In general, the hardware allows a high number of simultaneously activated SSIDs.
Since each activated SSID (even at rest) has a negative impact on the performance of all SSIDs, the maximum number of SSIDs that a device sends simultaneously is limited to 4.
To balance performance with advanced SSID capabilities, the Plasma Cloud Console lets you create an unlimited number of SSIDs that can then be assigned to individual devices on the same network. This allows some devices to send SSIDs that are different from those of other devices.