Liftmaster LA500UL / LA500DCS 24VDC Residential / Light Commercial Secondary Swing Gate Opener Operator

Liftmaster LA500UL / LA500DCS 24VDC Residential / Light Commercial Secondary Swing Gate Opener Operator

The LA500DCS is the matching secondary actuator for LiftMaster LA500 dual swing gate systems. It is the correct second arm when an LA500 primary package is used on a two-leaf swing gate installation.

This part is frequently ordered when upgrading a single LA500 gate to a dual system or replacing a damaged secondary arm. It should be matched to the LA500 control platform and not mixed with LA400 or LA412 arms.

On dual LA500 installations, both gate leaves must be mechanically sound and correctly sequenced. A secondary arm problem can be caused by cable damage, incorrect control settings, obstruction faults, or a failing gate hinge, so the full system should be checked before replacement.

Compatible With

Operator and model family

• LiftMaster LA500UL dual swing gate systems
• LiftMaster LA500PKGUL primary systems when configured for dual operation
• LiftMaster LA500DCS secondary actuator applications
• Residential and light-commercial dual swing gates within LA500 rating
• Select LA500DC primary arm systems with proper control box and wiring

Not compatible with

• LA400DCS or LA400UL systems
• LA412DCS or LA412UL solar systems
• RSW12U articulated-arm swing operators
• Single-gate installations without a primary LA500 control system

Features and Specifications

Also Known As / Related Part Numbers

• LA500DCS
• LA500 Secondary Arm
• LA500UL
• LA500PKGUL
• LA500DC
• LA500CONTUL
• LA500-DCS

Technician Note

If a dual LA500 gate leaf stops moving, check the secondary cable, terminal connections, gate travel, and control board diagnostics before replacing the arm.

Before Ordering Checklist

• Confirm this is an LA500 dual swing gate system.
• Confirm the needed part is the secondary arm, not the primary LA500DC arm.
• Inspect cable, conduit, terminals, and actuator connector.
• Verify both gate leaves move freely by hand and have proper stops.
• Confirm monitored safety devices and dual-gate timing are set correctly.

Professional Advisory

Dual LA500 systems can involve maglocks, loops, access control, and multiple safety devices. A qualified gate technician should perform final testing after replacement.

Important Ordering Warnings

• Do not use LA500DCS as a complete stand-alone opener package.
• Do not mix LA500DCS with LA400 or LA412 systems.
• Do not bypass monitored entrapment devices during troubleshooting.

Product Q&A

What is LA500DCS used for?

LA500DCS is the secondary actuator arm used on dual LiftMaster LA500 swing gate systems.

Is LA500DCS the same as LA500DC?

No. LA500DC is the primary arm. LA500DCS is the secondary arm for the second gate leaf.

Can this be used on an LA400 gate?

No. LA500DCS is for the LA500 platform and should not be used on LA400 systems.

What should I check if the secondary gate leaf does not move?

Check cable continuity, terminals, control board settings, safety inputs, gate travel, and actuator condition.

Does LA500DCS require monitored safety devices?

Yes. The complete LA500 system must use required monitored entrapment protection devices.