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2 SYSTEM CONFIGURATION
(12) Selection of the modules used in the extension base unit
The modules used in the extension base unit are selected according to the total
of current consumption of the modules, and peripheral devices (Manual pulse
generator, Incremental synchronous encoder, etc.) supplied by the Motion
controller and Motion controller internal power supply.
5VDC internal current consumption of shared equipments with PLC might be
changed. Be sure to refer to the MELSEC-Q series PLC Manuals.
(a) Calculation example of module selection
<System configuration>
QJ71
LP21-25
Q170MS
CPU
Q55B
MR-HDP01
MR-HDP01
QX40 QY40P Q62DANQ173D
PX
Incremental synchronous encoder
• 5VDC current consumption of each module
Q170MSCPU : 2.50 [A] QY40P : 0.065 [A]
Incremental synchronous encoder: 0.20 [A] QJ71LP21-25 : 0.55 [A]
QX40 : 0.05 [A] Q62DAN : 0.33 [A]
Q173DPX : 0.38 [A] Q55B : 0.10 [A]
MR-HDP01 : 0.06 [A]
• Power consumption of overall modules
I
5V = 2.50 + 0.20 + 0.05 + 0.38 + 0.06
2 + 0.065 + 0.55 + 0.33 + 0.10
= 4.295 [A]
System configuration is possible because of the total of current
consumption 4.295 [A] is the allowable value 4.5 [A] or less.
POINT
Configure the system in such a way that the total current consumption at 5VDC of
all the modules is the allowable value 4.5 [A] or less.
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