Chapter:
BIOS Settings
Integrated Peripherals
page 60
Beckhoff New Automation Technology
CB2051
Onboard Serial Port 3
Options:
Disabled / 3F8/IRQ11 / 2F8/IRQ11 / 3E8/IRQ11 / 2E8/IRQ11
Onboard Serial Port 4
Options:
Disabled / 3F8/IRQ10 / 2F8/IRQ10 / 3E8/IRQ10 / 2E8/IRQ10