HP 24SII - Manual (Page 136)

C.5 MODEL 24SII I/O MODULE EPROM
UPGRADE
The materials you will receive with your upgrade kit are:
EPROM(s) (chip(s) with label). Chips will be marked to identify which
module type they install into. The upgrade requires one new
EPROM per I/O module. You will receive the correct quantity of
EPROMs for the number of I/O modules installed that need to be
upgraded. Please refer to the following table to determine which
EPROM each module type requires
BayTech Part Number Module Type EPROM Label Marking
M24SII-V02 4 Port high speed
parallel, DB-25F M24SII
DES-4AHS
M24SII-V03 4 Port high speed serial
EIA-232, DB-25M, DTE M24SII
DES-4CHS
M24SII-V06A 4 Port high speed serial
EIA-232, RJ-45 M24SII
DES-4CHS
M24SII-V07 4 Port high speed serial
EIA-422, RJ-45 M24SII
DES-4CHS
M24SII-V08 4 Port high speed serial
current loop, DB-25M M24SII
DES-4CHS
The materials you will need to supply are:
Straight-slot screwdriver
IC DIP extractor or a pair of curved needle-nose pliers
1. IMPORTANT: Remove power from the unit by depressing the
power switch on the front of the unit to OFF. Also remove power
cord from the AC outlet.