User manual

4 Conguration | Example calculation for the power supply
25Manual u-remote1432790000/08/12.2015
Calculation of current demand for the output current
The current consumption of each module and the current
demand of the connected actuators must be considered for
the output current. There is no difference in the calculation
of the main power supply and power refresh:
(I
OUT
+ (I
L
x g) module 1
+ (I
OUT
+ (I
L
x g) module 2
+ ∑(I
OUT
+ (I
L
x g)) n modules
= Cumulative current demand
I
OUT
module current consumption from the output current path
I
L
Current demand of the connected actuators
Example:
The values in the following table are used to calculate the
current demand of the example station (cumulative for each
module). The input current is:
Module1:
I=0.116 A + (0.008 A + 0.012 A) + (0.06 Ax1)= 0.196A
Module2:
I=0.196 A+ (0.008 A + 0.012 A) + (0.06 Ax1)= 0.276A
The values for the other modules are calculated accordingly.
The result shows that the accumulated value for up to 12
modules remains under 10 A, and therefore a power-feed
module need not be used for the input current path.
Results for the output current path:
Module 5:
I=0.015 A+(2A x 0.5)=1.015A
Modul6 6:
I=1.015 A+(0.015 A+(4A x 0.5)=3.03A
Module10:
I=6.175A +(0.015A +(4A x 0.5)=8.19A
Module11 (without power refresh):
I=8.19 A+(0.015 A+(4A x 0.5)=10.205A
Therefore the available 10 A would be exceeded. As a result,
a PF-O power-feed module must be positioned e 11th mod-
ule, which will supply anocalculation of current consumption
is repeated for each power-feed module. Unused current
values may not be included.
Module11 (as per PF-O):
I=(0.015 A+(4A x 0.5)=2.015A
Module 12 (as per PF-O):
I = 2.015A (0.015 A + (4A x 0.5) = 4.030A