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UPSI-1208DPx
F4 Dimensioning the upstream power supply
Ensure that the upstream power supply is correctly dimensioned to guarantee the charging process of the bat-
teries and the correct functioning of the application. The input has to be supplied from a SELV or PELV power
supply. In order to operate the UPS device with complete functionality, no constant current function should
be used and the upstream power supply should be able to provide at least the following values:
- UPSI-1208DP2 and DP3: 12 V / 9...10 A (~110...120 W)
- with Powerboost function: 24 V / 10.25...10.5 A (~123...126 W)
If less load than the maximum load is required at the output, the voltage supply can be dimensioned according
to the table below (column 3).
UPSI-1208DP2 / -DP3
I
[A]
LOAD
0
1
2
3
4
5
6
7
8
Revision 2-0
I
[A]
I
CHARGE
IN-MIN
3.5...3.8
4
3.3...3.5
4.5
3.1
5.5
2.8
6
2.5
6.5
2
7
1.8
8
1.4
8.5
1
9
[A]
25
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