Instruction manual

3 - 14
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) 5VDC 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]
(Note) : 5VDC internal current consumption of shared
equipments with PLC might be changed.
Be sure to refer to the MELSEC-Q series PLC
Manuals.
QY10
(Note)
: 0.43 [A]
Q38DB
(Note)
: 0.23 [A]
(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 +
0.23)
5 = 7.29 [W]
(d) Total power consumption for 5VDC logic circuits of all modules
W
5V = (0.33 + 1.25 + 0.05 + 0.05 + 0.06 + 0.19 + 0.38 + 0.43 + 0.43 +
0.23)
5 = 17 [W]
(e) A total of 24VDC 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 = 7.29 + 17 + 0 + 0 + 3.07 + 0 = 27.36 [W]