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6. PRECAUTION FOR USING QA6ADP
6.1 Current Consumption of QA6ADP
Since 5VDC is supplied to the QA6ADP from the power supply module of the
main base unit, take the current consumption of the QA6ADP into consideration
when selecting the power supply module for the main base unit.
n: Quantity of QA6ADP in system*1
Current consumption
of I/O of A5 B
Current consumption
of QA6ADP n
Current consumption of CPU
and I/O of main base unit
Current consumption
of I/O of Q5 B
*1The quantity of the QA6ADP includes the QA6ADP when the A6B is used.
The following shows the concept of the current consumption of the power
supply module mounted on the main base unit.
I3
I2
I0
I1
I4
IA
IA
IA
Main base unit
First extension stage
Second extension stage
Third extension stage
Fourth extension stage
Extension base unit (QA6 B)
Extension base unit (A5 B)
Extension base unit (A5 B)
Extension base unit (A6 B)
Power
supply
module
Power
supply
module
Power
supply
module
Symbol Description
I Rated current of power supply module on the main base unit
I0
Current consumption of CPU and I/O modules mounted on the main base
unit
I1 to I4
Current consumption of I/O mounted on the extension base unit in first to
fourth stages
IA Current consumption of the QA6ADP
In case of the above system, use the QA6ADP when the current consumption of
the power supply module mounted on the main base unit meets the following
formula.
I I0 I2 I3 IA 3
[Calculating formula]