For example, a system with 532 camera inputs and 8
monitor outputs requires two video input switch banks
of 256 camera inputs (two card cages per switch bank)
and a video input switch bank of 20 inputs (one card
cage). The outputs are combined in the monitor-select
card cage, which requires three
cards (one
card for each video input switch bank). The 532-camera,
S-monitor system requires a total of six
card cages. Refer to Figure 2-5, Group D.
Follow the procedures in Section
to connect the
cables between two card cages in the same switch bank
(129 256 cameras). Connect the monitor output ribbon
cable connector or BNC connectors on the last card cage
in each switch bank to the corresponding
card in the monitor-select card cage. Connect the monitor
output BNC connectors on the monitor-select cage to
monitors or VCRs. Refer to Figure 2-6.
2.4.3 CARD CAGE INTERCONNECTIONS
The Matrix 44 switching system must be controlled by
a CPU. If the
internal CPU is used,
refer to Instruction Manual X779. If an external CPU
or
is used, the
card cages must be connected to the CPU. Refer to the
appropriate CPU instruction manual.
2.4.3.1 Interconnection Configurations
The card cages can be interconnected serially in a
chain configuration, In the daisy-chain configuration,
the card cages are connected one after another on a
single communication route, starting with the CPU. If
there is a communication failure anywhere in the line,
all card cages beyond that point also become inoperable.
See Figure 2-7.
2.4.3.2 Selecting the Ribbon Cables
The card cages communicate with each other via ribbon
cables. The length of the cable should not exceed 10 feet
(3
Before beginning the interconnection procedures de-
scribed in the next section, it is necessary to select the
proper ribbon cables. The
card cages
are connected to each other via 25-pin D-shell connec-
tors located on the rear panel of the
2.4.3.3 Card Cage Interconnection Procedure
Refer to Figure 2-7 and the appropriate CPU instruction
manual for additional information. Use the following
procedure to install cables from the CPU to the
Follow these procedures if the card
cages are connected in a daisy-chain configuration.
CAUTION:
All card cages in the system must have
A
power turned OFF whenever ribbon cables are
connected to or disconnected from the CPU.
Failure to observe this caution can cause
damage to the modules from static electricity.
1.
2 .
3 .
4 .
5 .
6 .
Set the power switch on the CPU to OFF. Refer to
the appropriate CPU instruction manual.
Select a cable with a 25-pin D-shell rectangular
connector on each end to connect the
CPU to the
Plug the connector on one end of the selected cable
into the appropriate connector on the CPU. Refer to
the CPU instruction manual. Figure 2-7 shows an
example of the Matrix 44 system connected to the
video control CPU.
Route the cable to the
in the first
Matrix 44 card cage.
Set the power switches on all Matrix 44 card cages
to OFF (Figure 2-8). The Matrix 44 card cage switch
can be accessed by loosening the four (4) captive
screws on the front panel of the card cage (Figure
l-l) and removing the front panel.
Connect the CONTROL OUT connector
on the
first
to the CONTROL IN con-
nector J4 on the next
as shown in
Figure 2-7. Continue routing cables as shown in
Figure 2-7 until all connections are complete.
As shown in Figure 2-7, CONTROL OUT connector
on the
rear panel is not always used.
If connector is not used, a cover plate may be installed
over to cover the open connector. Refer to Figure 2-9.
X783-498
2-7