Panasonic FP E Series User Manual page 72

Note) The procedure for the removal is the same as AFP0811.
Note:
When using an expansion unit, tighten the screws after joining all of the slim type mounting plate to be
connected. Tighten the screws at each of the four corners.
[Example] When using the maximum numbers of the expansion units (with AFP0811, AFP0803)
5-6