layout "A" - linear unit with metal cover

What´s the meaning of an "A" in the layout name of Wagner-Linear-Units?

Good question! Please see:  A is the first letter of the German word "Abdeckung" what simply means "cover" .

The name of the linear unit is as used to be - only extended with the letter "A".

See following table as an overview of available product families:

module layout with cover cover
LEM-6 LEM-6-MA open on one side, fixed at front panels
LEK-6 LEK-6-KA open on one side, fixed at front panels
LEM-9 LEM-9-MA open on one side, fixed at front panels
LES-6 LES-6-SA fully enclosed, with bellows
LES-9 LES-9-SA fully enclosed, with bellows

In case of the longest strokes at LES-6 (400mm) and LES-9 (500mm) the bellows reduce the stroke a bit (385mm and 489mm).