Cisco Nexus 92160YC-X, Руководство по установке оборудования

Страница: 25 / 72

port-side exhaust airflow and you must position the module side of the switch in a cold aisle. If there is
burgundy coloring on the fan modules, the switch is configured for port-side intake airflow and you must
position the port side of the switch in a cold aisle.
• Ensure that the chassis can be adequately grounded. If the switch is not mounted in a grounded rack, we
recommend connecting the system ground on the chassis directly to an earth ground.
• Ensure that the site power meets the power requirements for the switch. If available, you can use an
uninterruptible power supply (UPS) to protect against power failures.
Avoid UPS types that use ferroresonant technology. These UPS types can become
unstable with the switch, which can have substantial current draw fluctuations
because of fluctuating data traffic patterns.
Caution
• Ensure that circuits are sized according to local and national codes. Typically, this often requires one or
both of the following:
• AC power supplies typically require at least a 15-A or 20-A AC circuit, 100 to 240 VAC, and a
frequency of 50 to 60 Hz.
• HVAC/HVDC power supplies require the following:
• HVAC input voltage range of 230 to 277 VAC with a frequency of 50 to 60 Hz
• HVDC input voltage range of -240 to -380 VDC
• DC power supplies require the following:
• DC input voltage range of –48 to -60 VDC nominal (self-ranging, –40 to –60 VDC)
• DC line input current (steady state) of 23 A peak at –48 VDC
To prevent loss of input power, ensure the total maximum loads on the circuits
supplying power to the switch are within the current ratings for the wiring and
breakers. Caution
For AC input application, please refer to the statement below:
Note
Statement 1005— Circuit Breaker
This product relies on the building's installation for short-circuit (overcurrent)
protection. Ensure that the protective devices is rated not greater than 20A (North
America), 16A (Europe), and 13A (UK).
Warning
Cisco Nexus 9236C NX-OS Mode Switch Hardware Installation Guide
15
Installing the Switch Chassis
Installation Guidelines