H3C S5120-EI series Installation Manual

Also see for S5120-EI Series: Configuration guide Installation manual Configuration guide Configuration guide Operation manual

Contents

H3C S5120-EI series Installation Manual Manual pdf 10 page image

2CleannessDust buildup on the chassis might result in electrostatic adsorption, which causes poor contact of metalcomponents and contact points, especially when indoor relative humidity is low. In the worst case,electrostatic adsorption can cause communication failure.Table 1 Dust concentration limit in the equipment roomSubstance Unit Concentration limitDust Particles/m³ ≤ 3 x 104 (no visible dust on the tabletop withinthree days)NOTEThe dust particle size ≥ 5 μm.The equipment room must also meet strict limits on salts, acids, and sulfides to eliminate corrosion andpremature aging of components, as shown in Table 2.Table 2 Harmful gas limits in the equipment roomGas Maximum concentration (mg/m 3 )SO2 0.2H2 S 0.006NH3 0.05Cl2 0.01EMIAll electromagnetic interference (EMI) sources, from outside or inside of the switch and applicationsystem, adversely affect the switch in a conduction pattern of capacitance coupling, inductance coupling,electromagnetic wave radiation, or common impedance (including the grounding system) coupling. Toprevent EMI, take the following actions:• As the AC power system is a TN system, use a single-phase three-wire power receptacle withProtection Earth (PE) to filter interference from the power grid.• Keep the switch far from radio transmitting stations, radar stations, and high-frequency devices.• Use electromagnetic shielding when necessary, for example, use shielded interface cables.• Route interface cables only indoors to prevent signal ports from getting damaged by overvoltage orovercurrent caused by lightning strikes.Laser safetyThe S5120-EI Switch Series is a line of Class 1 laser devices.CAUTION:When a fiber port on an S5120-EI switch is operating, do not stare into the fiber port because the laserlight emitted from the optical fiber might hurt your eyes.