Häfele WT 200 Instructions De Montage Et De Maintenance page 85

The spacers on the add-on module must fit inside the slots
on the controller exactly (Fig. 23/1).
The plug-in connections on the add-on module (Fig. 24/1) must
fit inside the plug-in connections on the controller (Fig. 23/2).
5. If the add-on module is not in the correct position, push it onto the spacers on the
controller.
6. Reattach the cover on the controller.
The 6 additional connection options (Fig. 25/2) are now available on the controller
screw terminals.
Fig. 25: I/O board add-on module connected to controller
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