Mitsubishi FX3UC Series, Руководство пользователя

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265
FX
3UC
Series Programmable Controllers
User’s Manual - Hardware Edition
9 CC-Link/LT Built-in master ability (Only FX3UC-32MT-LT)
9.6 Selection of the power supply for CC-Link/LT
1
O
utline
2
Exter
nal
D
im
en
sions
3
Ge
ne
ric
Speci
ficat
ions
4
Pow
er Suppl
y
Specif
icati
ons
5
Input Spec
ific
ations
6
O
utput
Specif
icat
ions
7
Exam
pl
es
of
W
iri
ng
fo
r
Va
rious U
ses
8
Te
rm
inal B
lock
9
CC
-L
in
k/L
T
Ma
ste
r F
X
3UC
(LT
only)
10
D
ispl
ay m
odule
FX
3UC
(L
T only)
2. Selection based on the calculation formula (at supply voltage: 24V DC, ambient
temperature: 20
°
C)
1) When a dedicated flat cable is used
calculation formula
*1. Some remote I/O stations for CC-Link/LT supply power for I/O via a CC-Link/LT dedicated flat cable.
→
For details, refer to the manual of each remote I/O station.
When the current consumption is determined, the distance from the main unit to the furthest station can be
obtained from the following formula.
Or when the distance from the main unit to the furthest station is determined, the allowable current
consumption can be obtained from the formula below.
The simplified graph and the calculation formula for voltage drop may not always be accurate as effects such
as ambient temperature and the number of connectors used can influence the results.
When the voltage drops considerably, add a power supply adapter or dedicated power supply.
And if the driving voltage (20.4 V) cannot be assured in a remote station, take proper countermeasures.
2) When a dedicated flat cable, VCTF cable and high flexible cable are used together
calculation formula
Voltage drop
(V)
Maximum
distance (m)
+ 55(Constant)
0.06 (Constant)
=
≤
3.6V
Total current
consumption
(A)
Maximum
distance
Total current
consumption
Distance from main unit to farthest remote I/O station that receives power from built-in power
supply
Total current consumption of
each CC-Link/LT station that
receives power from main unit
+
Total current consumption of I/O equipment (such as
sensor) connected to remote I/O stations that receives
power from the main unit (through communication
cable)
*1
1.1V
(Constant)
× ×
+
Maximum
distance (m)
≤ ÷
3.6 (V) - 1.1 (V)
(Constant)
Total current
consumption
(A)
0.06 (Constant)
−
55 (Constant)
÷
≤
÷ ÷
Total current
consumption
(A)
0.06 (Constant)
Maximum
distance (m)
+ 55 (Constant)
3.6 (V) - 1.1 (V)
(Constant)
General-
purpose power
supply voltage
−
20.4V
Voltage drop
≥
Voltage drop
(V)
Maximum
distance (m)
+ 45(Constant)
0.08 (Constant)
=
≤
3.6V
Total current
consumption
(A)
1.1V
(Constant)
× ×
+