Meridian America 21 Manual De Usuario

4 Description

The Dgtl LC contains an 8050 microprocessor that provides 

 following

functions:

card self-identification

self-test

control card operation

status report to the controller

diagnostics for maintenance purposes

Up to 16 

 LC circuit packs can be mounted in one PE shelf if the

remaining slots are not used. In addition, up to 16 Dgtl LC packs can be

supported by a single 

 Peripheral Equipment Power Supply 

Pwr Sup). The PE Pwr Sup is available for both ac and dc power.

The Dgtl LC needs 

 dc over each loop at a maximum current of 80

 The line feed interface can supply power to one loop of varying length

up to 1067 m (3500 ft) using 24 AWG gauge wire with a maximum
allowable ac signal loss of 15.5 

 at 256 KHz, and a maximum dc loop

- -

resistance of 210 ohms.; 26 AWG gauge wire is limited to 745 m (2450 ft).

For a detailed description of the exact power requirements of each set type,
refer 

(553-2201-l 16)

Digital line card description 553-3001-l 62