Cisco 6503 - Catalyst Firewall Security Sys Installation Manual page 250

Removing and Installing the DC-Input Power Supplies
Step 8 Remove the two screws that secure the left inner terminal block cover. Lift up on the cover to detach the
cover tab from the slot in the power supply. Set the cover and the screws aside.
Step 9 Remove the one screw that secures the right inner terminal block cover. Lift up on the cover to detach
the cover tab from the slot in the power supply. Set the cover and the screw aside.
Step 10 Remove the two plastic insulators from the plastic bag that shipped with the power supply. Position the
larger plastic insulator (eight holes) over the eight-post terminal block (VE-1/VE-2). Align the holes in
plastic with the terminal block posts. The end flap on the insulator should face away from the DC source
cable entry direction.
Position the smaller plastic insulator (four holes) over four-post terminal block VE-3. Align the holes in
Step 11
the plastic with the terminal block posts. The end flap on the insulator should face away from the DC
source cable entry direction.
Fold the end flaps down on both insulators to cover the open side of the terminal blocks (opposite side
Step 12
from cable entry).
Note
Step 13 From the left side of the power supply, connect the power supply ground cable and the source DC cables
to the power supply terminal blocks in this order
Ground cable lug to the ground terminal posts
1.
2. Negative (–) source DC cables to any two pairs of (–) terminal posts (VE-1 and VE-2, VE-1 and
VE-3, or VE-2 and VE-3)
Positive (+) source DC cables to any two pairs of (+) terminal posts (VE-1 and VE-2, VE-1 and
3.
VE-3, or VE-2 and VE-3)
When you tighten the terminal nuts, make sure that they are snug. Do not overtighten them.
Caution
Overtightening the terminal nuts can damage the terminal block. The recommended torque values for
tightening the terminal nuts are 15 inch-pounds (1.7 newton-meters) (minimum) and 20 inch-pounds
(2.2 newton-meters) (maximum).
Catalyst 6500 Series Switches Installation Guide
4-44
Be sure to place a plastic insulator over both terminal blocks, even if you are not attaching source
DC cables to it; this ensures that the plastic insulator is available for future use.
Chapter 4 Removal and Replacement Procedures
(Figure 4-31):
OL-5781-08