SOM-DB4700 User Manual
6
COM1
COM Port 1 Connector
Pin
Pin Name # : low active
1
NDCD#1
2
NRXD1
3
NTXD1
4
NDTR#1
5
GND
6
NDSR#1
7
NRTS#1
8
NCTS#1
9
COMA
10
GND
11
GND
COM2
COM Port 2 Connector
Pin
Pin Name # : low active
1
NDCD#2
2
NDSR#2
3
NRXD2
4
NRTS#2
5
NTXD2
6
NCTS#2
7
NDTR#2_RXD485-
8
COMB
9
GND
10
NC
COM3
COM Port 3 Connector
Pin
Pin Name # : low active
1
NDCD#3
2
NDSR#3
3
NRXD3
4
NRTS#3
5
NTXD3
6
NCTS#3
7
NDTR#3_RXD485-
8
COMC
9
GND
10
NC
