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LiftMaster LA400PKGU Single Swing Gate Operator Kit - Click to enlarge!
  LiftMaster LA400DC Residential
  24V DC Swing Gate Operator

LiftMaster LA400PKGU & LA400DCS Double Swing Gate Operator - Click to enlarge!

The LA400DC has a powerful 24VDC motor, which provides exceptional starting torque and features soft start/stop operation. This promotes longer gate and operator life, as well as dependable performance. The LA400DC is capable of operating gates up to 16 feet long and weighing up to 850 pounds per gate leaf.

An on-board Security+ 2.0 radio receiver, included with the LA400DC, accepts up to 50 remotes or you can monitor and control your gate from anywhere with the MyQ® Technology using your cell phone (see manual). Exclusive from Chamberlain®, this provides a single remote control solution for gates and additional access points. Two 12V batteries included as standard.

The LA400PKGU Swing Gate Kit now includes the LMRRU Monitored Retro-Reflective Photo Eye, to meet the UL325 Standard.


  • Main Power (Motor) - 24VDC or solar power
  • Main AC Supply - 120VAC, .5 Amps (6.5 Amps including Accessory Outlets)
  • System Operating Voltage - 24VDC Battery Run / Direct Plug-in Transformer Charge
  • Accessory Power - 24VDC, 500mA max. for ON + SW (switched)
  • Surge - Industrial strength suppression on high and low voltage inputs
  • Solar Power Max - 24VDC at 60 watts max.
  • Maximum Gate Weight/Length - 850 lbs. / 10 ft.
      750 lbs. / 12 ft.
      650 lbs. / 14 ft.
      550 lbs. / 16 ft.
  • 90 Degree Travel Time* - 15-18 seconds
  • Maximum Daily Cycle Rate* - 100 cycles / day
  • Maximum Duty Cycle - 4 min. on
  • Operating Temperature - -4°F to 140°F(-20°C to 60°C )
  • Expansion Board - Optional
  • Inherent Entrapment Protection (Type A) - Dual - RPM and Current Sense
  • External Entrapment Protection (Type B1 and/or Type B2 - 3 inputs per board - any combination of up to 3 photoelectric sensors and up to 2 edge sensors
    * Travel time and range are affected by A and B mounting dimensions


  • On-board radio receiver - Compatible with all LiftMaster Security+ 2.0  315 and 390 MHz Transmitters. (up to 50 remote controls)
  • DC motor - slow start/stop operation - 24VDC powered motor with soft start/stop reduces stress and shock to the gate system by slowing down gate speed on initial open/close, promotes longer gate and operator life.
  • Battery-run system - Assures full function during power outage
  • Inherent obstruction sensing - If gate strikes obstruction, closing gate will reverse to open and an opening gate will stop
  • External obstruction sensing - Connections provided for external contact and non-contact safety devices
  • Control inputs - Inputs allow connection of external devices such as photo eyes, free exit probe, and wireless access equipment
  • Bi-part relay - Synchronized close feature.
  • Timer-to-close - Adjustable between 0 and 180 seconds.
  • LED indicators - Operator input, status and diagnostic LED's simplify setup and troubleshooting.
  • Electronic limit system - Simple-to-set electronic limit system with push of a button.
  • Keyed manual disconnect - External disconnect allow user to manually operate the gate.
  • Warranty - Manufacturer's 2 year warranty


  • Operator arm (two arms included for double gate kit)
  • AC Transformer
  • Two 7 AH 12 volt batteries
  • Control box/control board/surge protector board
  • Receiver Module 315 and 390 MHz
  • Mounting hardware
  • Monitored Retro-Reflective Photo Eye
  • Installation/safety manual
  • Caution signs
  • Picture of included parts

More Information (PDF):

Prices and Ordering:
LA400PKGU LiftMaster LA400PKGU 24V DC Residential Single Swing Gate Operator Kit
Includes Operator Arm, Photo Eye and Control Box
$ Add To Cart
LA400DCS LiftMaster LA400DCS Secondary Arm for Double Swing Gates
Includes Second Arm, 40' extension cable, Junction Box, and Hardware
$ Add To Cart


50-19503 Push-to-open Bracket (order one per operator) $ Add To Cart

Compatible Security+ 2.0 Transmitters

LA400DC Single Swing Gate Setup - Click to enlarge!
Typical LA400DC Single Swing Gate Installation
(click to enlarge)

LA400DC Double Swing Gate Setup - Click to enlarge!
Typical LA400DC Double Swing Gate Installation
(click to enlarge)

or by phone: 800-355-2335 toll free
We accept checks by fax or phone. Order on our secure server online! All LiftMaster LA400DC products are available using our convenient shopping cart or call 800-355-2335. LiftMaster products listed here and other related pages are registered trademarks of The Chamberlain Group, Inc.