DHT80 Option Installation Manual

This document contains installation, configuration, and testing procedures for the DHT80 Asynchronous Communications option on the DECsystem 5100. It covers:

• Installation: Step-by-step procedures to remove existing covers and drive shelves, add standoffs, connect the 100-way cable, install the DHT80 module, and reassemble the system.
• Testing: Instructions for verifying the system recognizes the option using the iooption environment setting and the conf -f command, followed by internal and external diagnostic testing.
• Support Information: A list of Field Replaceable Units (FRUs) and associated part numbers for cables, adapters, and labels.

This manual is intended for Digital service representatives or qualified self-maintenance personnel.