User guide

Hardware
24
890 USE 108 00 August 2001
The A984-120/130 PLCs
A984-120/130
Front Panel
These two models have identically designed front panels, with one Modbus
communications interface, an EEPROM auxiliary memory socket, two slide switches
for memory protection and communication parameter selection, four LED indicators,
and a terminal strip for 24 Vdc power.
The A984-120 (Compact Controller comes with 1 Modbus communication port,
2K state RAM, 1.5K words of user memory, 8Mhz CPU, and operating
temperature 0 ... 60 degrees C).
The A984-130 (Compact Controller comes with 1 Modbus communication port,
2K state RAM, 4.0K words of user memory, 8Mhz CPU, and operating
temperature 0 ... 60 degrees C).
This is the front panel.
Slide Switches Two slide switches are located on the front panel of the controller directly above
LEDs, a memory protect switch and a communication parameter switch.
Lithium Battery
EEPROM Socket
Memory Protect
Communication
Slide Switch
Parameter
mem
prot
def
mem
ready
run
24 Vdc
M
o
d
b
u
s
bat low
Modbus
Slide Switch
LEDS
A984-120/130 PLC