Cisco Systems 4948E-F manual Fan rotation drops below 7047 RPM ± 150 RPM

Appendix A Power Supply Specifications

300 W AC-Input Power Supply (PWR-C49E-300AC-F)

Table A-3 300 W AC-Input Power Supply (PWR-C49E-300AC-F) Specifications (continued)

Item	Specification
Power supply LEDs
INPUT OK	• Green—The INPUT OK LED is lit green when the power
	supply has detected that the source AC voltage is within limits.
	The input voltage is ≥ 82 VAC ±3 VAC.
	• Red—The INPUT OK LED is red when either of the following
	two situations occurs:
	– In chassis that are equipped with dual power supplies, and
	both are powered on, either INPUT OK LED is lit red if its
	source AC voltage falls below 73 VAC (±3 VAC).
	– In chassis that are equipped with dual power supplies and
	one power supply is powered on and the other power supply
	is powered off, the INPUT OK LED is lit red, rather than
	unlit, on the power supply that is turned off.
	• Off—In chassis that are equipped with a single power supply,
	the INPUT OK LED is off when source AC voltage falls below
	73 VAC (±3 VAC), is not present with the power on/off switch
	turned on, or the power supply is turned off.
OUTPUT OK	• Green—The 12 VDC output is within margins
	(11.30 VDC < output voltage < 12.85 VDC).
	• Red—The OUTPUT OK LED is red when any of the following
	three situations occurs:
	– In chassis that are equipped with a single power supply, the
	12 VDC output is out of tolerance (< 11.30 VDC or
	> 12.85 VDC).
	– In chassis that are equipped with dual power supplies and
	one power supply is powered on and the other power supply
	is powered off, the OUTPUT OK LED is lit red, rather than
	unlit, on the power supply that is turned off.
	– The OUTPUT OK LED is also lit red when a power supply
	fan failure is detected. A fan failure is triggered when the
	fan rotation drops below 7047 RPM ± 150 RPM.
	• Off—In chassis that are equipped with a single power supply,
	the OUTPUT OK LED is off when the power supply is turned
	off.
Weight	2 lb (0.9 kg)

1.The kVA rating listed for the power supply should be used as the sizing criteria for both UPS outputs as well as standard circuits and transformers to power a switch.

Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide

OL-21561-02 A-7