User guide

890 USE 108 00 August 2001 11
1
Compact Hardware
At a Glance
Introduction The information in this chapter introduces the Compact Controller and describes
the common architecture shared by the 984 Controllers. If the Compact Controller
is new to you, please refer to Getting Started, p. 145).
What’s in this
Chapter?
This chapter contains the following topics:
Topic Page
The 984 Family of PLCs 12
Special Features of the Compacts 14
The A984-120/130 PLCs 24
The A984-131/141 & E984-241/251 PLCs 27
A984-145, E984-245/255 Controllers 31
The E984-258 Controller 33
E984-265/275/285 Controllers 36
EEPROM Auxiliary Memory Capability (A984-1xx/E984-24x/251/255 Only) 39
Editing Logic Loaded from EEPROM Card (A984-1xx, E984-24x/251/255 Only) 42
Program Storage using FLASH RAM & PCMCIA (E984-258/265/275/285 Only) 44