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
3-10
Cisco 7500 Series Installation and Configuration Guide
OL-5008-03 B0
Chapter 3 Installing a Cisco 7500 Series Router
Installing the Cisco 7505
Warning
Before working on a chassis or working near power supplies, unplug the power cord on AC units or
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:
Step 1
Loosen the two captive screws that secure the terminal block cover. (See
Figure 3-6
a.)
Step 2
Pull the terminal block cover away from the terminal block. (See
Figure 3-6
b.)
Step 3
Feed the return (RTN) and –48V wires through the large hole in the terminal block cover. (See
Figure 3-6
c.)
Step 4
Attach a nylon cable tie to secure the cable leads to the terminal block cover. (See
Figure 3-6
c.)
Step 5
Attach the RTN and –48V leads to the terminal block. Note the color coding. (See
Figure 3-6
d.) Color
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
Removing the Terminal Block Cover and Attaching Power Cables
Step 6
Attach the ground cable to the ground terminal. (See
Figure 3-6
d.)
Step 7
Replace the terminal block cover. (See
Figure 3-6
b.)
Step 8
Tighten the captive screws on the terminal block cover. (See
Figure 3-6
a.)
Caution: Do not strain the connection at the terminal block
H2537
a
c
d
Terminal block
cover and
captive screws
-48/-60V
20/16A
—
RTN
-48
-48/-60V
20/16A
—
RTN
-48
-48/-60V
20/16A
—
RTN
-48
Ground
terminal
POWER SUPPLY
TERM. BLOCK COVER
- USE ONLY WITH
NEC CLASS 3
WIRING
- USE COPPER
CONDUCTORS
POWER SUPPLY
TERM. BLOCK COVER
- USE ONLY WITH
NEC CLASS 3
WIRING
- USE COPPER
CONDUCTORS
Cable strain relief
nylon cable tie
b