General Requirements
38 7705 SAR-M Chassis Installation Guide
The risk of damage to an ESD-sensitive device is reduced considerably after assembly in a
circuit designed to protect sensitive components; however, the following basic precautions
should be taken to reduce ESD to harmless levels.
• Handle all units as if they contained ESD-sensitive devices unless they are known not
to contain ESD-sensitive parts.
• Wear an anti-static ESD strap on your wrist or heel prior to and while touching or
handling units containing ESD-sensitive devices.
• For surfaces with resistance to ground in excess of 100 MΩ, such as ordinary tile,
either cover them with properly grounded static dissipative runners or wax them with
a static dissipative wax.
• Store (even temporarily), pack, and ship units in anti-static bags or containers.
• Do not handle units and components unnecessarily. Use the plastic faceplate to
handle circuit boards.
• Do not use synthetic bristled brushes or acid brushes to clean units.
• Handle failed units with the same precautions as working units.
Grounding
When a 7705 SAR-M chassis is properly installed in a grounded equipment rack, the rack
provides ESD grounding for the chassis. Before a 7705 SAR-M chassis is installed, connect
the ESD wrist strap to a grounded rack or other ground point. After the 7705 SAR-M chassis
is installed in a grounded rack or cabinet, connect the anti-static wrist strap to the ESD strap
ground point on one of the ground studs identified by the wrist strap label.
Warning: .
• The 7705 SAR-M chassis and equipment rack must be properly grounded.
• ESD damage can occur if components are mishandled. A typical grounding point is one
of the ground studs on the 7705 SAR-M chassis or a properly grounded rack or work
bench.
• ESD damage can occur if components are mishandled. Always wear an
ESD-preventive wrist or ankle strap connected to a nearby ground point that is
connected to the site grounding point when working on the 7705 SAR-M.
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