Conair TrueBlend TB45-4 User Manual page 108

Operation TrueBlend™
In this example, when a loader on blender 2 has a demand, it will send it's request
to the waiting list on blender 1. The loader is put into the queue of blender 1's
waiting list, and when the blower is available and the loader is the next in the list,
the loader and blower will be operated to convey the material.
Example 2
Suppose that you wish to add a second blower to the above system to use as a
spare blower while doing maintenance on the blower connected to blender 1. The
blower may be added to Blender 2's electrical controls. When you wish to use this
blower you have two options in the control (obviously the piping etc. must be
correct also):
106 Edition: February 2007