backset with removable mullion

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Question
Answer
The Von Duprin 4754, 4854, 9954, and 9854 mullions can be converted or ordered with key removable option. KR54-F kit is the conversion kit to convert the above mullions to key removable mullion.
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.
4754, 4854 and the 9854 are electrified mullions and handed as noted below: 4754 is not handed: Prepared for two 4263 monitor strikes. Use with all Von Duprin rim panic devices 4854 is han...
Backset dimensions will vary depending on the device, application and the opening configuration. If you have questions on specific device backsets, please e-mail your request (including a descripti...
The Falcon 25R rim device can be used with 6111 electric strike on single or double doors. Additional Information: The Von Duprin 4854/9854 mullion is required when using 25R with 6111 electric...
 For the backset see the Falcon template above, the "B" dimension would be 3-1/4".
Key removable option is not available for any of Von Duprin aluminum mullions.
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 Von Duprin electrified steel mullions, 4854 and 9854 come with a quick connector that connects the electric strike wires from the mullion to the frame through the top fitting.  ...