Verilink APS Card Replacement (CG) Configuration/Installation Guide - Manual

This procedure describes the steps that should be followed to properly install a replacement Power and Alarm card in
an APC chassis when all card slots are occupied. The Power and Alarm card is located at the extreme left side of the
TxPORT APS chassis (viewed from front of chassis). The installer should read and understand all of the installation
procedures shown in the following paragraphs before proceeding.
1. Before attempting to replace the Power and Alarm card, the installer should verify that he has the following materi-
als and equipment on hand. After verifying that all materials are present, proceed to Step 2.
• Voltmeter
• Wiring tie wraps
• Spare 23 A fuse position and a 3 A, Type 70 fuse
• Replacement Power and Alarm card (Revision 2.63 or higher). The revision is printed at the top of the front panel
CLEI bar code
• TxPORT power/jumper cable (ten foot black and white jumper cable with slide-on connectors)
2. Verify that the front panel of the installed Power and Alarm card does not indicate any blown fuses (A or B) and
that all cards in the shelf appear normal.
3. Attach the provided TxPORT power/jumper cable to the rear wiring pins of the 1050 APC equipment shelf and to
the selected 23 A fuse -48 VDC position. This wiring connection will provide a temporary -48 VDC power arrange-
ment to the APC shelf while the Power and Alarm card replacement is performed.
Caution: The installer must proceed with caution and pay careful attention to all connections and wir-
ing polarity while implementing the temporary -48 VDC wiring connections from the rear panel of the
APC shelf to the spare 23 A fuse position. Failure to proceed with care could result in a loss of power
to the APC shelf.
To install the temporary -48 VDC wiring connection from the APC shelf to the 23 A central office fuse, perform the
following:
1) Remove the fuse from the temporary 23 A fuse position.
2) Connect the black lead of the power/jumper cable to the -48 VDC position of the temporary 23 A fuse.
3) Connect the white lead of the power/jumper cable to the -48 return position of the temporary 23 A fuse.
4) Connect a voltmeter (configured for reading DC volts) to the slide-on connector end of the cable as follows:
Common (–) probe connected to the white lead of the slide-on connector end of the power/jumper cable
Positive (+) probe connected to the black lead of the slide-on connector of the power/jumper cable
5) After connecting the voltmeter, insert a fuse in the temporary 23 A position. The voltmeter should indicate -48
VDC. If the meter indicates +48 VDC, the wiring at the 23 A block is reversed and the installer should correct
and confirm that the voltage reading is -48 VDC.
Caution: Do not proceed until the correct polarity is present at the power/jumper cable.
6) Once -48 VDC is present at the end of the power/ jumper cable, remove the fuse from the temporary 23 A fuse
block.
7) Next, locate C15 at the rear of the 1050 APC chassis (see Figure 1).
8) Locate the bottom right pin of C15 as viewed from the chassis rear. This is pin 35, -48 VDC.
T R A N S P O R T
® APS Shelf Power/Alarm Card
Replacement Guide
Part Number 45-00093 Revision 1.0