Mitsubishi Electric Q26UD(E)HCPU User Manual page 678

(7) Example of calculation of average power consumption
(a) System configuration
(b) 5VDC/24VDC current consumption of each module
Q02HCPU
QX40
QY40P
QJ71LP-25
Q62DA
Q35B
(c) Power consumption of power supply module
W = 3/7 × (0.64 + 0.05 + 0.05 + 0.065 + 0.55 + 0.33 + 0.11) × 5 = 3.85 (W)
PW
(d) Total power consumption for 5VDC logic circuits of all module
W = (0.64 + 0.05 + 0.05 + 0.065 + 0.55+ 0.33 + 0.11) × 5 = 8.98(W)
5V
(e) Total of 24VDC average power consumption of the output module
W = 0.01 × 24 × 1 = 0.24 (W)
24V
(f) Average power consumption due to voltage drop in the output section of the output
module
W = 0.1 × 0.2 × 16 × 1 = 0.32 (W)
OUT
(g) Average power consumption of the input section of the input module
W = 0.004 × 24 × 32 × 1 = 3.07 (W)
IN
(h) Power consumption of the external power supply section of the intelligent function
module
W = 0.12 × 24 = 2.88 (W)
S
(i) Power consumption of overall system
W = 3.85 + 8.98 + 0.24 + 0.32 + 3.07 + 2.88 = 19.34 (W)
The value of the heat generated in a redundant system (when the Redundant CPU is used) is the sum of the two values for
the control and standby systems, each of which is calculated by the same method as that for the single system.
676
Q61P-A1
Q02HCPU
QX40
Module model name
Q35B
Q62DA
QY40P QJ71LP21-25
5VDC
0.64A
0.05A
0.065A
0.55A
0.33A
0.11A
24VDC
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0.01A
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0.12A
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