Series LLC in Illinois

[Shawn H.]

I'm looking for information on Series LLC's, or maybe clarification. The way I understand it, a regular LLC in Illinois: $500 setup Articles of Organization, $250 annual fee, all properties within LLC are vulnerable to the others.
Series LLC: $750 setup Articles of Organization + $50 for each additional series, $250 annual fee, only properties within each series are vulnerable to one another. The application says the Series name must contain the entire LLC name and be distinguishable from the other names in the series. (ABC Rentals 1, ABC Rentals 2...??). Am I understanding correctly?