Cisco 7500 Series Configuration Manual page 124

Installing the Cisco 7505
R E V I E W D R A F T — C I S C O C O N F I D E N T I A L
Before working on a chassis or working near power supplies, unplug the power cord on AC units or
Warning
disconnect the power at the circuit breaker on DC units. This unit might have more than one power
cord. To reduce the risk of electric shock, disconnect the two power supply cords before servicing
the unit.
Use this procedure to connect power to a DC-input power supply in the Cisco 7505:
Loosen the two captive screws that secure the terminal block cover. (See
Step 1
Pull the terminal block cover away from the terminal block. (See
Step 2
Feed the return (RTN) and –48V wires through the large hole in the terminal block cover. (See
Step 3
Figure
Attach a nylon cable tie to secure the cable leads to the terminal block cover. (See
Step 4
Step 5 Attach the RTN and –48V leads to the terminal block. Note the color coding. (See
code selection depends on the color code of the DC power source at your site. Typically, green or
green/yellow is used for ground, black is used for RTN, and red or white is used for –48V. No matter
which color coding is used, make certain it matches that used at the DC source.
Figure 3-6
a
c
Step 6 Attach the ground cable to the ground terminal. (See
Step 7 Replace the terminal block cover. (See
Step 8 Tighten the captive screws on the terminal block cover. (See
Cisco 7500 Series Installation and Configuration Guide
3-10
3-6c.)
Removing the Terminal Block Cover and Attaching Power Cables
—
-48/-60V
20/16A
RTN -48
Terminal block
cover and
captive screws
Cable strain relief
nylon cable tie
Chapter 3
b
Caution: Do not strain the connection at the terminal block
RTN
d
RTN
Ground
terminal
Figure 3-6d.)
Figure 3-6b.)
Figure
Installing a Cisco 7500 Series Router
Figure 3-6a.)
Figure 3-6b.)
Figure 3-6c.)
Figure 3-6d.) Color
—
-48/-60V
20/16A
-48
—
-48/-60V
20/16A
-48
3-6a.)
OL-5008-03 B0