Power Guidelines; Ac-Powered Router; Dc-Powered Router - Cisco 10720 - Internet Router Installation And Configuration Manual

Chapter 2 Preparing for Installation

Power Guidelines

Caution Read the installation instructions before you connect the router to its power source.
The Cisco 10720 Internet Router requires a 120/220 VAC or –48 VDC dual power supply. Site
requirements differ depending on the type of source voltage. We recommend you follow these
precautions and recommendations when planning power connections to your router:
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AC-Powered Router

The AC dual power supply includes two terminal blocks for power redundancy. (See
grounding screw is located in the terminal block.
The following guidelines will help to ensure your safety and protect the equipment. This list does not
include every potentially hazardous situation, so be alert.
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•
See the
example of a typical AC power cord.
Figure 2-3

DC-Powered Router

The DC dual power supply includes two terminal blocks for power redundancy. (See
The minimum wire gauge size supported on the DC dual power supply is 17 American Wire Gauge
(AWG), which has a 1.5mm wire diameter. The maximum wire gauge size supported on the DC dual
power supply is 10 AWG, which has a 6mm wire diameter.
Wires that are installed in the router power source come from two other external DC power sources. If
the DC power source on Bus B fails, Bus A will continue to power the generator.
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Check the power at your site before installation and periodically after installation to ensure that you
are receiving clean power. Install a power conditioner if necessary.
Install proper grounding, or use the proper grounding receptacle to avoid damage from lightning and
power surges.
Read the safety warnings before you connect the AC or DC power supply to the electrical power at
the local or remote site.
Install an uninterruptable power source where possible.
Install proper grounding to avoid damage from lightning and power surges.
"Safety Guidelines" section on page 2-2
AC Power Cord
for additional information. See
Cisco 10720 Internet Router Installation and Configuration Guide
Environmental Safety Guidelines
Figure 1-6.) The
Figure 2-3 for an
Figure 1-7.)
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