Emerson SolaHD SDU AC B-Series User Manual page 5

The SDU AC - B Series is a compact, "Off-Line" DIN rail mountable UPS, which provides conditioned
power to sensitive electronic equipment in an industrial environment. It supplies connected
equipment with stepped approximation to sinewave input during power outage to simulate the power
generated by the utility.
AC Mode
Input voltage range is 75% to 120% (ideal protection for the critical connected loads). Battery charging
occurs automatically when AC power is applied, no need to switch ON the UPS. The SDU also includes
an automatic self-test feature to test the UPS function and battery. UPSWatch will record the event on
EVENT LOG. UPS immediately switches to AC Mode to provide load power if AC is available from utility.
This SDU AC - B Series has a communication port that can accommodate an optional communication
card.
AC Loss
of Power
Figure 1: Transition to Back-Up Mode Due to Power Outage
SDU AC B-Series
A272-353 Rev. 1 2/2021
Battery Mode
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