Mitsubishi Electric MELSEC L Series User Manual page 154

The calculation formulas for the power consumption of each block are as follows.
(1) Power consumption of power supply module
The power conversion efficiency of the power supply module is approximately 70% and 30% of the output power
is consumed as heat. As a result, 3/7 of the output power will be the power consumption.
The calculation formula is as follows.
W
PW
I : Current consumption of the 5VDC circuit of each module
5V
I : Average current consumption of the 24VDC power supply for internal consumption of the output modules
24V
(power consumption for the output points simultaneously turned on)
*1
(2) Power consumption of the 5VDC logic circuit sections in all modules
(including the head module)
The power consumption of the 5VDC output circuit in the power supply module is the power consumption of each
module.
W
5V
(3) Total of 24VDC average power consumption of the output modules (power
consumption for the output points simultaneously turned on)
The average power of the 24VDC external power supply is the total power consumption of each module.
W
24V
(4) Voltage drop in the output section of the output module (power consumption
for the output points simultaneously turned on)
W
OUT
I
OUT
V
drop
(5) Average power consumption of input section in the input module (power
consumption for the input points simultaneously turned on)
W
IN
I : Input current (effective value for AC) (A)
IN
E: Input voltage (voltage in actual use) (V)
(6) Power consumption of the external power supply section to the load(s)
connected to the intelligent function module
W = I
S
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3
(I v 5) + (I
=
5 24
7
Not applicable for the power supply module which does not have the 24VDC power output. (Power (24VDC) is externally
supplied.)
 5 (W)
= I
5V
 24  Simultaneous on rate (W)
= I
24V
 V  Number of output points  Simultaneous on rate (W)
= I
OUT drop
: Output current (current in actual use) (A)
: Voltage drop of each output module (V)
 E  Number of input points  Simultaneous on rate (W)
= I
IN
 24 (W)
24V
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v 24) (W)
*1