Mitsubishi FX3UC SERIES User Manual page 269

FX Series Programmable Controllers
3UC
User's Manual - Hardware Edition
2. Rule when using power adapter or dedicated power supplies
When the capacity of the built-in power supply is insufficient, use the power supply adapter or dedicated
power supply in accordance with the system configuration. (The power supply adapter and dedicated power
supply can be used together.)
When using the power supply adapter or dedicated power supply, calculate "current consumption", "voltage
drop" and "minimum operating voltage (20.4V DC)" for each power supply adapter, and satisfy each condition
in the system configuration.
→ For the power supply adapter and dedicated power supply, refer to the manual of the
System configuration examples
FX -32MT-
3UC
LT
(Built-in
master+Built-in
power supply
(350mA)
Terminal
resistor
Power is supplied from Dedicated
Remote I/O
station a)
Remote I/O
station b)
1) Current consumption calculation
Current consumption calculation in built-in power supply
(1st module)
Current consumption calculation in power adapter or
dedicated power supply (2nd module)
2) Start-up current calculation
Start-up current calculation supplied from built-in power
supply (1st module)
Start-up current calculation supplied from power adapter
or dedicated power supply (2nd module)
3) Voltage drop calculation
Voltage drop calculation supplied from built-
in power supply (1st module)
Voltage drop calculation supplied from
power adapter or dedicated power supply
(2nd module)
4) Confirmation related to the minimum operating voltage (20.4V DC) of the module
Minimum operating voltage (20.4V DC)
from power adapter (1st module)
Minimum operating voltage (20.4V DC)
from power adapter (2nd module)
*1. When using remote I/O stations that receive power for connected I/O equipment from the built-in
power supply, power supply adapter or dedicated power supply, include the current consumption of
the connected I/O equipment.
power supply (1st module)
Remote I/O
station c)
Remote I/O
station d)
9 CC-Link/LT Built-in master ability (Only FX3UC-32MT-LT)
9.6 Selection of the power supply for CC-Link/LT
LINK connector LINK/POWER connector
Power adapter or
Dedicated power
supply
Power is
supplied.
Power is supplied from Dedicated power
supply (2nd module)
Remote I/O
station e)
Remote I/O
station f)
Total current consumption in master station and
=
remote I/O station a) to d)
Total current consumption in remote I/O station
=
*1
e) to h)
Total current of remote I/O station a) to d) at
=
*1
start-up
Total current of remote I/O station e) to h) at
=
start-up *1
Calculate voltage drop in remote I/O station a) to d) based on
=
current consumption and distance to the furthest station.
Calculate voltage drop in remote I/O station e) to h) based on
=
current consumption and distance to the furthest station.
Output voltage of built-in power supply (1st module)
=
- voltage drop ≥ 20.4V
Output voltage of power adapter or dedicated power supply
=
(2nd module) - voltage drop ≥ 20.4V
corresponding product.
General-purpose
power supply
*1. Used when dedicated power
supply is not required
Terminal
resistor
Remote I/O
station g)
Remote I/O
station h)
*1
1
2
3
*1
4
5
6
7
8
9
10
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