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4640 Series

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The 4640 Auto Equalizer™ is LCN’s smart & reliable electrically powered low-energy power operator. It provides easy access for people with disabilities, the elderly, or the frail. Designed primarily for manual opening applications that occasionally require automatic opening.
Features and Benefits
  • NEW Digital Control Suite
  • Utilizes a 10,000,000 Cycle Heavy Duty Door Closer
  • On-Board Diagnostics
  • On-Board Power Supply
  • Factory-Default Memory
  • Plug-and-Play Connections
  • No Destruct Feature
  • No Guard Rails or Safety Mats Required


  • Standard, top jamb (push side) mounted 4640 series closer shipped with regular arm, metal cover, and wood and machine screw pack. Actuators available separately, see pages 199-215.
  • Meets ADA, requirements (power mode).
  • Non-sized cylinders for interior doors to 4’6” and exterior doors to 3’6”.
  • Non-handed for either right or left swinging door.
  • 4640 has easily accessible switches to provide on/off and continuous hold open functions. 4640CS provides concealed on/off power switch. Control module provides all timing and sequential door functions, electric strike controls and adjustments for opening speed and force.
  • Standard or optional custom powder coated finish, end caps are black.
  • Optional plated finish on cover, arm, and fasteners.

The 4640 Series is UL and cUL listed with regular arm for self-closing doors and meets the provisions of ANSI Standards A117.1, A156.19, and the Americans with Disabilities Act.

Arm Funcition*
Regular (Double)


*See individual series for maximum manual opening
Regular Arm, 4640-3077
Non-handed arm
Long Arm, 4640-3077L
Arm includes Long Rod and Shoe, 4640-79LR for deep reveals.
Rod & Shoe, 9140-79
Rod for use with regular arm
Long Rod & Shoe, 9140-79LR
Long rod for use with long arm
Top Jamb (Push Side)
  • Powder Coat
  • Plated
  • Metal
Cover, 4640-72MC
Standard, non-handed metal cover
Power Operator
*Meets ADA requirments (power mode)
**Switch provided for continuous Hold-Open (4640 only)
Cylinder Only, 4642-3971
Standard, non-handed, cast iron cylinder.
Cylinder Assembly, 4642-3071
Standard, non-handed, cast iron cylinder and mounting plate. Includes; 4640-3454 Motor Clutch, 4640-3180 I/O Board Assembly and 4640-3462 Controller.
Cylinder Assembly, 4642-3071CS
Standard, non-handed, cast iron cylinder and mounting plate. Includes; 4640-3454 Motor Clutch, 4640-3180 I/O Board Assembly and 4640-3462 Controller. Same as a 4640-3071 assembly except on/off switch is concealed in endcap and no hold open switch is included. (separate key switches suggested)
Installation Accessories
Switch End Cap, 4640-334
End cap (black powder coat only) with cut outs for installing and hold open switches.
Blank End Cap, 4640-334-2
Black power coat only.
Switch End Cap, 4640-334CS
End cap and switch (black powder coat only) for concealed switch option.
ON/OFF Switch Assembly, 4640-3179-1
Red rocker switch. Plugs into high voltage PC board.
Hold-Open Switch Assembly, 4640-3179-2
Black rocker switch. Plug into low voltage PC board.
PC Board Assembly, 4640-3180
High and low voltage PC boards connected to mounting bracket.
Motor/Clutch Assembly, 4640-3454
A geared assembly in an LCN power operator that incorporates a “no destruct” feature.
Control Box Assembly, 4640-3462
Digital controller with built-in 12/24 VDC power supply. Programming and timing functions are adjusted on controller.
AC Power Cable, 4640-3498-2
2 wire cable to connect 120 VAC from PC board assembly to controller.
Ribbon Cable Connector, 4640-3498-1
16 wire ribbon cable connecting 1-24 pin terminal connectors to controller.