Dimensioning The Backup Capacitor - Siemens ASIC SIM 1-2 Function Manual

For simatic net
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2.4.4

Dimensioning the Backup Capacitor

To allow a correct startup behavior, the set constant current consumption and the
backup capacitors C
Secondary capacitor C
The dimensions of the secondary capacitor of transformer C
large depending on the constant current:
C
< IBUS * 0.5 µF/mA
DCDC
Capacitor C
The following applies to capacitor C
C
> 2 * Ü * C
VE
Capacitor C
The following applies for capacitor C
C
≤ 47 µF
VREG
SIM 1-2
C79000-G8976-C215-01
and C
must be matched up.
VE
DCDC
DCDC
VE
where Ü = V
DCDC
DCDC
VREG
Functional Description of the SIM 1-2
:
VE
/VE
:
VREG
must not be too
DCDC
27

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