Automation Studio doesn’t support DBC files unfortunately. To use CANopen, you’ll need an EDS file. Automation Studio also supports some other file formats (which can be imported using Tools → Manage 3rd-Party Devices), but EDS is the most common one, and one I know works with CANopen.
Additionally, I believe that DBC files are used with CAN, not CANopen. CANopen is a communication protocol which uses the CAN network but adds additional layers on top of it. If you want to use plain CAN communication, you’ll need a CAN interface instead of a CANopen one. Some controllers have this built in, but it’s also available as an X20 IF module (X20IF1072/X20IF2772) or an I/O slice (X20CS1070/X20CS2770).
If you want to use a DBC file, you could write a program to extract the information from it and then read the registers it provides using the ArCan library. This is something I’ve looked into in the past. It would take some development work but it’s doable.
I also see J1939 mentioned in your screenshot. Does this device communicate using J1939? If so, you can use mapp J1939 with the CAN interface.