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S9300, S9300E, and S9300X Series Switches Hardware Installation and Maintenance Guide

This document describes hardware installation procedures of the S9300, S9300E, and S9300X series switches, troubleshooting methods for common hardware faults, and switch maintenance instructions.
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Environmental Requirements for an Equipment Room

Environmental Requirements for an Equipment Room

Equipment Room Environment

Dust on devices may cause electrostatic discharge and result in poor contact for connectors or metal connection points. This problem can shorten the life span of devices and cause faults.

The equipment room must be free from explosive, conductive, magnetically-permeable, and corrosive dust. Table 14-8 lists the requirement for dust concentration in the equipment room.
Table 14-8  Requirements for dust particles in the equipment room

Mechanical active material



Dust particle

Particle /m3

≤ 3x 104

(no visible dust accumulated on a workbench in three days)

Suspending dust



Precipitable dust




  • Dust particle diameter ≥ 5 µm
  • Suspending dust diameter ≤ 75 µm
  • 75 µm ≤ precipitable dust diameter ≤ 150 µm
Take the following measures to meet the requirements:
  • Use dustproof materials for ground, wall, and ceiling construction.
  • Use screens on the door and windows facing outside. The outer windows should be dust-proof.
  • Clean the equipment room regularly and clean the air filter monthly.
  • Wear shoe covers and ESD clothing before entering the equipment room.

Requirements for Corrosive Gases

The room should be free from dusts and corrosive gases, such as SO2, H2S, and NH3. Table 14-9 lists the requirements for the corrosive gas concentration.
Table 14-9  Requirements for corrosive gas concentration

Chemical active material



























Take the following measures to meet the requirements:
  • Avoid constructing the room near a place where the corrosive gas concentration is high, such as a chemical plant.
  • Ensure the air intake vent of the room is in the prevailing upwind direction from any pollution source.
  • Place batteries in different rooms.
  • A professional service should monitor the corrosive gas conditions regularly.

Requirements for ESD Prevention

The absolute value of electrostatic voltage must be less than 1000 V.

Take the following measures to meet this requirement:
  • Train operators about ESD prevention.
  • Keep the correct humidity level in the equipment room to reduce the impact of static electricity.
  • Lay out an ESD floor in equipment rooms.
  • Wear ESD shoes and clothing before entering equipment room.
  • Use ESD tools, such as wrist straps, tweezers, and pullers.
  • Ground all conductive materials in the room, including computer terminals. Use ESD worktables.
  • Keep non-ESD materials (such as common bags, foam, and rubber) at least 30 cm (11.81 in.) away from boards and ESD-sensitive components.

Electromagnetism Requirements for the Equipment Room

All interference sources, inside or outside the equipment room, can cause equipment problems with capacitive coupling, inductive coupling, electromagnetic wave radiation, and common impedance (including grounding system) coupling. Prevent the interference using these approaches:

  • Take effective measures against electrical interference from the power supply system.
  • Do not use the working ground of the equipment as the same ground for surge protection. Separate them as far as possible.
  • Keep the equipment far away from high-power radio transmitters, radar units, and high-frequency and high-current equipment.
  • Use electromagnetic shielding if necessary.
Updated: 2019-05-16

Document ID: EDOC1000069582

Views: 20181

Downloads: 419

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