Cisco Nexus 93120TX Hardware Installation Manual page 13

Overview
1 Screw holes (2) for attaching a front-mount
bracket for 4-post racks (1 bracket on each of 2
sides).
2 Screw holes (4) for attaching a center-mount rack
bracket for 2-post racks (1 bracket for each of 2
sides).
3 A notch in both sides of the chassis for locking
the fan side of the chassis to the bottom-support
rails.
4 Screw holes (2) for attaching the grounding lug
to both sides of the chassis.
Depending on whether you plan to position the ports in a hot or cold aisle, you can order the fan and power
supply modules with port-side intake or port-side exhaust airflow. For port-side intake airflow, the fan and
AC power supply modules have burgundy coloring (DC power supply modules have green coloring). For
port-side exhaust airflow, the fan and AC power supplies have blue coloring (DC power supply modules have
gray coloring). You can also order the 1200-W HVAC/HVDC power supply which has dual-direction airflow
with white coloring. Dual-direction airflow modules automatically use the airflow direction of the other
modules installed in the switch.
The fan and power supply modules are field replaceable and you can replace one fan module or one power
supply module during operations so long as the other modules are installed and operating. If you have only
one power supply installed, you can install the replacement power supply in the open slot before removing
the original power supply.
Note All of the fan and power supply modules must have the same direction of airflow. Otherwise, the switch can
overheat and shut down. If you are installing a dual-direction power supply, that module will automatically
use the same airflow direction as the other modules in the switch.
5 2 power supplies (1 used for operations and 1 used
for redundancy) (AC power supplies shown) with
power supply slot 1 on the left and slot 2 on the
right.
6 2 fan modules with fan slot 1 on the left and fan
slot 2 on the right.
7 Chassis LEDs include the following:
Cisco Nexus 93120TX NX-OS Mode Switch Hardware Installation Guide
• Beacon (BCN)
• Status (STS)
Overview
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