Example Calculation For The Current Demand (All Current Values In Amps) - Emerson PACSystems RSTi-EP User Manual

User Manual
GFK-2958J
subsequent modules after the power feed module. Unused current values may not be
included.
Module 11 (as per PF-O):
I = (0.015 A + (0.5 A x 4) = 2.015 A
Module 12 (as per PF-O):
I = 2.015 A (0.015 A + (0.5 A x 4) = 4.030 A
3.7 Example Calculation for the Current Demand
(all Current Values in Amps)
Module Part
I
SYS
no. number
EPXPNS00
0.116
1
1 EP-1214 0.008 0.018
2 EP-1214 0.008 0.018
3 EP-1214 0.008 0.018
4 EP-1214 0.008 0.018
5 EP-2218 0.008
6 EP-2218 0.008
7 EP-2218 0.008
8 EP-2218 0.008
9 EP-2218 0.008
10 EP-2218 0.008
EP-7641
11 EP-2218 0.008
12 EP-2218 0.008
I Current consumption from the system power supply
SYS
I
Power consumption from input current path
IN
I
OUT
Power consumption from output current path
I
S
Current demand of the connected sensors
I
L
Current demand of the connected actuators
The current demand is just under 10 A. The output current path must therefore be refreshed before the
11th module.
Configuration
Simultaneity
factor
I I I I
IN OUT S L
g
0.06 1.0
0.06 1.0
0.12 1.0
0.18 1.0
0.035 2.0 0.5
0.035 4.0 0.5
0.035 3.0 0.5
0.035 2.0 0.5
0.035 1.2 0.5
0.035 4.0 0.5
0.035 4.0 0.5
0.035 4.0 0.5
Cumulative
Cumulative
current
current
demand of the
demands of
output power
the input
path network
current path
adapter
0.116 0
0.202 0
0.288 0
0.434 0
0.640 0
0.648 1.035
0.656 3.070
0.664 4.605
0.672 5.640
0.680 6.275
0.688 8.290
0.696
0.700
Chapter 3
Oct 2019
Cumulative
current
demand of
the EP-7641
output power
path
2.035
4.070
28