Cisco Systems 4948E-F manual DC-Input Power Supply PWR-C49-300DC

Appendix A Power Supply Specifications

300 W DC-Input Power Supply (PWR-C49-300DC)

300 W DC-Input Power Supply (PWR-C49-300DC)

Figure A-12shows the 300 W DC-input power supply with the major features identified. The PWR-C49-300DC DC-input power supply is supported only on the Catalyst 4948E switch chassis.

Figure A-12 300 W DC-Input Power Supply (PWR-C49-300DC)

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PWR-C49-300DC

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1	Source DC terminal block	3	Power supply LEDs
2	Captive installation screw	4	Power supply handle

Table A-6lists the specifications for the 300 W DC-input power supply (PWR-C49-300DC).

Table A-6 300 W DC-Input Power Supply Specifications

		Item	Specification
		DC-input voltage	• –48 VDC @ 8.33 A for nominal –48 V battery backup system
			(operating range: –40.5 VDC to –56 VDC)
			• –60 VDC @ 6.66 A for nominal –60 V battery backup system
			(operating range: –55 VDC to –72 VDC)
		DC-input current	Nominal range is 6.66 A to 8.33 A
		Power supply output capacity	300 W
		Power supply output	25 A @ 12 VDC
		Output holdup time	8 ms (minimum)
		Heat dissipation	341 BTU/hour (power supply only)
	Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
A-12			OL-21561-02