Mitsubishi Q01CPU User Manual page 253

10
LOADING AND INSTALLATION
(7) Example of calculation of average power consumption
(a) System configuration
Q61P-A1
Q02HCPU
QX40
QY40P
(b) 5VDC/24VDC current consumption of each module
Table10.2 5VDC/24VDC current consumption
module name
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 5 VDC 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 24 VDC average power consumption of the output module
W = 1.60 24 = 38.40(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 + 38.40 + 0.32 + 3.07 + 2.88 = 57.50(W)
POINT
The value of the heat generated in a redundant system configuration (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.
10.2 Calculating Heat Generation of Programmable Controller
Q35B
Q62DA
QJ71LP21-25
Diagram 10.5 System configuration
5VDC
0.64A
0.05A
0.065A
0.55A
0.33A
0.11A
9
10
11
24VDC
----
----
1.60A
12
----
0.12A
----
10
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