Power Consumption - Nortel Media Gateway 3500 Installation, Operation And Maintenance Manual

Installation, Operation, Maintenance Manual
2.3.2.1

Power Consumption

2.3.2.1.1
DC Input Power
The average power consumption for a full complement of boards is approximately 460
watts (4 A at 115 VAC, 2 A at 230 VAC and 9.5 A at 48 VDC).
Two Power Entry Modules (PEM), each containing two input terminals, are provided for DC
connections on the rear of the chassis. Power is required to be between -40.5 and -60
VDC. Each of the DC input terminal is reverse current protected. The pair of J1 input
terminals and the pair of J2 input terminals provide redundancy protection of the power
entry circuitry.
Recommendations for DC Power input:
When using DC power as the primary input, ensure that the power supply complies
with relevant safety standards eg. CAN/CSA-C22.2 No. 60950-1 and UL 60950-1, and
EN 60950-1.
For High Availability, connect two separate DC power sources to avoid total power
failure if one of the DC power sources fails.
2.3.2.1.2
AC Input Power
A standard, properly earthed, quick connect socket (IEC 60320 C20) and associated
filtering and circuit breaker are located on the rear panel. The appropriate power cable is
provided according to the customer's local standards. Power requirements are 100 to 240
V AC at a nominal 50/60 Hz line frequency.
For AC, only one PEM is to be installed in the system.
Recommendations for AC Power input:
It is recommended to connect the AC power source to a UPS to avoid total power
failure if the AC power source fails. This is mandatory for high availability (i.e., on
redundant system configurations).
Connect AC-powered systems only to earthed power outlets.
Connect the chassis to the facility's earth, using the earthing terminal(s) provided.
Version 3.0
WARNING
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2. Hardware Overview
October 2005