User guide

Hardware
890 USE 108 00 August 2001 27
The A984-131/141 & E984-241/251 PLCs
A984-131/141
and E984-241/
251 PLCs Panels
These four models have identically designed front panels, with two Modbus
communications interfaces, an EEPROM auxiliary memory socket, two slide
switches for memory protection and communication parameter selection, five LED
indicators, and a terminal strip for 24 Vdc power.
The A984-131 (Compact Controller comes with 2 Modbus communication ports,
4.0K words of user memory, 2K state RAM, 8Mhz CPU, and operating
temperature 0 ... 60 degrees C).
The A984-141 (Compact Controller comes with 2 Modbus communication ports,
8.0K words of user memory, 2K state RAM, 8Mhz CPU, and operating
temperature 0 ... 60 degrees C).
The E984-241 (Compact Controller comes with 2 Modbus communication ports,
FLASH RAM based system executive, 8.0K words of user memory, 2K state
RAM, 16Mhz CPU, and operating temperature 0 ... 60 degrees C).
The E984-251 (Compact Controller comes with 2 Modbus communication ports,
FLASH RAM based system executive, 16.0K words of user memory, 24K of
(6xxxx) extended data register storage, 2K state RAM, 16Mhz CPU, and
operating temperature 0 ... 60 degrees C).