Download and install any specific drivers for your keyboards from the manufacturers' websites.
Connect your keyboards to separate USB ports on your computer. If you do not have enough available USB ports, you may need to use a USB hub.
Configure the MIDI channels for your keyboards. Some keyboards have a button for this, while others may require software from the manufacturer. There are 16 available numbered MIDI channels. Make sure the MIDI channels for each keyboard are different.
Open your DAW software.
Create two new MIDI tracks.
Select the appropriate MIDI channels in the MIDI track options. Assign each track to receive MIDI data from only one of the two different MIDI keyboard channels.