Preventing Electrostatic Discharge Damage; Safety Warnings; C H A P T E R 3 Installation Safety And Site Preparation - Cisco 1240 Hardware Installation Manual

Preventing Electrostatic Discharge Damage

D E C . 2 0 1 1 — E F T 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
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Preventing Electrostatic Discharge Damage

Electrostatic discharge (ESD) can damage equipment and impair electrical circuitry. It can occur if
electronic printed circuit cards are improperly handled and can cause complete or intermittent failures.
Always follow ESD prevention procedures when removing and replacing modules:
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For the safety of your equipment, periodically check the resistance value of the antistatic strap. It should
Caution
be between 1 and 10 megohms (Mohm).

Safety Warnings

This section contains important safety warnings for the installation and use of the router.
Translated versions of all safety warnings are available in the safety warnings document that shipped
with your router, and which is available on Cisco.com.
Warning IMPORTANT SAFETY INSTRUCTIONS
This warning symbol means danger. You are in a situation that could cause bodily injury. Before you
work on any equipment, be aware of the hazards involved with electrical circuitry and be familiar
with standard practices for preventing accidents. Use the statement number provided at the end of
each warning to locate its translation in the translated safety warnings that accompanied this device.
Statement 1071
Cisco 1240 Connected Grid Router Hardware Installation Guide
3-2
Working near power supplies
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Look carefully for possible hazards in your work area, such as moist floors, ungrounded power
extension cables, frayed power cords, and missing safety grounds.
Do not work alone if hazardous conditions exist.
Never assume that power is disconnected from a circuit. Always check.
Never open the enclosure of the router's internal power supply.
If an electrical accident occurs, proceed as follows:
Use caution; do not become a victim yourself.
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Turn off power to the device.
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If possible, send another person to get medical aid. Otherwise, assess the victim's condition and
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then call for help.
Determine if the person needs rescue breathing or external cardiac compressions; then take
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appropriate action.
Ensure that the router chassis is electrically connected to earth ground.
Wear an ESD-preventive wrist strap, ensuring that it makes good skin contact. Connect the clip to
an unpainted surface of the chassis frame to channel unwanted ESD voltages safely to ground. To
guard against ESD damage and shocks, the wrist strap and cord must operate effectively.
If no wrist strap is available, ground yourself by touching a metal part of the chassis.
Chapter 3 Installation Safety and Site Preparation
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