AT&T 518-600-016 manual Determining Unit Load Requirements

Mounting surface

Basic carrier Expansion carrier

Connector

C a r d e x t e n d e r

Backboard

FIGURE 2-13 Mounting an expansion carrier.

DETERMINING UNIT LOAD REQUIREMENTS

Review the following paragraphs that discuss unit load requirements and module slot assignments before installing modules.

A unit load is a measure of power used to determine the eletrical load of the MERLIN II system. Due to variations in system size and complexity, unit load computations must be made to assure proper operation of the system under all conditions.

The Power Supply Module provides 45 unit loads to each carrier. A MERLIN II system with a basic and expansion carrier can support 90 unit loads. If the unit load requirement per carrier exceeds 45 unit loads, an Auxiliary Power Unit is needed. This device connects to the Power

Installing the Control Unit 2-57