LiftMaster 850LM 3-Channel Universal Receiver

Application

The receiver can control up to three gates or commercial door operators. It can also be used with a 3-button remote control to operate the OPEN, CLOSE, and STOP functions of a commercial door operator.

Each channel supports a specific number of remote controls and keypads:

• CH1: 50 remote controls and 2 keypads
• CH2: 20 remote controls and 2 keypads
• CH3: 20 remote controls and 2 keypads

If a channel reaches its capacity, programming a new accessory will replace the first programmed accessory. A remote control button can only be programmed to one channel at a time; programming it to a new channel will erase it from the previous one.

Safety Warnings

WARNING: To prevent possible SERIOUS INJURY or DEATH from electrocution, ensure power is disconnected before installing the receiver.

WARNING: To prevent possible SERIOUS INJURY or DEATH from a moving gate or garage door:

• Keep remote controls out of children's reach. Never allow children to operate or play with remote controls.
• Activate the gate or door only when it can be clearly seen, is properly adjusted, and has no obstructions.
• Always keep the gate or door in sight until completely closed. Never allow anyone to cross the path of a moving gate or door.

WARNING: For residential openers, CONSTANT OPERATION is prohibited. When used with a commercial door opener, a safety reversing edge must be installed on the bottom of the door to prevent SERIOUS INJURY or DEATH.

Wiring

Refer to your commercial door operator or gate operator manual for specific wiring information. The receiver and antenna use TV Type F coaxial connectors. The antenna can be connected directly or remotely using an extension kit (Model 86LM or 86LMT).

Installation Steps:

1. Select a location for the receiver that provides access to terminals and space for the antenna. Ensure the antenna does not touch metal surfaces and is not bent or folded.
2. Fasten the receiver securely using the provided hook and loop fasteners or screws (not provided).
3. Connect power after installation. Power can be supplied by an 85LM plug-in or 95LM wired-in transformer, or directly from the operator (9-30V AC or 9-34V DC).

Note: The receiver can command the operator to close the door or gate via constant pressure, but this feature is only available with a wireless control panel (Model 885LM). To enable, press and hold the push bar until the gate or door moves to the closed position.

Programming

To Program a Single Button Remote Control:

1. Press and release the Learn button for the selected channel on the receiver. The corresponding LED will light up for 30 seconds.
2. Within 30 seconds, press and hold the button on the remote control you wish to program.
3. Release the remote control button when the receiver's LED blinks and turns off. Programming is complete.
4. Repeat for each remote control.

To Program a 3-Button Remote Control (Open, Close, Stop):

1. Press and release the CH1 Learn button on the receiver.
2. Within 30 seconds, press the desired OPEN button on the remote control.
3. Press and release the CH2 Learn button on the receiver.
4. Within 30 seconds, press the desired CLOSE button on the remote control.
5. Press and release the CH3 Learn button on the receiver.
6. Within 30 seconds, press the desired STOP button on the remote control.

Note: If a remote button is not pressed within 30 seconds, the LED for the selected Learn button will turn off. Repeat the programming steps.

To Erase Memory:

1. Press and hold the Learn button for the desired channel.
2. Release the button when the corresponding LED turns off. The memory is now erased.

Specifications

• Contact Rating: 5 Amps, 28 Vac or dc Max.
• Power: 9-30V AC or 9-34V DC, 50mA, 60Hz
• Code Format: Security+2.0

Note: If your operator does not meet these power specifications, a transformer (Model 85LM or 95LM) is required.

Compatible Accessories

• Remote Controls: Models 811LMX, 813LMX, 891LM, 893LM, 890MAX, 893MAX, 892LT, 894LT
• Keypads: Models 877LM, 878MAX
• Antenna Extension Kits: Models 86LM, 86LMT
• Antenna Only: K77-36541

Regulatory Information

This device complies with Part 15 of the FCC rules and IC RSS-210. Operation is subject to two conditions: it must not cause harmful interference, and it must accept any interference received, including interference that may cause undesired operation. Modifications are prohibited.

Technical Support

For technical support, call 1-800-528-2806.