Siemens SIDOOR ATD401W System Manual page 240

Power supply
6.5 Uninterruptible power supply (UPS)
In the observation, three main criteria need to be considered:
1. The peak power of the UPS (for approx. 3 seconds) should be ≥ 600 W.
2. With the use of the transformer, the UPS must be designed as an online double
converter. Classification: VFI (according to IEC 62040-3)
3. The energy storage of the UPS must be adapted to the entire drive system and the time
to be bridged.
Energy requirements
The entire energy requirements are derived from the following three physical effects:
● Energy requirements of the control unit → W
Quiescent current consumption of the controller over the time to be bridged
● Energy requirements due to holding powers → W
Current consumption due to continuous torques
● Energy requirements due to door movement W
Current consumption during traversing due to system friction and acceleration of the door
leaves
The energy to be stored by the UPS is therefore derived as follows:
The corresponding mathematical equations of these terms are as follows:
Energy requirements of the control unit
Energy requirements of the holding powers
Energy requirements of the door movement
Energy requirements of the UPS ACCU
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HOLD
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ATD4xxW Door Controller for Industrial Applications
System Manual, 01/2017, A5E38080677-AB