Rack mounting
When you prepare your equipment rack, ensure that the rack is grounded.
Ground the equipment rack to the same ground point the power service in your area uses. The ground path must be permanent.
Switch ground
Dell Technologies recommends you ground your switch. Use the Z9432F-ON switch in a common bond network (CBN).
Connect the grounding cables as described in
.
NOTE:
For an AC-powered switch, although the third conductor of the AC power cable provides a ground path, Dell
Technologies recommends grounding your switch with a dedicated ground wire.
NOTE:
For a DC-powered switch, the only way to safely ground your switch is to attach a dedicated ground wire. The
ground lug ships inside the DC PSU shipping box. The two ground lug screws ship attached to the switch. Before you install
the DC switch in a rack, attach the ground lug to the switch using the included screws. Next attach the DC ground wire to
the ground lug. The DC-powered switch ships with the DC ground lug and screws.
Fans and airflow
The Z9432F-ON switch fans support two airflow options: normal and reverse.
Fan combinations
Fan installation is done as part of the factory install based on stock keeping unit (SKU) type. The Z9432F-ON switch has SKUs
that support the following configurations:
●
AC PSU with fan airflow from the I/O to the PSU—normal—the red indicator is the normal airflow direction.
●
DC PSU with fan airflow from the I/O to the PSU—normal—the red indicator is the normal airflow direction.
With the addition of the fan reversal kit, the Z9432F-ON switch has SKUs that also support the following configurations:
●
AC PSU with fan airflow from the PSU to the I/O—reverse—the blue indicator is the reverse airflow direction.
●
DC PSU with fan airflow from the PSU to the I/O—reverse—the blue indicator is the reverse airflow direction.
Order the fans suitable to support your site ventilation. Use a single type of fan airflow.
CAUTION:
Switches with fan airflow from the PSU to the I/O—reverse airflow—are subject to tighter
restrictions for power consumption on cables and optics that are used for 400 GbE ports. Reverse airflow
switches do not support high-power cables or optics. 400 GbE transceivers and active cables may exceed the
supported threshold.
CAUTION:
To avoid damage to the switch, fan and PSU airflow directions must match. Do not mix normal and
reverse airflows in a single switch.
For proper ventilation, position the switch in an equipment rack or cabinet with a minimum of 12.7 cm (5 inches) of clearance
around the exhaust vents. When you install two Z9432F-ON switches near each other, to permit proper airflow, position the
two switches at least 12.7 cm (5 inches) apart. The fan speed varies based on internal temperature monitoring. The Z9432F-ON
switch never intentionally turns off the fans.
For more information, see
.
Site preparations
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