user manual

2-67
Cisco ASR 9000 Series Aggregation Services Router Overview and Reference Guide
OL-17501-09
Chapter 2 Functional Description
Power System Functional Description
for the version 1 power tray is on the back of the tray, as shown in Figure 2-57. The power switch for the
version 2 power tray is on the front of the tray, as shown in Figure 2-59.
Figure 2-59 Location of AC Power Switch - Version 2 Power System
AC Input Voltage Range
Each AC module accepts an individual single phase 220-VAC 20-A source. Table A-17 shows the limits
of the specified AC input voltage. The voltages given are single phase power source.
DC Output Levels
The output for each module is within the tolerance specifications (see Table A-19) under all
combinations of input voltage variation, load variation, and environmental conditions. The combined,
total module output power does not exceed 3000 W.
The AC tray output capacity depends on how many modules are populated. Maximum output current is
determined by multiplying the maximum module current times module quantity. For example, to
determine the maximum capacity with three power supply modules, multiply the current by three (x3).
AC System Operation
This section describes the normal sequence of events for system AC power up and power down.
Power Up
1. AC power is applied to the power tray by toggling the user’s AC circuit breakers to the ON position.
2. AC/DC power supplies are enabled by toggling the Power On/Off logic switch located in each of the
power trays to the ON position.
3. AC/DC modules in the power trays provide –54 VDC output within six seconds after the AC is
applied.
1 Power switch
1
331402