Safety Guidelines; Preventing Electrostatic Discharge Damage; Electrostatic Discharge Prevention; Site Requirement Guidelines - Cisco 7401ASR Installation And Configuration Manual

Safety Guidelines

Safety Guidelines
Following are safety guidelines that you should follow when working with any equipment that connects
to electrical power, or which might be sensitive to electrostatic discharge (ESD) damage.

Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) damage, which occurs when electronic cards or components are
improperly handled, can result in complete or intermittent system failures. Each port adapter consists of
a printed circuit board that is fixed in a metal carrier. Electromagnetic interference (EMI) shielding,
connectors, and a handle are integral components of the carrier. Although the carrier helps protect the
boards, use an antistatic strap whenever handling the port adapter. Handle the carriers by the handle and
the carrier edges only; never touch the boards or connector pins.

Electrostatic Discharge Prevention

Electrostatic discharge (ESD) damage, which can occur when electronic cards or components are
improperly handled, results in complete or intermittent failures.
Use the following guidelines for preventing ESD damage:
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Caution For safety, periodically check the resistance value of the antistatic strap. The measurement should be
between 1 and 10 megaohms (Mohms).

Site Requirement Guidelines

Warning Before you install, operate, or service the system, read the Site Preparation and Safety Guide. This
guide contains important safety information you should know before working with the system.
The environmental monitoring functionality in the Cisco 7401ASR router protects the system and
components from potential damage from overvoltage and overtemperature conditions. To ensure normal
operation and avoid unnecessary maintenance, plan your site configuration and prepare your site before
installation. After installation, make sure the site maintains an ambient temperature of 32°F through
104°F (0°C through 40°C), and keep the area around the chassis as free from dust as is practical.
Planning a proper location for the Cisco 7401ASR router and the layout of your equipment rack or wiring
closet is essential for successful system operation. Equipment placed too close together or inadequately
ventilated can cause system overtemperature conditions. In addition, chassis panels made inaccessible
by poor equipment placement can make system maintenance difficult. Following are precautions that can
help avoid problems during installation and ongoing operation.
Cisco 7401ASR Installation and Configuration Guide
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Always use an ESD wrist or ankle strap and ensure that it makes good skin contact; connect the
equipment end of the strap to an unfinished chassis surface.
Avoid contact between the printed circuit boards and clothing. The wrist strap only protects
components from ESD voltages on the body; ESD voltages on clothing can still cause damage.
Chapter 2 Rack-Mounting, Tabletop Installation, and Cabling
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