____________________________________________________________________________________________________________
V2
AC500 Hardware
1-59 System
data
AC500 / Issued: 05.2007
If one assumes that all outputs are switched on and are operated with their maximum permitted load
currents (under compliance with the maximum permitted currents at the supply terminals), then the
following values are the result for the example shown above:
I
CPU
I
Cx
I
I/O-Bus
I
UPx
I
LOADx
CPU part
PM581-ETH 0.110
A
-
-
-
-
CM572-DP - 0.050
A -
-
-
CM575-DN - 0.050
A -
-
-
CM577-ETH - 0.085
A -
-
-
CM578-CN - 0.050
A -
-
-
I/O part
AI523
-
-
0.002 A
0.150 A
-
AO523
-
-
0.002 A
0.150 A
0.160 A
AX521
-
-
0.002 A
0.100 A
0.080 A
AX522
-
-
0.002 A
0.100 A
0.080 A
DC522
-
-
0.002 A
0.050 A
8.000 A *)
DC523
-
-
0.002 A
0.050 A
8.000 A *)
DC532
-
-
0.002 A
0.050 A
8.000 A *)
Sums
0.110 A
0.235 A
0.014 A
0.650 A
24.320 A
\
-----------------------------
V
------------------------------
/
\
---------------
V
----------------
/
I
CLUSTER
= 0.359 A
I
UP
= 24.970 A
\
----------------------------------------
V
---------------------------------------
/
I
Total
= 25.329 A
*) The maximum permitted total current over the supply terminals of the I/O Terminal Units is 8 A.
Dimensioning of the fuses
To be able to select the fuses for the station correctly, both the current consumption and the inrush
currents (melting integral for the series-connected fuse) must be taken into consideration.
Recommended fuse
Fuse
for
Sum of the
melting integrals
in A²s
I
Cluster
A
I
UPx
A
Type Value
F1
CPU cluster
1.000
0.359
quick
10 A
F2
Module DC522
0.005
8.050
quick
10 A
F3
Module DC523
0.008
8.050
quick
10 A
F4
Module DC532
0.007
8.050
quick
10 A
F5 Modules
AX521
+ AX522 +
AI523 + AO523
0.130
0.820
quick
10 A
