Three different controller boards will already allow it to be used as a standalone and provides opportunities for combination. Three boards make 6 controller combinations possible so altogether 9 controller versions. A combination of two controllers is a parallel structure and will allow PL_d applications to be realized with a Cat.3 structure. Can you imagine how many possibilities 4 or 5 boards provide us with? Some of these standalone boards already have a parallel structure and are therefore very cost effective.

This modularity makes it easy to always find the right system structure and to have the right inputs and outputs available! So why do we call the controller a sandwich controller? There is always an underpart and an upperpart and something nice in-between!