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Are interchangeable core (IC) key cylinders compatible with the Von Duprin Alarm Kit (ALK) option?
The Von Duprin Alarm Kit (ALK) and Falcon Exit Alarm (EA) options are designed to use a 1 ¼" Mortise Cylinder with a straight cam (reference Schlage 20-001, L583-477 cam).
The cylinder can be either a Conventional cylinder or an Interchangeable Core (IC).
The length of the cylinder and the shape of the cam determine whether the cylinder will work in these features.
If a cylinder longer than 1 ¼" is used, then a blocking ring will be necessary to make up the difference..
For example, if the cylinder being used is 1 3/8" long (B dimension below from the faceplate to the back of the cam), then a 1/8" blocking ring would be necessary (1 3/8" - 1 ¼" = 1/8").
The blocking ring should be purchased with the cylinder.
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