Mitsubishi Q2ACPU User Manual page 264

16. POWER SUPPLY MODULE
(1)
(2)
(3)
Selecting a power supply module when using extension base unit(s), A52B, A55B,
and/or A58B
When an extension base unit, A52B, A55B, or A58B is used, 5VDC power supply is
supplied from the power supply module on the main base unit via an extension cable.
Thus, when one of these units is used, pay attantion to the following:
(a) When mounting a power supply module on the main base unit, select a model
that can cover 5VDC current consumed by modules mounted on the A52B,
A55B, and/or A58B.
Example
If 5VDC current consumptions on the main base unit and on the A55B are 5A
and 2A respectively,the power supply module to be installed to the main base
unit is the A61P (5VDC, 8A).
(b) Since power to the A52B, A55B, or A58B is supplied via an extension cable, a
voltage drop occurs through the cable. It is necessary to select a power supply
module and cables with proper length so that 4.75VDC or more is available on
the receiving end.
For details of voltage drop, refer to Section 17.3 Application Standards of
Extension Base Units.
Handling precautions for the A66P
(a) Use the A66P on the base unit where no module, a dummy module or a blank
cover is installed to the rightmost slot or the right adjacent slot.
(b) The A66P output current (24VDC) depends on the left-hand adjacent module as
shown below.
Precautions for power capacity of power supply
For power supply to the power supply module, select a power supply having enough
power capacity. (As a standard, power capacity more than twice of the specification is
recommended.)
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