Instruction manual

8
Base Unit
The base unit is a unique unit that can be selected by the
Unit Select switch on the front panel of the 400-ST1
cascade module (see “Unit Select Switch” on page 6).
One unit must be assigned as the base unit; all other units
must have their Unit Select switch set to Off.
Normally, any single unit in a stack configuration can be
assigned as the base unit, with the following restriction:
In a mixed stack configuration that contains one or more
Business Policy Switch units, a Business Policy Switch
must be configured as the base unit.
The physical ordering of all of the other units in the stack
are determined by the position of the base unit within the
stack. This is important for management applications that
view the physical ordering of the units within the stack.
Some characteristics of the base unit are:
Note:
If you do not designate a Business Policy
Switch as the base unit of a mixed stack configuration,
the stack configuration will not operate.