Operating principle

If the voltage in the DC link reaches a value that falls below the "24 V supply" voltage range (see figure), the MDS90A power supply unit cannot convert the voltage into 24 V. As a result, the electronics of the control cabinet that is supplied by the MDS90A power supply unit is switched off completely. In case of a power failure, the remaining runtime (e.g. for data backup) until the switch-off threshold is reached is calculated by the RemainingRunTimeCalculator on the assumption that there is a continuous power consumption and, therefore, an almost linear energy flow at the DC link. If no power failure was detected, the value for the remaining runtime is 0 ms.