Installation User Manual

Guidelines for
Adding/Removing
Memory
Available RAM Memory
Publication 6155-IN001C-EN-P
Chapter 4
Installing/Removing Memory
Modules
This chapter describes how to add RAM Memory to the 6155 Computer
processor board. Topics include:
• Available RAM memory
• Guidelines for adding/removing memory modules
• How to add/remove memory modules to processor board
The 6155 Computer has three 168-pin sockets supporting a single or
double-sided Dual In-Line Memory Module (DIMM):
Memory Module Catalog Number
64MB SDRAM DIMM 6189-DIMM64
128MB SDRAM DIMM 6189-DIMM128
256MB SDRAM DIMM 6189-1DIMM256
Note: If you use any type of memory module other than a
qualified Allen-Bradley part, you may encounter problems.
When adding memory to the 6155 Computer, follow these guidelines:
• Use only a standard, unbuffered 168-pin DIMM that conforms to
both PC-100 and Serial Presence Detect (SPD) compliance industry
standards.
• Use only Synchronous Dynamic Random Access Memory
(SDRAM) type DIMMs.
• BIOS automatically detects memory size and type (i.e., SDRAM vs.
EDO). It does not detect parity, however, so this must be manually
configured by the end-user in BIOS Setup. The 6155 Computer
ships with ECC-type memory, and the Memory Parity Check feature
in BIOS Setup is programmed to "ECC" by default.
• If a non-ECC DIMM is installed, the Memory Parity Check in BIOS
Setup must be changed/saved to "Disabled". The system will fail to
boot if ECC is enabled in Setup with a non-ECC DIMM installed.
• Use only gold-plated lead DIMMs.
Chapter Objective