Cisco 4948 - Catalyst Switch - DC-Input Power Supply (PWR-C49-300 DC

A-12
Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
OL-21561-02
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-12 shows 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)
Table A-6 lists the specifications for the 300 W DC-input power supply (PWR-C49-300DC).
1 Source DC terminal block 3 Power supply LEDs
2 Captive installation screw 4 Power supply handle
196261
1
3
4
2
PWR-C49-300DC
PWR-C49-300DC
Ta b l e 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)