Polycom DOC2237A manual Power Supply Module, Power Module in the MGC-100

Chapter 4 - Hardware Description

Power Supply Module

Both MGC units (MGC-100 and MGC-50) operate at 100-240 volts

AC 50/60 Hz.

Power Module in the MGC-100

Up to three redundant power supplies (N+1) provide backup for the system to ensure multipoint service is not interrupted as a result of any single power supply failure. The Power Supply Modules are hot swappable and connect to the Powerplane, which is part of the Backplane.

The power supply automatically senses the AC input voltage.

One Power Supply Module is required to power a partially populated system.

Two Power Supply Modules are required to power a full system or a partially populated system with power supply redundancy.

Three Power Supply Modules are required to power a full system with power supply redundancy.

The capacity of each power supply module is shown in Table 4-1.

Table 4-1: MGC-100 Power supply modules capacity

Voltage (V)	Maximum current (Amp.)
5	90
12	5
-12	1

The MGC-100 can accommodate a -48 volt DC power supply. The mechanical design does not allow 48V power supply modules to be inserted into a system designed for AC input, or AC power supply modules to be inserted into a system designed for 48V DC input.

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