Cisco 10720 Configuration Guide - Page 45

Power Guidelines, AC-Powered Router

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Chapter 2 Preparing for Installation Environmental Safety Guidelines 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: • 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. AC-Powered Router The AC dual power supply includes two terminal blocks for power redundancy. (See Figure 1-6.) The 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. • Install an uninterruptable power source where possible. • Install proper grounding to avoid damage from lightning and power surges. See the "Safety Guidelines" section on page 2-2 for additional information. See Figure 2-3 for an example of a typical AC power cord. Figure 2-3 AC Power Cord 57977 DC-Powered Router The DC dual power supply includes two terminal blocks for power redundancy. (See Figure 1-7.) 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. 78-13062-10 Cisco 10720 Internet Router Installation and Configuration Guide 2-9

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2-9
Cisco 10720 Internet Router Installation and Configuration Guide
78-13062-10
Chapter 2
Preparing for Installation
Environmental Safety Guidelines
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:
•
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.
AC-Powered Router
The AC dual power supply includes two terminal blocks for power redundancy. (See
Figure 1-6
.) The
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.
•
Install an uninterruptable power source where possible.
•
Install proper grounding to avoid damage from lightning and power surges.
See the
“Safety Guidelines” section on page 2-2
for additional information. See
Figure 2-3
for an
example of a typical AC power cord.
Figure 2-3
AC Power Cord
DC-Powered Router
The DC dual power supply includes two terminal blocks for power redundancy. (See
Figure 1-7
.)
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.
57977