Connecting To The Dc-Input Power Supply - Cisco 7246 - uBR Router Hardware Installation Manual

Chapter 3 Installing the Cisco uBR7200 Series Router

Connecting to the DC-Input Power Supply

The Cisco uBR7200 series universal broadband router is intended for installation in a Common Bonding
Network (CBN).
Warning Before connecting or disconnecting ground or power wires to the chassis, ensure that power is
removed from the DC circuit. To ensure that all power is OFF, locate the circuit breaker on the panel
board that services the DC circuit, switch the circuit breaker to the OFF position, and tape the switch
handle of the circuit breaker in the OFF position. Use a voltmeter to test for 0 (zero) voltage at the
power terminals on the chassis. Statement 196
When installing or replacing the unit, the ground connection must always be made first and
Warning
disconnected last. Statement 1046
A readily accessible two-poled disconnect device must be incorporated in the fixed wiring. Statement
Warning
1022
This unit is intended for installation in restricted access areas. A restricted access area can be
Warning
accessed only through the use of a special tool, lock and key, or other means of security.
Statement 1017
The color-coding of the DC-input power supply leads depends on the color-coding of the DC power
Note
source at your site. Typically, green or green/yellow is used for ground, black is used for +48V (return),
and red or white is used for –48V. Make certain that the lead color-coding you choose for the DC-input
power supply matches lead color-coding used at the DC power source.
Ensure that the –48V and +48V leads are disconnected from the power source.
Step 1
At the rear of the router, check that the power switch on the power supply is in the OFF (0) position.
Step 2
Connect the two-hole grounding lug on the grounding lead to the M5 grounding receptacles with the two
Step 3
M5 nuts. Tighten the nuts using an 8-mm wrench or nut driver (or adjustable wrench). (See
on page
Figure 3-19 on page 3-25
Note
receptacles. You may also connect the grounding lug to the two horizontally aligned M5 grounding
receptacles.
Step 4 Using a wire stripper, strip approximately 0.55 inch (14 mm) from the –48V and +48V leads. See
Figure
OL-5421-03
3-24.)
shows the grounding lug connected to the two vertically aligned M5 grounding
3-17.
Cisco uBR7200 Series Universal Broadband Router Hardware Installation Guide
Connecting Power
Figure 3-18
3-23