How many contacts can be stacked behind the XACA and XACB operators?

Issue:
What is the maximum number of contacts that can be stacked behind the XACA  and XACB operators.

Product Line:
Push Buttons and Operator Interface

Environment:
XACA Pendant Station

Resolution:
They can not be stacked but you can have 2 contacts side by side behind each operator.

Released for: Schneider Electric USA