Install Guide

Table Of Contents
Fans
The S5148F-ON switch comes from the factory with two PSUs and four fan modules installed in the switch. The fan modules and the
power supplies, which have integrated fans, are hot-swappable.
In addition to the power supply modules, you can order and install fan modules separately.
The S5148F-ON switch supports two airow direction options. Do not mix airow types in a switch; you can use only a single airow
direction in a switch. If the airow directions are mismatched, you must correct the mismatched airow direction.
Airow is from the I/O panel to the PSU—the red indicator is the normal airow direction.
Airow is from the PSU to the I/O panel—the blue indicator is the reverse airow direction.
All fans and PSUs in a conguration must be in the same airow direction.
Environmental factors can decrease the amount of time required between fan replacements. Check the environmental factors regularly. An
increase in temperature and/or particulate matter in the air might aect performance—for example, new equipment installation).
CAUTION: Check the fans at six-month intervals and replace them as necessary. Regularly monitor the speeds of the fans to
accurately determine replacement intervals.
Topics:
Components
Fan module installation
Components
The following are the S5148F-ON switch fan components:
S5148F-ON switch fan module
S5148F-ON switch fan module—reverse ow
Figure 18. S5148F-ON switch fan modules
1—Fan modules
7
Fans 35