Mitsubishi Electric Q172DCPU - Page 108

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3 DESIGN
(7) Example of average power consumption calculation
(Q173DCPU use)
(a) System configuration
Q61P Q03UD
CPU
Q173D
CPU
QX40 QX40 Q172D
LX
Q172D
EX
Q173D
PX
QY10
QY10
Q38DB
(b) 5 VDC current consumption of each module
Q03UDCPU
(Note)
: 0.33 [A]
Q173DCPU : 1.25 [A]
QX40
(Note)
: 0.05 [A]
Q172DLX : 0.06 [A]
Q172DEX : 0.19 [A]
Q173DPX : 0.38 [A]
QY10
(Note)
: 0.43 [A]
Q38DB
(Note)
: 0.228 [A]
(Note) : 5VDC internal current consumption of shared
equipments with PLC might be changed.
Be sure to refer to the PLC Manuals.
(c) Power consumption of power module
W
PW = 3/7 (0.33 + 1.25 + 0.05 + 0.05 + 0.06 + 0.19 + 0.38 + 0.43 + 0.43 +
0.228)
5 = 7.28 [W]
(d) Power consumption of a total of 5 VDC logic section of each module
W
5V = (0.33 + 1.25 + 0.05 + 0.05 + 0.06 + 0.19 + 0.38 + 0.43 + 0.43 +
0.228)
5) = 16.99 [W]
(e) A total of 24 VDC average power consumption of the output module
W
24V = 0 [W]
(f) Average power consumption due to voltage drop in the output section of the
output module
W
OUT = 0 [W]
(g) Average power consumption of the input section of the input module
W
IN = 0.004 24 32 1 = 3.07 [W]
(h) Power consumption of the power supply section of the intelligent function
module.
W
S = 0 [W]
(i) Power consumption of overall system
W = 7.28 + 16.99 + 0 + 0 + 3.07 + 0 = 27.34 [W]