FSR ML-800 - Manual (Page 40)

40 ML - 800
MULTIPLE ACUs
In order to control more than 16 rooms the Room Combining System has the ability to create groups
that overlap ACUs. The ACU has a TieLine Bus which will, depending on switch settings, allow the
unit to send to, or receive output from a room not present on that unit. This feature is an option and
available only on systems with a FMP (Facility Managers Panel).
The user who wishes to combine multiple Room Combining Systems would have to assign the groups
on each ACU (Audio Control Unit). The user selects the room to be used as the source, then the room
on the other unit to be considered the destination. The output from the source will be sent via the
TieLine to the destination room. The FMP will send update messages to both ACUs and will automati-
cally configure the wallplates effected by the TieLine. Wallplates on the destination room will be set to
mics on, music off to enable the use of the TieLine.
The example illustrated on the next page shows the FMP connected to 2 ACUs. The object is to define
a group containing ACU#1 Rooms 1 and 2 plus ACU#2 Rooms 1 and 2. The FMP would send a Group
message to both ACUs listing ACU#1 Room 1 first making it the source room, then ACU#1 Room 2,
then ACU#2 Room 1 making it the destination room, and finally ACU#2 Room 2.
The source room is the room that feeds the TieLine. The destination room uses the TieLine for input.
There can be only one source which means that if there was an ACU#3 added to this group ACU#2
would use Room 1 as the source for ACU#3 and so on. The first Room listed on ACU#3 would become
the destination as well as the source if an ACU#4 were added.
Jumpers on the ML-800 CPU are set for multiple units. For more information please consult the factory.