COMMELL LV-651 - Manual (Page 30)

LV-651 User’s Manual Hardware Setup
Serial Port Jumper Setting 30
2.13
The onboard CN_COM1 RS232 serial port, with jumper selectable RS232/422/485 for
CN_COM2
Connector: COM1/2
Type: 9-pin Dip male connector on I/O Panel
Pin Description Pin Description
1 DCD/422TX-/485- 2 RXD/422TX+/485+
3 TXD/422RX+
4 DTR/422RX-
5 GND 6 DSR
7 RTS 8 CTS
9 RI
Jumper: JV1
Type: Onboard 3-pin jumper
JV1 Mode
1-2 COM1 pin-1 for +5V output
2-3 MDCD1-
Default setting
Jumper: JV2
Type: Onboard 3-pin jumper
JV2 Mode
1-2 COM1 pin-9 for +12V output
2-3 MRL1-
Default setting