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AlwaysuseanESDgroundingstrapwhenyouarehandlingcomponentsthataresubject
to ESD damage, and make sure that it is in direct contact with your skin.
Ifagroundingstrapisnotavailable,holdthecomponentinitsantistaticbag(seeFigure
113on page293)in one handand touchthe exposed,baremetalof the switch withthe
other hand immediately before inserting the component into the switch.
WARNING: For safety,periodically check the resistance value of the ESD strap. The
measurement must be in the range of 1 through 10 Mohms.
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When handling any component that is subject to ESD damage and that is removed
from the chassis, make sure the equipment end of your ESD strap is attached to the
ESD point on the chassis.
Ifnogroundingstrapisavailable,touchtheexposed,baremetaloftheswitchtoground
yourself before handling the component.
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AvoidcontactbetweenthecomponentthatissubjecttoESDdamageandyourclothing.
ESD voltages emitted from clothing can damage components.
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Whenremovingorinstallinga componentthatissubjecttoESDdamage,alwaysplace
it component-side up on an antistatic surface, in an antistatic card rack, or in an
antistaticbag(seeFigure113on page293).Ifyouarereturningacomponent,placeit in
an antistatic bag before packing it.
Figure 113: Place a Component into an Antistatic Bag
CAUTION: ANSI/TIA/EIA-568 cables such as category 5e and category 6 can get
electrostatically charged. In order to dissipate this charge, always ground the cables
to a suitable and safe earth ground before connecting them to the system.
Related Topics General Safety Guidelines and Warnings for EX Series Switches on page 263•
• See Rear Panel of an EX2200 Switch for the ESD point location.
• See Rear Panel of an EX3200 Switch for the ESD point location.
• See Rear Panel of an EX4200 Switch for the ESD point location.
• See Front Panel of an EX4500 Switch for the ESD point location.
293Copyright©2010,Juniper Networks, Inc.
Chapter20: Power andElectrical SafetyInformation