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Cisco ASR 903 Router Hardware Installation Guide
OL-25178-05
Chapter1 Cisco ASR 903 router Overview
CiscoASR 903 router Features
AC Power Specifications
Fan TrayThe fan tray modules supported on the router are:
•A903-FAN, Figure1-4
•A903-FAN-E, Figure1-5
The fan tray has the following hardware features:
•It provides side-to-side forced air cooling
•It provides redundant fans
•It is field replaceable
•It contains status LEDs
•It contains an alarm port with four external alarm inputs
For more information about air flow guidelines, see Air Flow Guidelines, page2-11. For instructions on
how to install the fan tray, see Installing the Fan Tray, page3-10. For a summary of the LEDs on the fan
tray, see “LED Summary” section on page5-8
Maximum input voltage -72 VDC
Output voltage +12 VDC
Wire gauge for DC input power connections 12 AWG minimum for -48/-60 VDC.
8 AWG minimum for 24 VDC.
Connector accepts 8 AWG maximum.
Power dissipation 600 W
Table1-3 AC Power Supply Specifications
Part number A900-PWR550-A
Input power specification 115VAC/ 230VAC
Input voltage 85/264 VAC
Minimum input voltage 85 VAC
Maximum input voltage 264 VAC
Minimum output voltage 12V
Maximum output voltage 12.4V
Power dissipation 600 W
Table1-2 DC Power Supply Specifications