jablotron AC-100LCD Quick Manual page 6

Rules for connecting sensors
A total of 36 room thermostats and/or magnetic contacts can be connected
to the AC-116 control unit.
Several sensors can be connected to one channel, but the first connected
sensor must be a room thermostat.
If a room thermostat is connected to several channels, it leads to their
interconnection and the channels then function as one. If you then connect
one sensor to one of the interconnected channels, then this sensor
will be connected to all interconnected channels.
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