User Manual
Chapter 2. Hardware Installation
21
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Caution!
A sample of ambient temperature and humidity should be taken at 1.5m above the floor and
0.4m in front of the switch rack, with no protective panel covering the front and rear of the
rack. Short term working conditions refer to a maximum of 48 hours of continued operation
and an annual cumulative total of less than 15 days. Formidable operation conditions refers to
the ambient temperature and relative humidity value that may occur during an air-
conditioning system failure, and normal operation conditions should be recovered within 5
hours.
2.1.1.3
Power Supply
Before powering on the power supply, please check the power input to ensure proper
grounding of the power supply system. The input source for the switch should be reliable and
secure; a voltage adaptor can be used if necessary. The building’s circuit protection system
should include in the circuit a fuse or circuit-breaker of no greater than 240 V, 10 A. It is
recommended to use a UPS for more reliable power supplying. .
Caution!
Improper power supply system grounding, extreme fluctuation of the input source, and
transients (or spikes) can result in larger error rate, or even hardware damage!
2.1.1.4
Preventing Electrostatic Discharge Damage
Static electric discharges can cause damage to internal circuits, even the entire switch. Follow
these guidelines for avoiding ESD damage:
Ensure proper earth grounding of the device;
Perform regular cleaning to reduce dust;
Maintain proper temperature and humidity;
Always wear an ESD wrist strap and antistatic uniform when in contact with circuit boards.
2.1.1.5
Anti-interference
All sources of interference, whether from the device/system itself or the outside environment,
will affect operations in various ways, such as capacitive coupling, inductive coupling,
electromagnetic radiation, common impedance (including the grounding system) and
cables/lines (power cables, signal lines, and output lines). The following should be noted:
Precautions should be taken to prevent power source interruptions;
Provide the system with a dedicated grounding, rather than sharing the grounding with
the electronic equipment or lightning protection devices;
Keep away from high power radio transmitters, radar transmitters, and high frequency
strong circuit devices;
Provide electromagnetic shielding if necessary.
Summary of Contents for QSW-8200 series
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