For
n
+1 redundancy, you can use one or two power sources for the two power supplies. For
n
+
n
redundancy,
you must use two power sources and connect each power supply to a separate power source.
Note
Some of the power supply modules have rating capabilities that exceed the fabric interconnect requirements.
When calculating your power requirements, use the fabric interconnect requirements to determine the amount
of power that is required for the power supplies.
Note
To minimize the possibility of circuit failure, make sure that each power-source circuit that is used by the
fabric interconnect is dedicated to the fabric interconnect.
For AC input application, please refer to the following statement:
Note
Statement 1005—
Circuit Breaker
This product relies on the building's installation for short-circuit (overcurrent) protection. Ensure that the
protective devices are rated not greater than 20A (North America), 16A (Europe), and 13A (UK).
Warning
For the power cables to use with the power supplies, see
.
Note
Airflow Requirements
The fabric interconnect is positioned with its ports in either the front or the rear of the rack depending on your
cabling and maintenance requirements. You must have fan and power supply modules that move the coolant
air from the cold aisle to the hot aisle in one of the following ways:
• Port-side exhaust airflow—Cool air enters the chassis through the fan and power supply modules in the
cold aisle and exhausts through the port end of the chassis in the hot aisle.
You can identify the airflow direction of each fan and power supply module by its coloring. Blue or dark grey
coloring indicates port-side exhaust airflow.
To prevent the fabric interconnect from overheating and shutting down, you must position the air intake for
the fabric interconnect in a cold aisle. The fan and power supply modules must have the same direction of
airflow (even if their coloring is different). If you must change the airflow direction for the fabric interconnect,
you must shutdown the fabric interconnect before changing the modules.
Note
Preparing for Installation
4
Preparing for Installation
Airflow Requirements
