User Manual version 2.1
OPEN (660) 120/140/150
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If a touchscreen module is installed, for factory default
setting, its controller will occupy COM3.
COM1 to COM4 are all D-SUB 9-pin connectors. To
connect to any serial device; follow the procedures
below;
1. Turn off the OPEN system and the serial devices.
2. Attach the interface cable of the serial device to the
9-pin D-SUB serial connector. Be sure to fasten the
retaining screws.
3. Turn on the computer and the attached serial devices.
4. Refer to the serial device’s manual for instruction to
configure the operation environment to recognize the
new attached devices.
5. If the serial device needs specified IRQ or address, you
may need to run the CMOS setup to change the
hardware device setup.
If the COM2 is to be set to RS-485 for long distance
transmission, the related onboard jumpers have to be set
correctly first. Refer to section 6.2.1.2 for the RS-
232/485 jumper settings and Appendix D for RS-485
programming.