Depending on the physical arrangement of actual zones on the Center Line, the Merge Zone can be assigned to either the Upstream or Downstream zone of its particular . It can also be assigned to a that is configured as a single zone ZPA controller.

In all 4 of these examples, Node 2 is the Merge Zone’s controlling

Merge Zone on Upstream Zone

Merge Zone on Downstream Zone

Single Zone Module

Whenever an has been Auto-Configured as a single zone; regardless of whether the single zone is connected to the right side or left side of the , the logical designation for the zone on the this module is always the Upstream Zone. Shown below are examples of a single zone module using the left and right sides of the module respectively.

Merge Zone on a Single Zone Module's Left Side

Merge Zone on a Single Zone Module's Right Side