
1-4
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 only indoors.
Grounding
Using a good grounding system to protect your switch against lightning shocks, interferences, and
ESD is essential to the operating reliability of your switch. For more information about grounding the
switch, see "Grounding the switch."
Make sure the resistance between the chassis and the ground is less than 1 ohm.
Power
Perform the following tasks to meet the power requirements:
1. Calculate the system power consumption.
The system power consumption varies by card type and density. For more information about
system power consumption calculation, see H3C S10500X Switch Series Hardware
Information and Specifications.
2. Select power modules and identify the number of power modules.
The total maximum output power of all power modules must be higher than the system power
consumption. For more information about available power modules, see H3C S10500X Switch
Series Hardware Information and Specifications.
3. Verify that the power system at the installation site meets the requirements of the power
modules, including the input method and rated input voltage.
Cooling
Plan the installation site for adequate ventilation.
Leave a minimum clearance of 10 cm (3.94 in) around the inlet and outlet air vents.
The rack for the switch has a good cooling system.
The installation site has a good cooling system.
Verify that the airflow design for the chassis meets the airflow design of the installation site.
The direction of the airflow is similar for the S10506X and S10510X chassis. Figure 1-1 uses the
S10506X as an example. Figure 1-2, Figure 1-3, and Figure 1-4 show the direction of the airflow
through the S10508X, S10508X-V, and S10516X chassis, respectively.