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Base Unit
Main base unit Extension base unit
W
ith three
I/O modules
W
ith five
I/O modules
W
ith eight
I/O modules
W
ith 12
I/O modules
Power supply
CPU
Q33B
Q35B
Q38B
Q312B
Q63B
Q68B
Q612B
Q65B
(Requiring a power
supply module)
(Not requiring a power
supply module)
Q52B
Q55B
(For two modules)
W
ith eight
I/O modules
Q38DB
Multiple CPU high speed main base unit
W
ith 12
I/O modules
Q312DB
Power supplyPower supplyPower supply
Power supply
Power supply
CPU
CPUCPU
CPU
CPU
Power supply
Power supplyPower supplyPower supply
• The main roles of the base unit are; fixing the power supply module,
CPU module, and I/O modules, supplying 5VDC power from the
power supply module to the CPU module and I/O modules, and
transmitting the control signals to each module.