Preventing Electrostatic Discharge Damage - Cisco Universal Broadband Router uBR10012 Hardware Installation Manual

Preventing Electrostatic Discharge Damage

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Warning Only trained and qualified personnel should be allowed to install, replace, or service this equipment.
Statement 1030.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which occurs when electronic cards or components are
improperly handled, can result in complete or intermittent failures. The performance routing engine
(PRE), and all line cards consist of a printed circuit card that is fixed in a metal carrier. Electromagnetic
interference (EMI) shielding and connectors are integral components of the carrier. Although the metal
carrier helps to protect the cards from ESD, use an antistatic strap each time you handle the modules.
Handle the carriers by the edges only; never touch the cards or connector pins.
Always tighten the captive installation screws on all system components when you are installing them.
Caution
These screws prevent accidental removal of the module, provide proper grounding for the system, and
help to ensure that the bus connectors are properly seated in the backplane.
Following are guidelines for preventing ESD damage:
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For safety, periodically check the resistance value of the antistatic strap. The measurement should be
Caution
between 1 and 10 megohms.
Cisco uBR10012 Universal Broadband Router Hardware Installation Guide
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Do not wear loose clothing, jewelry (including rings and chains), or other items that could get caught
in the chassis.
The Cisco uBR10012 router operates safely when it is used in accordance with its marked electrical
ratings and product usage instructions.
Always use an ESD-preventive wrist or ankle strap and ensure that it makes good skin contact.
Before removing a card from the chassis, connect the equipment end of the strap to a bare metal,
unpainted surface on the chassis or rackmount.
Handle line cards by the faceplates and carrier edges only; avoid touching the card components or
any connector pins.
When removing a line card, place the removed module component-side-up on an antistatic surface
or in a static-shielding bag. If the module will be returned to the factory, immediately place it in a
static-shielding bag.
Avoid contact between the modules and clothing. The wrist strap protects the card from ESD
voltages on the body only; ESD voltages on clothing can still cause damage.
Chapter 2 Preparing for Installation
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