1. I'm sure there is people with more experience using CNC4PC boards with VSD-A than me. By specs C11T it looks suitable. Generally just connect drive's DIR- and STEP- to 0V and STEP+ and DIR+ to BOB step/dir outputs. Select BOB COM terminal to be ground (0V).
2. No. It takes 55A peak current for 6.3Nm and 18.3A for 2.1Nm. Max peak torque with VSD-A would be 1.7Nm because of 15A limit.