Communication Server Large System Installation and Commissioning

Installing DC power Page 117 of 456

Communication Server 1000M and Meridian 1 Large System Installation and Commissioning

Four-Feed PDU

The Four-Feed PDU (NT4N49AA) supports independent power feeds to each

of four modules in a stack if required. However, in a typical installation where

independent power feeds are not required, two jumper wires are provided to

jumper adjacent battery leads. When the jumper wires are used, the four-wire

PDU effectively provides the same “shared” power configuration provided

by the existing DC PDU. Therefore, the new PDU is backward compatible

and can replace an existing PDU unit in a stack, if required.

Figure 40

Standard two-feed wiring

The NT4N49AA DC PDU:

• supports four input circuits, implemented through the following terminal

configuration: four (negative) battery leads, four return leads, and logic

return lead

• is fully backward compatible with the existing PDU it is replacing

• supports independent power feeds to each of four modules

Cable-tie saddle

Cable restraint bar

553-AAA0467