Filter
Top Products
A-3
Catalyst 4948E and Catalyst 4948E-F Switch Installation Guide
OL-21561-02
Appendix A Power Supply Specifications
300 W AC-Input Power Supply (PWR-C49E-300AC-R)
Table A-1 lists the specifications for the 300 W AC-input power supply (PWR-C49E-300AC-R).
Ta b l e A-1 300 W AC-Input Power Supply Specifications
Item Specification
AC-input type • Autoranging input with power factor correction (PFC).
• Power factor correction is a standard feature. PFC reduces the
reactive component in the source AC current allowing higher
power factors and lower harmonic current components.
AC-input voltage • Low-line (120 VAC nominal)—85 VAC (min) to 132 VAC
(max)
• High-line (230 VAC nominal)—170 VAC (min) to 264 VAC
(max)
AC-input current • 4 A @ 100 VAC (maximum)
• 2 A @ 240 VAC (maximum)
AC-input frequency 47 to 63 Hz
Branch circuit requirements Each chassis power supply should have its own dedicated,
fused-branch circuit:
• For North America—15 A
• For International—Circuits sized to local and national codes
• All AC power supply inputs are fully isolated.
–
Source AC can be out of phase between multiple power
supplies in the same chassis, which means that PS1 can be
operating from phase
A and PS2 can be operating from
phase
B.
–
For high-line operation, the power supply operates with the
line conductor wired to a source AC phase and the neutral
conductor wired either to neutral or to another source AC
phase as long as the net input voltage is in the range of 170
to 264
VAC .
Power supply output 25 A @+12 VDC
Output holdup time 20 ms minimum
kVA rating
1
0.375 kVA
Power supply fan • One temperature-controlled, variable-speed fan
• Airflow direction—Back to front
• The power supply fan has four speed settings. The speed
settings are dependent on the air temperature detected by the
inlet air temperature sensor mounted in the chassis. See
Table A-2 for inlet temperature ranges and corresponding fan
speeds.