12778474-002-2 Revision F – March 2004
TSG-3800 User’s Guide
69
Installing the TSG-3800
TSG-3800 Expansion Shelves
Making Power Connections
To connect power to the expansion shelf, perform the following steps:
1. Remove PWR A and PWR B fuses from the rear of the expansion shelf.
2. Locate the POWER terminal block. Connect the ‘A’ power feed to the POWER A
terminals. Connect the ‘B’ power feed to the POWER B terminals.
3. Measure the voltage from each –48 vDC to GND (of the Expansion shelf) and
verify the proper level and polarity exists. There is reverse polarity protection for
each input.
4. Measure between ground and chassis and verify that no voltage potential exists
between them.
5. Insert the modules using the procedure in
Installing Modules
, on page 63.
6. Insert the PWR A and PWR B fuses and verify that all modules are receiving
power by checking that their POWER indicators are lit.
Main Shelf and Expansion Shelf Cabling
The expansion shelf receives input signals from the TSG-3800 Main Shelf through a
cable assembly (see
Appendix A, Part Numbers
for a list of parts for the TSG-3800
and TSG-3800E). Refer to
Figure 2-19
for the following example. Using the cable
assembly, you can connect the expansion shelf connector
J1
to the 19-inch Main
shelf connector J9, or J11 on the 23-inch Main Shelf. If you are connecting a second
19-inch Expansion Shelf, connect from the first expansion shelf connector
J11
to the
second shelf connector
J1
. With 23-inch shelves, connect the first 23-inch shelf
connector
J13
to the second shelf connector
J1
.
Table 2-9
lists the connections
required between shelves.
Table 2-9. Expansion Shelf Connections
TSG-3800 19-Inch Shelf
TSG-3800 23-Inch Shelf
TSG-3800E 19-Inch Shelf
FROM
Shelf/
Connector
TO
Shelf/
Connector
FROM
Shelf/
Connector
TO
Shelf/
Connector
FROM
Shelf/
Connector
TO
Shelf/
Connector
Main J9
Expansion #1
J1
Main J11
Expansion #1
J1
Main/J9
Expansion J1
Expansion
#1 J11
Expansion #2
J1
Expansion
#1 J13
Expansion #2
J1
Bus Termination: Install on
J11 of Expansion shelf
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