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Gas
Cl
2
EMI requirements
All electromagnetic interference (EMI) sources, from outside or inside of the switch and application
system, adversely affect the switch in a conduction pattern of capacitance coupling, inductance coupling,
electromagnetic wave radiation, or common impedance (including grounding system) coupling. To
prevent EMI, perform the following steps:
•
Take measures against interference from the power grid.
Do not use the switch together with the grounding equipment or lightning-prevention equipment of
•
power equipment, and keep the switch far away from them.
•
Keep the switch far away from high-power radio launchers, radars, and equipment with high
frequency or high current.
Use electromagnetic shielding when necessary.
•
Grounding requirements
Using a good grounding system to protect your switch against lightning shocks, interferences, and ESD
is essential to the operating reliability of your switch. Make sure the resistance between the chassis and
the ground is less than 1 ohm. For more information about the grounding methods of the S7508E-X
Switch, see "Installing the switch."
Power supply requirements
Perform the following steps to satisfy the power supply requirements of the S7508E-X Switch:
1.
Calculate the system power consumption
The system power consumption of an S7508E-X switch depends on the card type and quantity,
and fan tray power consumption. For more information about the system power consumption of the
S7508E-X Switch, see "Appendix A Technical specifications."
2.
Select power modules according to the system power consumption
To ensure correct operation of the switch, make sure the maximum output power of the power
module that supplies power to the switch is higher than the system power consumption of the switch.
After determining the system power consumption of the switch, you can select appropriate number
of power modules according to the power consumption requirement of your switch. For more
information, see "Appendix B FRUs and compatibility matrixes."
3.
Check that the power supply system on the installation site satisfies the input requirements of the
power modules and parameters such as rated voltage.
Cooling requirements
For adequate heat dissipation, plan the installation site according to the airflow of your switch, and
adhere to the following requirements:
Leave a clearance of at least 10 cm (3.94 in) around the air intake and exhaust vents.
•
Max. (mg/m
)
3
0.01
4
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Troubleshooting
