Chapter 2 Hardware Configuration
Prox-1750 USER'S MANUAL
Page: 2-7
2-4. COM PORT CONNECTOR
Four COM ports are enhanced in this board namely: JCOM1, COM2,
COM3 and COM4. JCOM1, COM3 and COM4 are fixed for RS-232
while COM2 is selectable for RS-232/422/485.
JCOM1 :
COM1 Connector, DB9 male connector
The JCOM1 Connector assignments are as follows :
PIN ASSIGNMENT
1 NDCD1
2 RXD1
3 TXD1
4 NDTR1
5 GND
6 NDSR1
7 NRTS1
8 NCTS1
9 NRI1
COM2 :
COM2 Connector
The COM2 Connector assignments are as follows :
ASSIGNMENT
PIN
RS-232
RS-422
RS-485
1 NDCD2
TX- TX-
2 RXD2
TX+ TX+
3 TXD2
RX+ RX+
4 NDTR2
RX- RX-
5 GND
GND
GND
6 NDSR2
RTS- NC
7 NRTS2
RTS+ NC
8 NCTS2
CTS+ NC
9 NRI2
CTS- NC
10 NC NC NC
JCOM 1
5
10
1
6
COM2
