DCN DCRS-9800 Series, Инструкция по установке

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DCRS-9800 InstallManual Chapter 2 Hardware Installation
2-3
harmful gases will aggravate metal corrosion and the aging of some parts. The chosen
site should avoid harmful gases, such as SO
2
, H
2
S, NO
2
, NH
3
and Cl
2
, etc. The table
below details the threshold values.
Gas Average (mg/m³) Max (mg/m³)
SO
2
0.2 1.5
H
2
S 0.006 0.03
NO
2
0.04 0.15
NH
3
0.05 0.15
Cl
2
0.01 0.3
2.1.4 Preventing Electrostatic Discharge Damage
Static electric discharges can cause damage to internal circuits, even the entire
switch. Follow these guidelines for preventing ESD damage:
1. Ensure proper earth grounding of the device
2. Perform regular cleaning to reduce dust
3. Maintain proper temperature and humidity
4. Always wear an ESD wrist strap and antistatic uniform when in contact with circuit
boards
2.1.5 Anti-interference Requirements
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:
1. Precautions should be taken to prevent power source interruptions
2. Provide the system with a dedicated grounding, rather than sharing the grounding
with electronic equipment or lightning protection devices
3. Keep away from high power radio transmitters, radar transmitters, and high frequency
strong circuit devices
4. Provide electromagnetic shielding if necessary
2.1.6 Rack Configuration