Preventing Electrostatic Discharge Damage - Digitalchina Networks DCS-3950 series Manual

2.1.1.3 Power Supply
DCS-3950 series is designed to use modular switching power supplies. The power
input specification is shown below:
Nominal Input Voltage: AC: 100 ~ 240 VAC,
Frequency: 50-60Hz
Total power consumption: ≤30W
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 interference
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
2.1.1.6 Rack Configuration
DCS-3950 series Ethernet switch manual
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