The second cabinet on Channel 1 contains the SCC. The SCC’s transponder number is 6. Its associated wiring
diagram number is 3981;743.
Now . . .
look at the third entry in the table. The cabinet number is specified as “1. ” That means that this cabinet
contains transponders. Under the “TRANSPONDER NUMBER(S)” column, we see that transponder numbers 2,
3, and 4 are included in cabinet number 1. The wiring diagram number for this cabinet is 3981-745. Notice also that
the “POWER LINE INTERCONNECTION” column indicates that the line from cabinet number 1 is used to
provide power for the equipment in cabinet number 2.
The fourth entry in the first table refers to cabinet number 2. You can see that transponder number 5 is included
in this cabinet. The wiring diagram number for cabinet number 2 is 3981-746. Also, we know that the transponder
located in cabinet number 2 is powered by equipment located in cabinet number 1 (see table entry for cabinet
number 1).
The table for Channel 2 is interpreted in the same way. The information provided on this drawing for your system,
will be quite similar.
Data and Power Line Interconnections
Data and power line interconnections are illustrated on the same system interconnection drawing (see sample,
Figure 25). This system interconnection drawing also includes:
l
Local BT Monitor and Control Point wiring (if the BMUX is equipped with a local BT).
l
RS232C port numbers and remote device connections.
l
Celestra clock connections (if the BMUX is equipped with a Celestra interface board).
On this system interconnection drawing, all contractor wiring is denoted by dashed lines. The connections
illustrated are “typical” . . .
meaning that you must determine the way in which your system is configured for each
data and power line interconnection.
The circled portion of Figure 25 is shown enlarged in Figure 26. Here, the BMUX local BT and AC I/O board
connections are shown. In the case of local BT connections (TB2 and TB3 in Figure 26), a reference is made to
“FIG. Kl .” This refers to Figure Kl on the M-21 20 initiating wiring diagram. Refer to this diagram to determine how
to connect the external device(s) required to the local BT I/O board.
Audio and Telephone Line Interconnections
Audio and telephone line interconnections (if applicable to your system) are listed on the same system
interconnection drawing (see sample, Figure 27). This system interconnect drawing also shows how the audio
Control Points can be wired (the audio sub-riser configuration). However, specific audio Control Point wiring is
shown in the system’s individual cabinet drawings.
On this system interconnection drawing, all contractor wiring is denoted by dashed lines. The connections
illustrated are “typical” . . . meaning that you must determine the way in which your system is configured for each
audio and telephone line interconnection.
26
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