S8901-54XC Hardware Installation Guide | 8
DC Version PSU Overview
1+1, hot swappable power supply unit (PSU) field replaceable unit (FRU). There are two types of DC
PSUs. The picture on the left is the DC PSU with back-to-front airflow, identified with a blue latch.
The picture on the right is the DC PSU for front-to-back airflow, identified with a red latch.
Back-to-Front Airflow PSU
Front-to-Back Airflow PSU
Figure 6.
The DC power supply units are the same size for both back-to-front airflow and front-to-back
airflow. Therefore, only the dimensions for back-to-front airflow PSU will be provided in the figure
below.
(Back-to-Front Airflow PSU)
Figure 7.
