
Integrated Peripherals 
Chapter: BIOS Settings 
Beckhoff New Automation Technology CB2051 
page 57 
ü Onboard Serial Port 3 
Options: 
Disabled / 3F8/IRQ11 / 2F8/IRQ11 / 3E8/IRQ11 / 2E8/IRQ11 
ü Onboard Serial Port 4 
Options: 
Disabled / 3F8/IRQ10 / 2F8/IRQ10 / 3E8/IRQ10 / 2E8/IRQ10