User's Manual

56 Engineering and configuration guidelines
AC power architecture ^
The internal AC power system consists of the following main elements:
- Pedestal Power Distribution Unit (PDU)
- Module Power Distribution Unit (MPDU)
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- AC Power Supplies
No arbitrary selection of these components is required - they are included
automatically in the System functional determination process.
There are three different AC power supplies that provide power to all of the
common equipment, peripheral equipment, and combined common/peripheral
equipment modules, as well as a ringing generator that provides AC ringing
(and message waiting lamp voltages) when required for the peripheral
equipment modules.
No additional external power components are required for AC-powered ‘.
systems. Reserve power, if needed, is accomplished through the use of an
external Uninterruptible Power Supply (UPS).
Internal AC power equipment components
The following components are required to configure and AC powered system.
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Common Equipment Power Supply AC (NT8D29AA)
The Common Equipment Power Supply AC is used in the Common
Equipment modules in AC systems. It is located in the first slot on the left in
the module labeled “CE Pwr Sup,“ and converts 208/240 V ac to +5 V and
f12 V dc, to provide all required voltages for CE and network circuit cards.
Configuration guidelines One Common Equipment Power Supply AC is
used in each of the following AC modules:
- CPU Module (NT8D34AA)
- Network Module (NT8D35AA)
- CPU/Network Module (NT6D39AA)
Power engineering 553-3001-152
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