GBL1980 CAN Comunication

Hi, I have trying to connect my GBL1980 controllers to my CANOPEN network, I have tested the system with some smaller nexgen motor controllers, however I cannot communicate with the GBL1980 even though the configuration and wiring are identical as best as I can tell. The GBL1980 node I have set dosent seem to exist, also when I plug into the can network it de-stabilizes the rs232 comms from GBL1980 to PC, I didn't experience this with other controllers.

Could you confirm which the correct pins are for the CAN network, and anything I might try?