mullion cylinder cam

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Answer
L583-446; Schlage Adams Rite MS modular cam used on 1 1/8", 1 3/8" and 1 5/8" cylinders    L583-447; Schlage Adams Rite MS modular cam used on 1 1/4", 1 1/2" and 1 3/4" cylinders  B502-944; Sch...
 A 1 1/4" cylinder with straight cam is required for the Von Duprin SD (Special Dogging) exit device option.
The cylinder cam must be inverted with the SD option to work properly.
A modular cylinder's length is determined by 4 basic parts; a cam screw, cam, plug extension, and a back housing.  Most of these parts are used in more than one cylinder length and...
The Von Duprin CD kit comes with the cover plate machined to accept the cylinder dogging mortise cylinder.1 1/4" mortise cylinder with an inverted straight cam is required for CD option on Von Dupr...
Von Duprin KR (key removable) mullions requires a 1-1/8" or 1-1/4" mortise cylinder with the standard straight cam, the cam is not inverted. Please see chart below for part numbers. 
instructions
The KR4023 mullion requires a 1-1/4" mortise cylinder with straight cam. This is stated in box 7 on the first page of the KR4023 mullion instructions.