21
Preparing for installation
Safety recommendations
To avoid any equipment damage or bodily injury caused by improper use, observe these rules:
•
Before cleaning the switch, unplug the power cord of the switch. Do not clean the switch with wet
cloth or liquid.
•
Do not place the switch near water or in a damp environment. Prevent water or moisture from
entering the switch chassis.
•
Do not place the switch on an unstable case or desk. The switch might be severely damaged in case
of a fall.
•
Ensure proper ventilation of the equipment room and keep the ventilation vents of the switch free of
obstruction.
•
Make sure the operating voltage is as required.
•
To avoid electrical shocks, do not open the chassis when the switch is operating or when the switch
is just powered off.
•
When replacing interface cards, wear an ESD-preventive wrist strap to avoid damaging the cards.
Examining the installation site
The S5500-EI Switch Series must be used indoors. You can mount your switch in a rack or on a
workbench, but make sure:
•
Adequate clearance is reserved at the air inlet and exhaust vents for ventilation.
•
The rack or workbench has a good ventilation system.
•
The rack is sturdy enough to support the device and its accessories.
•
The rack or workbench is well earthed.
To ensure normal operation and long service life of your switch, install it in an environment that meets the
requirements described in the following subsections.
Temperature/humidity
You must maintain a proper temperature and humidity in the equipment room. Long-term high humidity
may lead to bad insulation, electricity leakage, mechanical property changes, and metal corrosion.
However, if the relative humidity is too low, captive screws may become loose as the result of contraction
of insulation washers and static electricity may be produced in a dry environment to jeopardize the
circuits on the device. High temperature is the most undesirable condition, because it accelerates aging
of insulation materials and can thus significantly lower reliability and service life of your switch.
For the temperature and humidity requirements of different switch models, see "
."
