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1.  OPERATION 

(FOR 

PROGRAMMING

, PROCEED TO STEP 2)

This MMK200 Digital Keypad is designed for use with Mighty Mule automatic gate operators. The radio format provides unparalleled 
security with more than a million different codes.

To activate the automatic gate operator, the user enters their unique 1 to 6 digit long code on the unit’s keypad and presses the (

) button. 

For up to 30 seconds after the last activation, the keypad can be re-triggered by simply pressing the (

) button again. This allows the user to 

stop or reverse the opener quickly, without having to re-enter their code.

The keypad has built-in lighting for use at night or in dark areas. The clear silicone keys are backlit with a pleasing blue glow. Pressing any 
key will activate the backlight.

The Mighty Mule gate operator contains a built-in receiver that is 
programmed by sending a signal from the keypad. This stores the keypad’s 
code into the receiver’s memory. The receiver will retain its memory even 
without power and will only activate from the “memorized” keypad.

MMK200

Digital Keypad for 
Automatic Gate Operators

2.  PROGRAM A KEYPAD CODE TO THE OPENER (MODELS MM371, MM372, MM571, MM572)

On the control board, press and hold the 

S3

 

button 

(

) until LED2 [beside the 

S3

 

button

] illuminates and the buzzer sounds. Release 

the (

S3

button

 (

).

While the LED2 button is lit, enter a 1-6 digit code into the keypad. Then 

PRESS

 and 

HOLD

 the keypad’s 

 key until the opener 

BEEPS and the light BLINKS once. Repeat Steps 1 & 2 for any additional keypad codes.

DELETE A KEYPAD CODE:

 Follow Steps 1 and 2 (above) to delete (overwrite) an existing keypad code.

10021997 Rev-C

REMOVE THE BATTERY ASSEMBLY 
TO ACCESS THE SECOND MOUNTING 
HOLE (SEE 

CHANGING BATTERIES

BELOW).

ALIGN THE SCREW WITH THE 
MOUNTING HOLE AND TIGHTEN.

REPLACE THE BATTERY ASSEMBLY.

DRIVE THE PROVIDED SCREW 
INTO THE MOUNTING SURFACE 
(NOT ALL THE WAY). 

ALIGN THE SCREW WITH U-SHAPED 
SLOT ON THE BACK OF THE UNIT, 
INSERT AND SLIDE DOWNWARD 
UNTIL SECURE.

ADJUST THE SCREW DEPTH IF 
NEEDED. 

USE THE ANCHOR 
SUPPLIED IF REQUIRED

USE THE ANCHOR 
SUPPLIED IF REQUIRED

WALL MOUNTING

INSTALL 3 FRESH AAA BATTERIES
INTO THE CRADLE.

REPLACE BATTERY CRADLE AND 
SECURE THE SCREW.

REMOVE ONE SCREW THEN REMOVE 
THE BATTERY CRADLE.

REMOVE THE OLD BATTERIES FROM 
THE CRADLE, AND DISPOSE OF THEM 
PROPERLY.

CHANGING BATTERIES

KEYPAD OPERATION

MIGHTY MULE LIMITED WARRANTY

This product is warranted to the consumer against defects in material 
and workmanship for one year from the date of purchase. This warranty 
applies to first retail buyers of new devices. Mighty Mule will repair, or 
at its option, replace, any device it finds that requires service under this 
warranty, and will return the repaired or replaced device to the consumer 
at the Might Mule’s cost. For warranty service and return authorization 
(RA) contact Mighty Mule Tech Service. Devices must be sent to Mighty 
Mule for service at owner’s expense. The remedies provided by this 
warranty are exclusive. Implied warranties under state law are to the one 
year period of this written warranty. Some states do not allow limitations 
on how long an implied warranty lasts, so the above limitation may not 
apply to you. In order to be protected by this warranty, save your proof of 
purchase as it is required for a return authorization. This warranty gives 
you specific legal rights, and you may also have other rights which vary 
from state to state.
All products returned for warranty service require a Return Authorization 
(RA). Contact Mighty Mule Technical Services at 1-800-543-1236 for an 
RA# and other important details.

 

 

DAYTIME OPERATION

PRESS THE LIGHT (      ) BUTTON (TO LIGHT KEYPAD) 

NIGHTTIME OPERATION

1-6 DIGIT KEYPAD CODE THAT

WAS PROGRAMMED INTO THE OPENER

ENTER THE KEYPAD CODE

PRESS

ENTER THE KEYPAD CODE

PRESS 

1-6 DIGIT KEYPAD CODE THAT
WAS PROGRAMMED INTO THE OPENER



WARNING:

 Changes, modifications or adjustments not expressly approved 

by Nortek Security & Control could void the user’s authority to operate this 
equipment. There Are No User Serviceable Parts.

NOTICE:

 This device complies with Part 15 of the FCC Rules. Operation 

is subject to the following two conditions: (1) This device may not cause 
harmful interference, and (2) this device must accept any interference 
received, including interference that may cause undesired operation.
This device complies with Industry Canada License-exempt RSS standards. 
Operation is subject to the following two conditions: (1) this device may not 
cause harmful interference, and (2) this device must accept any interference, 
including interference that may cause undesired operation of the device.

DELETING A KEYPAD CODE (MM271 OR MM272)

Follow Steps 1 through 5 to delete the keypad code.

Note:

 If using the MM271, the gate must be in the closed position to delete an existing keypad code. It can be open or closed to program a 

new code.

SCREW ANCHORS

MOUNTING SCREWS

KEYPAD

PACKAGE INCLUDES

3 AAA batteries included.

 WARNING

KEEP BATTERIES OUT REACH OF CHILDREN. Swallowing batteries can 

lead to serious injury or death. If you suspect someone has swallowed a 

battery, go to the hospital immediately. Do not induce vomiting or eat or 

drink anything.  
For more information, call the National Battery Ingestion Hotline: 202-

625-3333. 
The battery identification number for this product is AAA Alkaline (LR03).

SOFT BLUE LIGHTS
ILLUMINATE THE KEYS
FOR NIGHTTIME USE.

THE        KEY STAYS ACTIVE FOR 30 SECONDS 
AFTER A CODE IS USED SO THE OPENER  
CAN BE STOPPED OR REVERSED.

TEN KEYS FOR ENTERING 
1-6 DIGIT KEYPAD CODES
USING NUMBERS OR LETTERS.

KEY FEATURES

Compatible with Mighty Mule      
automatic gate operators: 271, 
272, 371W, 372W, 571W and 
572W

Installation Instructions

PROGRAMMING A KEYPAD CODE (MM271 OR MM272)

1. 

Use the ON/OFF switch on the opener control box to 
power the system off.

2. 

Enter the desired 1-6 digit code into the keypad. 

PRESS

 and 

HOLD

 the 

 key, and continue to hold 

until instructed to release.

3. 

While still holding the 

 key, use the ON/OFF switch 

on the control box to power the system ON.

4. 

After the startup beep, there will be a silence for 5-10 
seconds, followed by an uninterrupted beep.

5. 

Release the 

 key after the beep.

S3

S2

S4

UP

DOWN

Press the 

S3 button (      )

©2021 Nortek Security & Control LLC. All rights reserved. 
Mighty Mule is a registered trademark of Nortek Security & Control LLC.

Mighty Mule Sales: 800-543-4283

  

|

  

Mighty Mule Technical Service 800-543-1236

For more information on Mighty Mule’s full line of Automatic Gate Operators, Gate Openers and Access Controls visit  

www.mightymule.com

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