EMI
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application system,
adversely affect the switch in the following ways:
• A conduction pattern of capacitance coupling.
• Inductance coupling.
• Electromagnetic wave radiation.
• Common impedance (including the grounding system) coupling.
To prevent EMI, use the following guidelines:
• If AC power is used, use a single-phase three-wire power receptacle with protection earth (PE) to filter
interference from the power grid.
• Keep the switch far away from radio transmitting stations, radar stations, and high-frequency devices.
• Use electromagnetic shielding (for example, shielded interface cables) when necessary.
• To prevent signal ports from getting damaged by overvoltage or overcurrent caused by lightning strikes,
route interface cables indoors only.
Grounding
CAUTION: Reliably ground the switch to protect it from hazards such as lightning shocks,
interferences, and ESD discharges. The switch is grounded through the safety wire in the power
cords. Aruba recommends an independent grounding connection for the chassis if there is any
doubt about the reliability of the grounding through the power mains. The grounding lug is
located on the rear of the switch, at the bottom edge. This figure shows the grounding lug on
the Aruba 6405 switch. On the Aruba 6410 is located in a similar position.
Figure 3: Grounding lug on the Aruba 6405 Switch
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Aruba 6400 Switch Series Installation and Getting Started
Guide
