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DEFINITY Enterprise Communications Server Release 5
Maintenance and Test for R5vs/si
555-230-123
Issue 1
April 1997
Maintenance Object Repair Procedures
Page 10-262CARR-POW (Carrier Port Power Unit) for AC-Powered Systems
10
CARR-POW (Carrier Port Power Unit)
for AC-Powered Systems
DEFINITY Generic 1 offers two basic cabinet type configurations: (1) the
multicarrier cabinet system and (2) the single-carrier cabinet system. Both
cabinet system configurations may be powered by either an external AC or DC
power source.
NOTE:
For environment maintenance, the aspects of a PPN configuration for a
High or Critical Reliability system or of an EPN cabinet configuration are
irrelevant.
The environment maintenance strategy to be used depends on both the cabinet
configuration and the type of powering. Therefore, refer to the following list to find
the appropriate MO section(s).
■ For a single-carrier cabinet system, refer to the "DC-POWER" Maintenance
documentation for environment maintenance strategy.
■ For a multicarrier cabinet system using an external AC power source, refer
to one or more of the following Maintenance documentation sections:
"AC-POWER", "CUST-ALM (Customer-Provided Alarming Device)", or
"POWER (Battery & Battery Charger) for AC-Powered Systems".
■ For a multicarrier cabinet system using an external DC power source, refer
to one or more of the following Maintenance documentation sections:
"AC-POWER (AC Power) for DC-Powered Systems", "CUST-ALM
(Customer-Provided Alarming Device)", or "POWER (Battery & Battery
Charger) for DC-Powered Systems".
Every carrier in the system must be supplied with +5 volt, -48 volt, and -5 volt DC
power for the various circuit packs to operate properly. This power is supplied to
the carriers as follows: AC from a wall outlet comes into the PDU, which
distributes the power via a set of fuses (F1 to F7) to the power units. Each carrier
in the system is equipped with two power units: the 631 DA AC power unit and
the 631 DB AC power unit, which together supply the required voltages to the
carrier. Figure 10-12 illustrates the position of the power unit and the power
distribution unit (PDU) and shows which power unit each fuse controls (Figure
10-12 also shows other Environment maintenance-related items that can be
1. Recycle the carrier indicated by the PORT field in the Alarm Log.
MO Name As
It Appears in
Alarm Log
Alarm
Level
Initial System
Technician
Command to Run
1
Full Name of MO
CARR-POW MAJOR recycle carrier PC Carrier Port Power Unit