Ada Bus™ Wiring - Networks (Cont.) - Ada Delta-88 Manual

ADA Bus™ Wiring - Networks (cont.)
When working with larger Delta Systems, you will need to create isolated networks for every
two Delta-88s. This will permit speedier operation of the system from within each Delta-88
network. Thus, if your system houses a total of 32 zones, you will need at least four Delta-88s
and two Delta-88 networks. Please note, that the considerations as listed on the previous two
pages apply, in that the number of actual Delta-88s required per system is not just dependent
on the number of zones when also using: VSM-8 Video Switching Modules, RBM-50 Bass Amp
Modules, or when Slaving RAM-50s. As in this diagram, 32 zones will require the implemen-
tation of four Delta-88 mainframes, each with eight room cards (RAM-50s), and two Delta
networks. If your system houses additional Delta-88s, a Delta-88 network will be required for
every two Delta-88s. Thus, a system with 40 zones will require a total of 5 Delta-88s, where the
first two Delta-88s are on one network, the third and fourth Delta-88 are on a second network,
and the fifth Delta-88 is on yet a third network.
Each Delta-88 network will operate independently of the other with the exception of system
on/off status and complete system "All Off" control (controlled over the System Bus - a 34 pin
flat ribbon cable that connects to all of the Delta-88s - not shown).
The sources form their own network and will operate as a common network to all Delta
Networks. Thus the source related ADA Bus™ components, including the PCT-8, ACC-3000,
MT-3000 and its BI-3000 Bus Isolator, PDF-3000s (not shown), and any BC-232s for computer
source control (CD & Laser library management systems) connect to a specific WH-3000 Wire
Harness. This WH-3000 is the platform of the Source Network and it will feed (transmit and
receive) data to all Delta-88 networks. To prevent one Delta-88 network from falsely
communicating and controlling another Delta-88 network, you will need to isolate the source
network from any and all Delta networks. The BI-3000 Bus Isolator, typically used to isolate
MT-3000s and SSD-66s (THX) from the system's control network, is also used to provide
isolation of the Delta networks. The source networks' data will still receive and transmit to all
Delta networks but the Delta networks won't communicate to each other when using the BI-
3000s.
The end resultant is two or more multi-zone subsystems which select and control the same
group of sources. This networking improves a system's reliability in that no more than 16 zones
are trying to be controlled on any one network, limiting data collision and slowing of the
system's speed of operation. The end result is transparent to the end user.
Special Note. Since the MC-3000 and MC-3800 controls can access, monitor, and control other
rooms in the system, rooms should be grouped together on the same network where this
function will be required. Please note, that if you are in a room on Delta network #1 and you
are attempting to control a room on Delta network #2, the only function you will be able to
perform to that room is System All Off. Rooms that need to be accessed from a single keypad
(i.e. for "Party Mode" control), will need to be situated on the same Delta network.
If you are using a touch screen or computer system controller (i.e. AMX or Crestron) for full
house system control, you will need one BC-232 ADA Bus™ to RS-232 convertor for every
Delta network. Furthermore, you will need one RS-232 port (ADA specified) on the computer
control system for every Delta network.
60