Mitsubishi Electric AE-200A Service Handbook page 17

[III System restrictions and notes]
(3) When there are 50 or fewer air-conditioning units (apportioned electricity billing function is not used and M-NET transmission of the
AE-200 is not used)
When M-NET is connected to one AE-50 expansion controller, and AE-200 is used without using M-NET transmission line, up to 50
air-conditioning units can be monitored and operated from two AE-200/AE-50 locations.
Also, monitoring and operation from an AE-200 can be performed by connecting an EW-50 in the same way.
・ When using the Web browser function, access each AE-50/EW-50 to perform monitoring and operation.
13