Ground
6
NDSR
Data Set Ready
NRTS
Request To Send
7
8
NCTS
Clear To Send
9
RI
Ring Indicator
MS-98J0
2-11
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