Meridian America 21 Manuale Utente

Apply the following rules for system engineering when arranging various
Universal Equipment Modules 

 within an SL- 1.

This document has been updated to include new naming

conventions. Acronyms and abbreviations for the new names are

identified in the text using parentheses.

Columns of Universal Equipment Modules 

 are numbered from 0 to

63. The column 

 CPU 0 is Column 0. Within a column, the 

 are

numbered as 0 to 3 starting from the bottom UEM.

A UEM column can be built up to a maximum of four 

 before moving

to the next column; however, three 

 per column can be configured if

it is easier for installation and maintenance.

All the SL-1 Common Equipment (CPU 

 must be at the bottom or

one level up for proper cooling and reliability. The mass storage unit--
Multi-Disk Unit 

 or Floppy Disk Unit 

 usually located in a

CPU UEM and requires lower operating temperatures than the cards. For
this reason, do not install 

 in the third or fourth UEM.

The Common Equipment (CE) 

 must be located next to each other at

the same horizontal level. The CPU/Network Modules 

(CNE) must be located on top of each other.

The CPU, 

 and CE 

 must be located in the same vertical

column. For these 

 all inter-UEM cabling must be internal, not

System engineering 553-3001-l 51