User guide

Hardware
890 USE 108 00 August 2001 31
A984-145, E984-245/255 Controllers
A984-145, E984-
245/255 Front
Panel
These models have identically designed front panels, with two 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 A984-145 (Compact Controller comes with 1 Modbus communication port, 1
Modbus Plus port, 8.0K words of user memory, 2K state RAM, 8Mhz CPU, and
operating temperature 0 ... 60 degrees C).
The E984-245 (Compact Controller comes with 1 Modbus communication port, 1
Modbus Plus port, FLASH RAM based system executive, 8.0K words of user
memory, 2K state RAM, 16Mhz CPU, and operating temperature 0 ... 60 degrees
C).
The E984-255 (Compact Controller comes with 1 Modbus communication port, 1
Modbus Plus port, 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).
This is the front panel.
Lithium Battery
Modbus Plus
Addressing
DIP Switch
EEPROM Socket
Memory Protect
Communication
Slide Switch
Parameter Slide
24 Vdc
mem
prot
def
mem
run
M
o
d
b
u
s
ready
Modbus
M
B
P
l
u
s
A984-145 & E984-245/255 PLCs
LEDs
bat low
MB Plus
Switch