1. Introduction
The LiftMaster 850LM Universal Gate and Garage Door Opener Receiver is designed to provide secure and convenient access control for gated communities, industrial facilities, and commercial sites. Utilizing Security+ 2.0 technology, this universal receiver minimizes radio interference and enhances security. It is compatible with LiftMaster 811LM, 813LM, and all MAX remote controls, offering a versatile solution for various access needs.
Image: The LiftMaster 850LM Universal Receiver unit.
2. Setup and Installation
The 850LM receiver features a compact design suitable for most gate and commercial door operators. It expands to three channels, allowing for control of multiple devices or functions:
- Channel 1: Supports up to 50 remote controls.
- Channel 2: Supports up to 20 remote controls.
- Channel 3: Supports up to 20 remote controls.
2.1. Wiring the Receiver
The receiver requires a 12 Volts (DC) power supply. Connect the power wires to the AC/DC terminals on the receiver. For triggering the gate or garage door opener, connect the Normally Open (N.O.) and Common (COM) terminals of the desired channel on the 850LM to the corresponding trigger input terminals on your gate or garage door operator's control board. Ensure all connections are secure and follow the wiring diagram provided with your specific gate or garage door operator for proper integration.
2.2. Programming Remote Controls
To program a remote control to the 850LM receiver:
- Identify the desired channel button (CH.1, CH.2, or CH.3) on the 850LM receiver.
- Press and hold the channel button on the receiver. The corresponding LED light will illuminate, indicating it is in programming mode for approximately 30 seconds.
- While the LED is illuminated, take your compatible remote control (e.g., 811LM, 813LM, or MAX remote).
- Press and hold the button on the remote control that you wish to program.
- The LED on the receiver will flicker and then turn off, indicating successful programming.
- Release the button on the remote control.
Repeat this process for any additional remote controls or channels you wish to program.
3. Operating the Receiver
Once programmed, the remote controls can be used to operate the connected gate or garage door opener. Pressing the programmed button on your remote will send a signal to the 850LM receiver, which then activates the corresponding channel to trigger the operator. The 850LM supports various functions such as open, close, and stop, depending on how the channels are configured and wired to your operator's control board.
4. Maintenance
To ensure optimal performance and longevity of your LiftMaster 850LM receiver, consider the following maintenance tips:
- Keep the receiver unit clean and free from dust, debris, and moisture.
- Periodically inspect all wiring connections to ensure they are secure and free from corrosion or damage.
- Test your remote controls regularly to confirm they are functioning correctly and replace batteries as needed.
5. Troubleshooting
If you encounter issues with your 850LM receiver, try the following basic troubleshooting steps:
- No Response from Remote: Check the remote control's battery. Ensure the receiver has power and its indicator lights are on. Re-attempt the remote programming procedure.
- Intermittent Operation: Verify that the receiver's antenna is unobstructed and properly positioned. Check for potential sources of radio interference in the vicinity.
- Power Issues: Confirm that the power supply to the receiver is stable and within the specified voltage range (12V DC).
For persistent issues, consult a qualified technician or contact LiftMaster customer support.
6. Specifications
| Feature | Detail |
|---|---|
| Manufacturer | Liftmaster / Chamberlain |
| Part Number | 850LM |
| Item Weight | 1.6 ounces |
| Product Dimensions | 6 x 5 x 3 inches |
| Item Model Number | 850LM |
| Is Discontinued By Manufacturer | No |
| Color | Grey |
| Material | Polycarbonate |
| Voltage | 12 Volts (DC) |
| Item Package Quantity | 1 |
| Certification | FCC Part 15 |
| Included Components | Receiver, Transmitter |
| Batteries Included? | No |
| Batteries Required? | No |
| Battery Cell Type | Alkaline |
7. Warranty Information
For detailed warranty information regarding your LiftMaster 850LM Universal Receiver, please refer to the documentation included with your product or visit the official LiftMaster website. Warranty terms and conditions may vary.
8. Customer Support
Should you require further assistance with installation, operation, or troubleshooting, please contact LiftMaster customer support. Contact information can typically be found on the product packaging or the official LiftMaster website.
