Fan Module - Cisco Catalyst WS-C3850-24T-L Product Overview

Product Overview
Considerations for the WS-C3850-12X48U-L, WS-C3850-12X48U-S and WS-C3850-12X48U-E switch
Note
models:
• The primary power supply for these switch models should be a minimum of 470 W.
• 350 W or 440 W can be used only as secondary power supplies. If the switch draws power from
The power supply modules have two status LEDs.
Table 16: Switch Power Supply Module LEDs
AC OK
DC OK
Off
Green
For information about replacing a power supply module, wiring a DC power supply module, and module
specifications, see the "Power Supply Installation" and "Technical Specifications" chapters.

Fan Module

Depending on the switch model, three or five internal hot-swappable 12-V fan modules (FAN-T1=) are
available. The air circulation system consists of the fan modules and the power supply modules. The airflow
patterns vary depending on the power supply configuration.
When the fan modules are operating properly, a green LED is on at the top left corner of the fan assembly
(viewed from the rear). If the fan fails, the LED turns to amber. The switch can operate with two operational
fans, but the failed fan should be replaced as soon as possible to avoid a service interruption due to a second
fan fault.
The WS-C3850 switches require three fans for proper cooling. The WS-C3850-48XS switches require
Note
five fans for proper cooling.
OL-26779-05
these modules as the primary source, reboot the switch to restore these modules as secondary power
supplies.
Description
No AC input power.
No DC input power.
AC input power present.
DC input power present.
PS OK Description
Off Output is disabled, or input is outside
operating range (AC LED is off).
Output is disabled, or input is outside
operating range (DC LED is off).
Green Power output to switch active.
Red Output has failed.
Catalyst 3850 Switch Hardware Installation Guide
Fan Module
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