The port status of the MA5605 turns grey on the N2000 BMS.
Version of the N2000 BMS: V200R008B02D061SP24
Version of the MA5605: MA5600 V100R011 B03D065
Install the V100R011 B03D065SP01 patch on the MA5605, and the problem is solved.
The fault of host version causes the port status of the MA5605 grey on the N2000 BMS.
The MA5605 is widely used. It is suggested that you perform the test for each version.