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SmartStack STS16-20D/STS16-20R Token Ring Switches Installation and User Guide Preparing for Installation
•
Before working on the system, unplug the power cord. To avoid the possibility
of electrical shock, unplug the power cord from the outlet before detaching the
power cord from the switch.
•
Disconnect all power before doing the following:
— Installing or removing a chassis
— Working near power supplies
— Performing a hardware upgrade
•
Do not work alone if potentially hazardous conditions exist.
•
Never assume that power is disconnected from a circuit. Always check.
•
Look carefully for possible hazards in your work area, such as moist floors,
ungrounded power extension cables, and missing safety grounds.
•
If an electrical accident occurs, proceed as follows:
— Use caution; do not become a victim yourself.
— Unplug the power cord(s).
— If possible, send another person to get medical aid. Otherwise, assess the
condition of the victim and then call for help.
— Determine if the person needs rescue breathing or external cardiac
compressions; then take appropriate action.
Preventing Electrostatic Discharge Damage
Electrostatic discharge (ESD) can damage equipment and impair electrical
circuitry. It occurs when electronic components are improperly handled and can
result in complete or intermittent failures. Always follow ESD-prevention
procedures when removing and replacing components. Ensure that the chassis is
electrically connected to earth ground using an ESD mat or a ground wire. Wear an
ESD-preventive wrist strap, ensuring that it makes good skin contact. To safely
channel unwanted ESD voltages to ground, connect the clip to an unpainted surface
of the chassis frame. To properly guard against ESD damage and shocks, the wrist
strap and cord must operate effectively. If no wrist strap is available, ground
yourself by touching the metal part of the chassis.
➽ Caution:
For safety, periodically check the resistance value of the antistatic strap,
which should be between 1 and 10 M
Ω
.