COMMELL LV-67M - Manual (Page 23)

LV-67M
User’s Manual
-22-
COM1: RS232 DB9 connector
Pin Signal Pin Signal
1 DCD 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
9 Set by JP1
COM2: RS232/422/485 DB9 connector
Pin Signal Pin Signal
1 DCD/ 422TX-/ 485- 2 RXD/ 422TX+/ 485+
3 TXD/ 422RX+ 4 DTR/ 422RX-
5 GND 6 DSR
7 RTS 8 CTS
9 Set by JP2
Use JCSEL1 and JCSEL2 to select communication mode
COM3/4: COM 20-pin header (Pitch 2.54 x 1.27mm)
Pin Signal Pin Signal
1 DCD1 2 RXD1
3 TXD1 4 DTR1
5 GND 6 DSR1
7 RTS1 8 CTS1
9 COM3 Set by JP3 10 NC
11 DCD2 12 RXD2
13 TXD2 14 DTR2
15 GND 16 DSR2
17 RTS2 18 CTS2
19 COM4 Set by JP4 20 Key