Preventing Electrostatic Discharge Damage - Cisco 4948 - Catalyst Switch Installation Manual
Installation guide
Hide thumbs
Also See for 4948 - Catalyst Switch:
- Datasheet (18 pages) ,
- Product bulletin (4 pages) ,
- Datasheet (16 pages)
Table of Contents
Advertisement
System Grounding
•
•
•
•
•
•
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) damage, which can occur when modules or other FRUs are improperly
handled, results in intermittent or complete failures. Modules consist of printed circuit boards that are
fixed in metal carriers. Electromagnetic interference (EMI) shielding and connectors are integral
components of the carrier. Although the metal carrier helps to protect the board from ESD, always use
an ESD grounding strap when handling modules.
To prevent ESD damage, follow these guidelines:
•
Note
•
Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
2-10
If any of the following conditions occur, contact the Cisco Technical Assistance Center:
The power cable or plug is damaged.
–
An object has fallen into the product.
–
The product has been exposed to water or other liquids.
–
The product has been dropped or shows signs of damage.
–
The product does not operate correctly when you follow the operating instructions.
–
Use the correct external power source. Operate the product only from the type of power source
indicated on the electrical ratings label. If you are not sure of the type of power source required,
consult the Cisco Technical Assistance Center or a local electrician.
Use approved power cables only. You have been provided with one or more power cables with your
chassis power supply that are intended for use in your country, based on the shipping location.
Should you need to purchase additional power cables, ensure that they are rated for the product and
for the voltage and current marked on the product's electrical ratings label. The voltage and current
rating of the power cable should be greater than the ratings marked on the label.
To help prevent electrical shock, plug all power cables into properly grounded electrical outlets.
These power cables are equipped with three-prong plugs to help ensure proper grounding. Do not
use adapter plugs or remove the grounding prong from a power cable.
Observe power strip ratings. Make sure that the total current rating of all products that are plugged
into the power strip does not exceed 80 percent of the power strip rating.
Do not modify power cables or plugs yourself. Consult with a licensed electrician or your power
company for site modifications. Always follow your local and national wiring codes.
Always use an ESD wrist strap and ensure that it makes maximum contact with bare skin. ESD
grounding straps are available with banana plugs, metal spring clips, or alligator clips. If you choose
to use the disposable ESD wrist strap supplied with most FRUs or an ESD wrist strap equipped with
an alligator clip, you must attach the system ground lug to the chassis in order to provide a proper
grounding point for the ESD wrist strap.
This system ground is also referred to as the network equipment building system (NEBS)
ground.
If your chassis does not have the system ground attached, you must install the system ground.
Chapter 2
Preparing for Installation
OL-21561-02
Hide quick links:
Advertisement
Table of Contents
Troubleshooting
