el von duprin with nl-op

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No, the 98/99 series mortise exit device should be ordered as NL less trim. IE, 9875NL-L/TRIM. NL-OP suffix is normally used with the 98/99 series rim, surface and concealed vertical rod devices wh...
This option is not available as there is no NL cam to directly drive the rods and using a key to lift the heavy stainless, brass or bronze rods would damage the key. 
No, when ordering the Von Duprin exit device for use with the Ives VR trim, order the device as "EO" (exit only).  The Ives VR trim is provided with a cylinder retaining cup.  
This is possible: For metal doors prep door according to the 24R/V NL-OP Template or the 25R/V NL-OP Template and for wood doors use 24R/V NL-OP Wood Template or 25R/V...
Device would be ordered as a 25C-C as of June 2012. C nomenclature is for the Cylinder. 
The 388 Cylinder Control is required for the NL-OP function on a 33A/35A series exit devices. The 110NL is used on 22 and 98/99 series exit devices not 33/35A series devices.
You would have to order the device as 88NL less trim, the device will be shipped as an 88EO.  The EO device has an NL cam to accept a rim cylinder tailpiece.