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ESD prevention
ESD prevention guidelines
To prevent electrostatic discharge (ESD), follow these guidelines:
•
Make sure the firewall, the workbench, and the rack are reliably grounded.
•
Take dust-proof measures for the equipment room. For more information, see "
•
Maintain the humidity and temperature at an acceptable level. For more information, see
"
•
Put the removed interface modules away on an ESD workbench, with the PCB upward, or put
them in ESD bags for future use.
•
Always wear ESD clothing, ESD gloves, and an ESD wrist strap.
Wearing an ESD wrist strap
No ESD wrist strap is provided with the firewall. Purchase one yourself.
Before you attach an ESD wrist strap, make sure the rack or the workbench is reliably grounded.
To attach the ESD wrist strap:
1.
Wear the wrist strap on your wrist.
2.
Lock the wrist strap tight around your wrist to keep good contact with the skin.
3.
Secure the wrist strap lock and the alligator clip lock together.
4.
Attach the alligator clip to the rack or the workbench.
Figure1-4 Attaching an ESD wrist strap
(1) ESD wrist strap
(2) Lock
(3) Alligator clip
EMI
All electromagnetic interference (EMI) sources, from outside or inside of the firewall and application
system, adversely affect the firewall in the following ways:
•
A conduction pattern of capacitance coupling.
•
Inductance coupling.
•
Electromagnetic wave radiation.
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