Ac Rectifier - Cisco CRS-1 System Description

AC Power System

AC Rectifier

The AC rectifier is an AC power supply that converts input AC power into the DC power necessary to
power chassis components. The rectifier takes input AC power, rectifies the AC into DC, provides
filtering and control circuitry, provides status signaling, and passes the DC power to either the A or B
bus in the chassis midplane. Each AC rectifier has two self-contained cooling fans that draws air through
the module.
Figure 2-2
The AC rectifier module physical dimensions are:
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AC power enters the AC rectifier at the rear of the power shelf. When the power enters the AC rectifier,
internal circuits rectify the AC into DC, filter, and regulate it. The DC-to-DC process converts the 350-
VDC primary side power to –54-VDC isolated secondary power.
A service processor (SP) module in each AC rectifier monitors the status of each AC rectifier. The
service processor communicates with the system controller on the route processor (RP). The service
processor circuitry monitors the AC rectifier fault and alarm conditions.
Each AC rectifier contains an ID EEPROM that stores information used by control software (for
example, part number, serial number, assembly deviation, special configurations, test history, and field
traceability data).
Cisco CRS Carrier Routing System 4-Slot Line Card Chassis System Description
2-4
AC Rectifier
Height—1.6 in. (4.0 cm)
Width—4 in. (10.1 cm)
Depth—13.8 in. (35.1 cm)
Weight—4.6 lb. (2.0 kg)
Chapter 2 Chassis Power System
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