LiftMaster Toroidal Transformer Kit Installation Guide

Overview

The Toroidal Transformer Kit enhances gate operator performance by providing a transformer-run system. It is compatible exclusively with 120 Vac or 240 Vac LA500 gate operators featuring firmware version 5.1 or higher. Refer to the specific application instructions. Note that the bottom accessory outlet cannot be used concurrently with this kit, and both accessory outlets are incompatible with 240 Vac applications. The images provided are for general reference; your product may differ visually.

• Model LA500HDTKITXLM is designed for converting a Large Metal Control Box (XLM).
• Model LA500HDTKITSTD serves as a replacement toroid for a standard control box.

⚠️ WARNING

To reduce the risk of SEVERE INJURY or DEATH:

• All maintenance on the operator or in its vicinity must only occur after disconnecting electrical power (AC and battery) and securing the power via the operator's power switch. The area must be cleared and secured before returning the unit to service.
• Disconnect power at the fuse box before proceeding. The operator must be properly grounded and connected according to national and local electrical codes. Ensure the operator is on a separate fused line with adequate capacity.
• All electrical connections must be made by a qualified individual.
• Do not install any wiring or attempt to run the operator without consulting the wiring diagram. It is recommended to install an edge sensor before proceeding with control station installation.
• All power wiring should be on a dedicated circuit and well-protected. The power disconnect location must be visible and clearly labeled.
• All power and control wiring must be run in separate conduits.

Check Firmware Version

The Toroidal Transformer Kit requires operators with firmware version 5.1 or higher. Refer to Figure 1 for standard control boxes and Figure 2 for Large Metal Control Boxes (XLM).

1. Locate the yellow diagnostic LED on the main control board.
2. Disconnect AC/DC power to the main control board for 15 seconds.
3. Reconnect power. The yellow diagnostic LED will flash rapidly, pause, then flash the version number, pause, and then flash the revision number. (Example: For version 5.1, the LED flashes rapidly, pauses, flashes 5 times, pauses, then flashes once).

Figure 1: Standard Control Box Description

Illustration showing the exterior of a standard control box, indicating the location of the yellow diagnostic LED.

Figure 2: Large Metal Control Box (XLM) Description

Illustration showing the exterior of a Large Metal Control Box (XLM), indicating the location of the yellow diagnostic LED.

Getting Started

Main power supply and control wiring must be run in separate conduits. Refer to Figure 3 for standard control boxes and Figure 4 for Large Metal Control Boxes (XLM).

Wire Gauge and Maximum Lengths

NOTE: Use copper conductors ONLY.

1. Disconnect ALL POWER.
2. Open the control box cover and unplug the transformer from the accessory outlet.
3. Remove the junction box cover.
4. Disconnect the power wires from the accessory outlet wires.
5. Remove the J-15 connector from the control board.
6. Disconnect the J-15 connector wires from the batteries. Discard the old J-15 connector.

Figure 3: Standard Control Box Diagram

Illustration showing the internal wiring of a standard control box. Key components labeled include: Transformer, J-15 Connector Wires, J-15 Plug, Accessory Outlet Wires, Junction Box Cover, Power Wires.

Figure 4: Large Metal Control Box (XLM) Diagram

Illustration showing the internal wiring of a Large Metal Control Box (XLM). Key components labeled include: J-15 Connector, J-15 Battery Connector Wires, J-15 Plug, Accessory Outlet Wires, Junction Box Cover, Power Wires.

Installation

The following images illustrate the installation of the LA500HDTKITSTD toroidal transformer for the standard control box. For the Large Metal Control Box (XLM) (model LA500HDTKITXLM), the toroidal transformer may appear slightly different.

1. Connect the power wires to the toroidal transformer assembly (refer to Figure 5-A).
2. Connect the ground wire (refer to Figure 5-A).
3. Ensure the plug is connected to either the 120 Vac or 240 Vac connector on the EMI board, based on your application. The factory default is 120 Vac (refer to Figure 5-B).
4. Connect the white and black wires from the 120 Vac connector plug to the accessory outlet wires (refer to Figure 5-C). Do not connect to accessory outlet wires if using the 240 Vac option.
5. Connect the ground wire from the accessory outlet to the ground screw on the toroidal transformer assembly (refer to Figure 5-D).

Figure 5: Standard Control Box Wiring Diagram

Detailed illustration of the toroidal transformer assembly being connected to a standard control box. It shows connections for power wires, ground wire, the 120 Vac connector on the EMI board, and accessory outlet wires. Labels include: Accessory Outlet, ground, white, black, 240 Vac Connector, 120 Vac Connector, Power Wires, ground.

Installation Continued

1. Install the toroidal transformer assembly into the control box, replacing the old junction box cover. Discard the old junction box cover (refer to Figure 6-A).
2. Connect the black and red wires from the new J-15 connector (provided) to the batteries (refer to Figure 6-B).
3. Connect the black and red wires from the new J-15 connector to the bridge rectifier on the toroidal transformer assembly (refer to Figure 6-C).
4. Plug the J-15 connector into the J-15 connector plug on the control board (refer to Figure 6-D).
5. Connect ALL POWER.

AC Power Switch

The AC Power switch on the toroidal transformer assembly controls the incoming 120/240 Vac power. This switch only affects AC power to the control board and does not interrupt battery power or power to the accessory outlets.

Figure 6: Toroidal Assembly (Front) for Standard Control Box Wiring Diagram

Illustration showing the toroidal assembly connected to a standard control box. Key connections and components labeled: J-15 Connector Plug, Toroidal Assembly, Bridge Rectifier, AC Power Switch, Control Board, Batteries, J-15 Connector, Standard Control Box. Shows connections between the toroidal assembly, bridge rectifier, batteries, and the control board.

Wiring Diagrams

The following diagrams illustrate the wiring for both standard and Large Metal Control Box (XLM) configurations. Always follow safety warnings and ensure proper connections.

Standard Control Box Wiring Diagram

This diagram details the connections for a standard control box. It shows the input power connection, EMI filter/surge protection board, transformer (200 VA), bridge rectifier, batteries (12V 7AH), accessory power outlets, and connections to the control board. Optional components like solenoid locks, maglocks, antennas, photoelectric sensors, and loop detectors are also indicated with their respective wiring paths. The diagram emphasizes disconnecting power before servicing and using correct fuse types.

Large Metal Control Box (XLM) Wiring Diagram

This diagram illustrates the wiring for the Large Metal Control Box (XLM). It includes the input power connection, transformer, bridge rectifier, batteries, accessory power outlets, and connections to the control board. Similar to the standard box diagram, it shows optional component connections (locks, sensors, detectors) and highlights safety precautions. The layout differs slightly due to the XLM enclosure.