Mitsubishi Electric Melsec-Q172DCPU User Manual page 86

2 SYSTEM CONFIGURATION
(3) Selection of the power supply module
The power supply module is selected according to the total of current
consumption of the modules, and peripheral devices supplied by its power
module.
5VDC internal current consumption of shared equipment with PLC might be
changed. Be sure to refer to the MELSEC-Q series PLC Manuals.
(a) Calculation example of power supply selection
<System configuration (Q173DSCPU use)>
Q61P Q03UD Q173DS
CPU
• 5VDC current consumption of each module
Q03UDCPU
Q173DSCPU
Incremental synchronous encoder : 0.20 [A]
QX40
Q172DLX
Q172DEX
• Power consumption of overall modules
I = 0.33 + 1.75 + 0.20 + 0.05
5V
2 + 0.43
Select of the power supply module (Q61P (100/240VAC) 6A) according to
this internal current consumption 4.47[A].
POINT
Configure the system in such a way that the total current consumption at 5VDC of
all the modules is the allowable value or less.
(4) Life detection power supply module
The Life detection power supply module (Q61P-D) estimates its remaining life
internally and displays the service life.
The remaining life of the module can be checked with the LIFE LED located on
the front of the module and ON/OFF of the LIFE OUT terminals.
Refer to "QCPU User's Manual (Hardware Design, Maintenance and Repair)" for
details of the life detection power supply module.
QX40 QX40 Q172DLX Q172DEX
CPU
Incremental synchronous encoder
2 + 0.23 = 4.47[A]
2 - 53
Q173DPX QY10
MR-HDP01
MR-HDP01
Q171ENC-W8
: 0.33 [A] Q171ENC-W8 : 0.25 [A]
: 1.75 [A] Q173DPX
MR-HDP01
: 0.05 [A] QY10
: 0.06 [A] Q38DB
: 0.19 [A]
2 + 0.06 + 0.19 + 0.25 + 0.38 + 0.06
Q38DB
QY10
: 0.38 [A]
: 0.06 [A]
: 0.43 [A]
: 0.23 [A]