Cisco Systems C3850NM210G Manual De Usuario

The power supply modules have two status LEDs. 

For information about replacing a power supply module, wiring a DC power supply module, and module 
specifications, see 

The switch has three internal hot-swappable 12-V fan modules. The air circulation system consists of 
the fan modules and the power supply modules. The airflow patterns vary depending on the power supply 
configuration.

 shows the airflow patterns for the 24- and 48-port switches. The blue arrow shows cool air 

flow, and the red arrow shows warm air flow. 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.

Three fans are required for proper cooling.

Off

No AC input power.

Off

Output is disabled, or input is 
outside operating range (AC LED 
is off).

Green

AC input power present.

Green

Power output to switch active.

Red

Output has failed.

Off

No DC input power.

Off

Output is disabled, or input is 
outside operating range (DC LED 
is off).

Green

DC input power present.

Green

Power output to switch active.

Red

Output has failed.