Apollo 150 - Manual (Page 42)

User Manual version 2207
APOLLO 120/150 III 4-32
If a touchscreen module is installed, for factory default
setting, its controller will occupy COM3.
COM1, 2 & COM4 are all D-SUB 9-pin connectors. To connect
to any serial device; follow the procedures below;
1. Turn off the APOLLO 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-422/485 for long distance
transmission, the related onboard jumpers have to be set
correctly first. Refer to section 6.1.4.3 for the
RS-232/422/485 jumper settings.