Von Duprin 6211 Electric Strike for Mortise or Cylindrical Locks

The Von Duprin 6211 is a heavy-duty Grade 1 electric strike from Von Duprin's 6200 Series designed for mortise locks without a deadbolt and cylindrical locks on single doors, 4-7/8" x 1-1/4" centered faceplate, 1,500 lb static holding strength, 70 ft-lbs dynamic impact strength, field selectable fail safe or fail secure, and UL 10C listed for fire-rated openings. American Locksets stock the 6211. Free shipping on orders over $300 and same-day shipping available. 

What the 6211 Is and What It Does

An electric strike replaces the standard fixed strike plate in the door frame. Instead of a rigid lip that always accepts the latchbolt, the 6211 has a movable lip (the keeper) that releases on command from an access control system, keypad, card reader, or receptionist button. When the keeper releases, the latchbolt can ride up over it and the door opens with a pull. No one needs to retract the latch, and no key is needed from outside for entry.

The 6211 specifically handles mortise locks without a deadbolt and cylindrical locks. That distinction matters. If your mortise lock has an active deadbolt, you need the 6210, not the 6211. The 6211's keeper geometry accommodates the springlatch not the deadbolt throw and strike pocket inserts are provided in the box to accommodate different manufacturers' deadlocking trigger locations.

Fail Safe vs Fail Secure: Choosing the Right 6211

Fail Secure (FSE): The default condition is the keeper lip is locked when the strike has no power. Apply voltage and the lip releases for entry. On power failure, the door stays locked. This is the correct specification for perimeter security doors, server rooms, and any opening where uncontrolled access during a power failure is unacceptable. The FSE version is fire-rated.

Fail Safe (FS): Power holds the lip locked. Lose power and the lip releases, allowing free entry. This is the correct specification for egress-critical paths, stairwells, main exits, and any door where free exit during a fire alarm or power outage is required by code. The FS version is not fire-rated and should not be installed on fire-rated openings.

The 6211 Template and Door Prep

The 6211 uses Von Duprin template 30215_b (Mortise/Cylinder Single Door Application, dated 08-29-16), available for download from Von Duprin's Allegion documentation library. The frame cutout accommodates the 4-7/8" x 1-1/4" faceplate with a 3-3/8" ramp cutout and 1-11/16" backbox depth. Installation uses two #12-24 machine screws. Target clearance between the latchbolt and the strike lip is 1/32" the 6211's adjustable backbox compensates for minor misalignment between door and frame without requiring frame modification.

Four installation notes from the official template that every installer needs to confirm before specifying: deadlatch function is not guaranteed on cylindrical applications; door position monitoring can be affected by door/frame preparation; signal tripper function with 3/8" throw bolts is not recommended; no deadbolt action is available for mortise applications.

The 6211 retrofits the Von Duprin 3140 and the Folger Adams 712 electric strike directly, making it the standard upgrade path for buildings with older Von Duprin hardware still installed in frames.

Specifications

Model: Von Duprin 6211

Series: 6200 Series Electric Strike

Application: Mortise locks without deadbolt and cylindrical locks, single door

Faceplate: 4-7/8" x 1-1/4", Pullman keeper, centered configuration

Backbox Depth: 1-11/16"

Ramp Cutout: 3-3/8"

Latchbolt Throw: 3/4"

Static Strength: 1,500 lbs holding strength

Dynamic Strength: 70 ft-lbs impact strength

Voltage Options: 12VDC (0.60A, 21Ω, 7.5W continuous) or 24VDC (0.33A, 83Ω, 8W continuous). 24VAC is also available.

Fail Mode: Fail Secure (FSE) de-energized locks, energized releases, fire-rated. Fail Safe (FS) energized locks, de-energized releases, non-fire-rated.

Frame Application: Hollow metal standard. 6211WF variant for wood frame.

Connectors: Two-piece plug connectors for ease of installation and strike servicing

Adjustable Backbox: Yes compensates for door/frame misalignment

Retrofit: Replaces Von Duprin 3140 and Folder Adams model 712

Template: 30215_b Mortise/Cylinder Single Door Application

Mounting: Two #12-24 screws. 1/32" clearance between latchbolt and keeper lip.

Finish: US32D/630 satin stainless steel standard. US10B/613 oil rubbed bronze available.

Options: DS (dual monitor switch), DS-LC (low current dual monitor switch), CON (Allegion Connect compatible)

Certifications: UL 1034, UL 10C single door and pair door, ANSI/BHMA Grade 1

American Locksets has stocked Von Duprin 6200 Series electric strikes since 2001.