Mitsubishi Electric BAC-HD150 Instruction Manual page 13

* Main and sub system controllers (M-NET)
BAC-HD150 can only be used as the main system controller, but not as a sub system controller.
 Main system controller (Main SC)
Main SC refers to a controller that controls all other system controllers including the units they control. If a given system
has only one system controller, that controller becomes the main SC. Group settings and interlock settings can only be
made from a main SC.
 Sub system controller (Sub SC)
Sub SC refers to a system controller that is controlled (including the units it controls) by a main SC.
BAC-HD150, AG-150A etc.
Main SC's control range
(M-NET)
Sub SC's
control range
Group Group
Note
The system cannot be configured in the following way.
 Groups that are not under the control of a main SC cannot be controlled from a sub SC.
 Each group cannot be under the control of two or more main SC.
 Sub SC cannot be under the control of two or more main SC.
BAC-HD150 is exclusively for use as a main SC. It cannot be used as a sub SC
Group
or controlled from a main SC.
Main SC
Group Group
Main SC 1
Group Group
Main SC 1
Group Group
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Sub SC
Group
Main SC 2
Group
Sub SC Main SC 2
Group Group