Maintaining Safety With Electricity; Electrostatic Discharge; Preventing Electrostatic Discharge - Cisco 10720 - Internet Router Installation And Configuration Manual

Chapter 2 Preparing for Installation

Maintaining Safety with Electricity

For information on maintaining safety with electricity, see the

Electrostatic Discharge

Electrostatic discharge (ESD) can damage circuit boards if they are handled improperly. Such
mishandling can result in intermittent or complete failures of the board.
When handling circuit boards, observe the following guidelines to prevent ESD damage:
•
•
•
For safety, periodically check the resistance value of the ESD-preventive wrist strap. The resistance
Caution
measurement should be between 1 and 10 megohms (Mohms).

Preventing Electrostatic Discharge

Electrostatic discharge (ESD) damage can occur when electronic cards or components are improperly
handled. ESD can cause complete or intermittent failures. We recommend using an antistatic strap when
you handle a router or one of its components.
Electromagnetic interference (EMI) shielding is an integral component of the router.
Following are guidelines for preventing ESD damage:
•
Figure 2-1
78-13062-10
Always use an antistatic wrist strap and ensure that the strap makes adequate contact with your skin.
Attach an ESD-preventive strap to your wrist, and to the chassis or to a bare metal surface. (See
Figure 2-1.)
The wrist strap protects equipment from ESD voltages on the body only; ESD voltages on clothing
can still cause damage to electronic components.
Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact.
Connect the equipment end of the connection cord to bare metal on the router chassis. (See
Figure 2-1.)
Attaching an ESD-Preventive Strap
RE SE T
CO NS
OL E AU
X
DON NOT
REM OVE
OR INSE
RT CAB
WITH THE
POW ER
AC OK
DC OK
OTF
AC OK
DC OK
OTF
LES
ON
INP UT 100
-200 - 50/6
0Hz 2-5A
Cisco 10720 Internet Router Installation and Configuration Guide
Warnings and Cautions
"Safety Guidelines" section on page 2-2.
2-3