X20 system modules • Digital output modules • X20DO8331
X20 system User's Manual 3.10
1265
4.15.25.9 Operation with 2 A
The outputs of the module can handle up to 2 A. With a total current of 8 A, no more than 4 channels are operable
at full load. To ensure optimal use of the module, it is important to assign the channels properly, and to keep in
mind a potential derating.
Correct channel assignment is important, since the eight outputs are divided between two output drivers. The
channels operated with 2A must therefore be evenly divided between both output drivers.
Output driver 1:
Channels 1 - 4
Output driver 2:
Channels 5 - 8
The following table provides an overview of the number of fully used channels, the resulting best distribution, and
a potential derating.
Number of channels using 2A
Division
Derating
1
Any
No
2
1st channel with 2 A ... channel no. 1 - 4
2nd channel with 2 A ... channel no. 5 - 8
No
3
Assign all even or all odd channel numbers. Exam-
ples:
1, 3, 5
2, 4, 6
3, 5, 7
4, 6, 8
Channels 1 and 3
Channels 2 and 4
Channels 5 and 7
Channels 6 and 8
4
Assign all even or all odd channel numbers. Possible
distributions:
1, 3, 5, 7
2, 4, 6, 8
All channels
All channels
Derating when 3 or 4 channels are operated with 2 A:
O
ut
pu
t c
ur
re
nt
[A
]
Ambient temperature [°C]
-25
0
1.375
2
35
60
Figure 391: Derating when 3 or 4 channels are operated with 2 A
Information:
Modules next to this module can have a maximum power consumption of 1.5 W.
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