This guide applies to the fanless miniature industrial PC P12 and P13 series, with specific model names and details listed below:
1. Model P12-i5-4200U, Intel Haswell Core i5 CPU, Dual Intel Lan Ports, 4 RS232 COM Ports, 2 RS232/422/485 COM Ports
2. Model P12-i7-4500U, Intel Haswell Core i7 CPU, Dual Intel Lan Ports, 4 RS232 COM Ports, 2 RS232/422/485 COM Ports
3. Model P13-J1900, Intel Haswell Core i5 CPU, Dual Intel Lan ports, 4 RS232 COM ports, 2 RS232/422/485 COM ports
Now we will show how to change 2 RS232 to RS422 and Rs485.
Step 1. Press the "DEL" key continuously while turning on the computer to enter BIOS.
Step 2. Press the arrow key "->" to go to "Advaaced" and select "SIO MISC Configuration".
Step 3. You can see COM1 mode and Com2 mode, you can change RS232/RS485/RS422 anytime as needed.
Step 4. Once you have completed the above changes, use the arrow keys to go to "Save and Exit".
