800-357-104-01, Revision 01
Installing the Power Cables
HMS-357 List 4 and List 5
September 29, 2000
21
Figure 15.
Grounding the Chassis (Right-Hand Side, Rear View)
Step
Procedure (continued)
Installer Check
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ü
ü
ü
All connections to terminal block TB1 must be done to local codes.
7
Connect a 12 AWG gauge wire to the -48 V RTN terminal in position 3 of the Power Access
connector. Connect the opposite end of this wire to the battery return of the CO battery supply at the
fuse panel. If a connector is required, conform to local code.
H
8
Connect a 12 AWG gauge wire to the -48 V RTN terminal in position 4 of the Power Access
connector. Connect the opposite end of this wire to the battery return of the CO battery supply at the
fuse panel. If a connector is required, conform to local code.
H
9
Connect a 12 AWG gauge wire to the -48 VA terminal at position 1 of the Power Access connector
(for slots 1-14). Connect the opposite end of this wire to the -48 Vdc CO battery supply at the fuse
panel. (Fuse is removed.) If a connector is required, conform to local code.
H
10
Connect a 12 AWG gauge wire to the -48 VB terminal in position 2 on the Power Access connector
(for slots 15-28). Connect the opposite end of this wire to the -48 Vdc CO battery supply at the fuse
panel. (Fuse is removed.)
H
11
Install a fuse of appropriate value in the fuse panel tray, based on the power recommendations given
in
“Power Specifications” on page 80
H
12
Close the ferite clamp.
H
13
Connect the fuse panel to the office power supply according to CO guidelines.
H
14
With a voltmeter, verify voltages on the Power Access connector (
). Returns are tied
together. There should be -48 V across pins 1, -48 VA and RTN’s 3 and 4 and pin 2, -48 VB and RTN’s
3 and 4. Returns are tied together.
H
15
Replace the slide panel that covers the Power Access connector by placing the cover over the screws
and aligning the panel holes with the screws. Then slide the panel
1
/
4
-inch to the right until it snaps
into place. Tighten the screws.
H
16
Proceed to
“Connecting the Network Interface” on page 22
H
Installer Signature
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Date
Ground lug
8-32 x ¼ screws
ESD strap input
