What's the difference between ATS22..S6U and ATS22...S6 Softstart models?

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Issue:
Differences between an ATS22..S6U and ATS22..S6 soft start models.

Product Line:
Altistart 22 ATS22

Environment:
All models, All series

Cause:
Altistart has difference voltage suffix S6U and S6.

Resolution:
The ATS22..S6 model requires 220vac control power and has 24vdc logic inputs.

The ATS22..S6U model requires 110vac control power and has 110vac logic inputs.