APPX
Appendix 9 Calculating Heating Value of Programmable Controller
195
A
Calculation examples for the average power consumption
System configuration
■ 5VDC/24VDC current consumption of each module
Power consumption of each block
■ Power consumption of power supply module
W
PW
= 3/7 (0.69 + 0.04 + 0.04 + 0.052 + 0.6 + 0.272 + 0.22) 5 = 4.10(W)
■ Total power consumption for 5VDC logic circuits of all module
W
5V
= (0.69 + 0.04 + 0.04 + 0.052 + 0.6 + 0.272 + 0.22) 5 = 9.57(W)
■ Total of the 24VDC average power consumption of the output module
W
24V
= 0.01 24 1 = 0.24(W)
■ Average power consumption when the voltage drop of the output module occurs
W
OUT
= 0.1 0.2 16 1 = 0.32(W)
■ Average power consumption at the input section of the input module
W
IN
= 0.004 24 32 1 = 3.07(W)
■ Power consumption of the external power supply used for each module
W
S
= 0.192 24 = 4.61(W)
Power consumption of the overall system
W = 4.10 + 9.57 + 0.24 + 0.32 + 3.07 + 4.61 = 21.91(W)
No. Module or unit 5VDC 24VDC
(1) Power supply module
(2) CPU module 0.69A
(3) Input module 0.04A
(4) Output module 0.052A 0.01A
(5) Network module 0.6A
(6) Intelligent function module 0.272A 0.192A
(7) Base unit 0.22A
(7)
(1) (2) (3) (4) (5) (6)
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