Cisco Systems 3650 manual Fan Modules, DC-Power Supply Module LEDs

Chapter 1 Product Overview

Rear Panel

Table 1-13	Switch Power Supply Module LEDs (continued)
DC-Power Supply Module LEDs
DC OK		Description	PS OK	Description
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.

For information about replacing a power supply module, wiring a DC power supply module, and module specifications, see Chapter 3, “Power Supply Installation,” and Appendix A, “Technical Specifications.”

Fan Modules

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.

Figure 1-8shows 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.

Note Three fans are required for proper cooling.

Table 1-14 Switch Fan Module

Fan Module		Description
FAN-T1=		Fan module
Figure 1-8	24- and 48-Port Switch Airflow Patterns

ACTV

01X
12X	13X		48PoE+ 4X1G
	24X	25X
		36X	37X
			48X

347812

For information about installing a fan module and fan specifications, see Chapter 4, “Installing the Fan,” and Appendix A, “Technical Specifications.”

	Catalyst 3650 Switch Hardware Installation Guide
OL-29734-01		1-19