HP FlexFabric 11908-V, Руководство по установке

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4
Table 5 Harmful gas limits in an equipment room
Gas Max. (mg/m
3
)
SO
2
0.2
H
2
S 0.006
NH
3
0.05
Cl
2
0.01
EMI
All 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 the grounding system) coupling. To prevent EMI, take the following
actions:
•
Take measures against interference from the power grid.
• Use a grounding system and lighting protection system for the switch separate from those for other
electric equipment, and keep them far away as possible.
•
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.
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.
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 "
Appendix A Chassis views and technical
specifications ."
2. Select power supplies and identity the number of power supplies.
The total maximum output power of all power supplies must be higher than the system power
consumption. For more information about available power supplies, see "
Appendix B FRUs and
compatibility matrixes ."
3. Verify that the power system at the installation site meets the requirements of the power supplies,
including the input method and rated input voltage.
Cooling
Plan the installation site for adequate ventilation.