Mighty Mule FM136 User Manual

ACCESS CONTROLS

IMPORTANT: Allow the

intercom base unit’s battery to
charge for 12 hours before using

the system for the rst time.

Base Unit

Wireless Gate Entry Intercom

Installation Instructions

Crystal clear two-way wireless communication up to 500 feet

Thank you for purchasing the Mighty Mule Wireless Gate Entry Intercom.

Please read the directions carefully and completely before installing.

SAFETY NOTE:

NEVER install the keypad portion
of this system where a person can
reach through the gate to activate it,
or where a person can touch the gate
while activating the keypad.

The recommended minimum distance
between the gate and keypad is 10 ft.

Keypad Unit

rev - 09-20-10

GTO - Gates That Open, LLC • 3121 Hartseld Road • Tallahassee, Florida 32303

Telephone [phone] • Fax [phone] • www.mightymule.com

©2010 GTO - Gates That Open, LLC

Features of the Wireless Intercom/Keypad

The Wireless Intercom/Keypad has two separate units: the KEYPAD and the BASE UNIT. The keypad should be mounted
outside the gate allowing visitors to press the CALL button from their vehicle. The base unit is powered by a rechargeable
battery; the charge is maintained by the transformer. It can also be disconnected from the transformer allowing it to go
anywhere within range for convenience. Up to three additional base units can be added for convenience in different

locations throughout the house.

When someone without an access code approaches the gate, they can press the CALL button on the keypad which will
ring the base unit inside the house. To answer the CALL, the person inside presses and holds the ANSWER button to
talk to the person at the gate, releasing the ANSWER button to listen. To allow the person calling to open the gate, the
GRANT PERMISSION button must be pressed. Then the person at the gate can press any number key on the keypad to
open the gate. The END CALL button terminates the calls and the ON/OFF switch can be used to conserve power when
using unit on battery (note: the base station will not recieve a signal if turned OFF).

Up to 25 different personal Entry Codes may be programmed into the keypad, allowing you to give different temporary
and permanent Entry Codes to different users. For example, you can give a delivery person their own temporary entry
code, which you can easily change after he has made the delivery.
while still allowing those to whom you gave permanent Entry Codes full access.

After entering a valid code, pressing any key on the keypad while the gate is opening will stop the gate; pressing any key
while the gate is stopped will cause the gate to reverse direction. The keypad will not af

gate opener system.

This will prevent him from being able to regain access,

fect the auto-close setting of your

The keypad will light up and the unit will beep at the press of any key.
code in a string of up to 20 digits. If it nds the correct sequence, it will activate the gate opener.

The keypad memory will recognize your entry

As a security feature,
the keypad will shut down for 40 seconds if it does not nd the correct code sequence within a 20-digit string. This will
discourage an unauthorized person from trying to use random numbers to access your property.

Entry Codes will remain stored in memory even when the batteries go dead. The keypad will remember your Entry Codes
as long as you don’t press the RESET button.

IMPORTANT: In areas of high radio frequency (RF) interference, the keypad may need to be connected (hard
wired) directly to the gate opener using 16 gauge (AWG) stranded, direct burial, low voltage wire (RB509, not

included).

FCC WARNING: Changes or modications to this unit not expressly approved by the party responsible for compliance could
void the user’s authority to operate the equipment.

NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15
of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential
installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance
with the instructions, may cause harmful interference to radio communications.

However, there is no guarantee that interference will not occur in particular installations. If this equipment does cause
harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user
is encouraged to try to correct the interference by one or more of the following measures: • Reorient or replace the receiver
antenna. • Increase the separation between the equipment and the receiver. • Connect the equipment into an outlet on a circuit
different from that to which the receiver is connected. • Consult the dealer or an experienced radio/TV technician for help.

The contents of all material available on this installation manual are copyrighted by Gates That Open, LLC (“GTO”), unless otherwise indicated. All rights are reserved by GTO, and

content may not be reproduced, downloaded, disseminated, published, or transferred in any form or by any means, except with the prior, written permission of GT

publications is by permission only. Copyright infringement is a violation of federal law.

GTO®, GTO/PRO®, Mighty Mule® are registered trademarks of GTO - Gates That Open, LLC. GTO Access Systems™ is a trademark of GTO - Gates That Open, LLC. These marks are the

exclusive property of GTO - Gates That Open, LLC (“GTO”). All rights are reserved by GTO, and these marks may not be used, in any form, without the prior, written permission of GTO.

rev - 09-20-10

O. Any reprinting of GTO

Keypad Description

RELAY
OUTPUT

AC/DC
POWER IN

123456789

+
0
–

ID SET

+

–

–

–

+

+

–

+

RESET

JUMPER

1

2

ABC

3

DEF

4

GHI

5

JKL

6

MNO

7

PRS

8

TUV

9

WXY

0

CALL

STATUS

PROGRAM

CALLING

GRANTED

Keypad Front

CALLING Light:
LED is RED when calling and turns
GREEN when call is answered.

CALLING

1 2

ABC3DEF

4

GHI5JKL6MNO

7

PRS8TUV9WXY

0

PROGRAM

CALL

GRANTED

STATUS

GRANTED Light:
LED turns GREEN when access

permission is granted.

PROGRAM button:

Used to program entry codes.

STATUS Light:
This LED will blink once when any

key is pressed and provides visual

feedback when programming entry

codes.

1. Install Batteries

Four (4) AA batteries (not included) are required to power the keypad. If an
external DC power supply such as the gate opener’s battery is used (see

2.B.“Hard-Wired Installation”), the AA batteries will act as a back up.

Step 1: Remove the two screws from the bottom of the keypad and separate

the keypad from its housing.

Step 2: Install four (4) AA batteries (not included).

Keypad Interior

DIP Switches:
Match the keypad dip switch settings with
your entry transmitter’s dip switch settings.

Power Input:

Used to connect keypad to gate opener battery

for continuous power supply.

Relay output:

Used to connect the keypad to gate opener

control board in hard-wired applications.

RESET button:
Pressing this button for 2 seconds will reprogram

the keypad to factory settings. All codes are

deleted. Default Master Code is “1234.”

ID SET button:
Used to reassign new code only when there is
another pair of GTO wireless intercom units

nearby causing interference.

Battery Holder:
Use 4 AA batteries.

2. Install Keypad

A. Wireless Installation

For wireless applications, the keypad must be in the line of sight of the gate opener
receiver and no more than 50 ft. away from the receiver. Always test the keypad

range before permanently mounting it. NOTE: a metal housing or metal object

could cause interference.

Step 1: Mount the keypad housing using the

LED

1 2 3 4 5 6 7 8 9

+

0

–

A23S 12V

ALKALINE BATTERY

ECE

+

0
–

123456789

B. Hard-Wired Installation

To power the keypad with the gate opener’s battery and hard wire the communication between the
keypad and the gate opener, you will need to run two pairs of wires: one pair to hard-wire the keypad

to the gate opener’s control board; the other pair to connect the keypad to the gate opener’s battery.

Step 1: Turn the gate opener’s power switch OFF. Use two pairs of 16 gauge (AWG) stranded,
direct burial, low voltage wire (RB509) to connect the keypad to the gate opener control board and
battery. Run wire through PVC pipe from the ground to keypad and from the ground to the opener
control board to protect it from lawn mowers or grazing animals.

Determine how the wires will enter the keypad (e.g., from the back through a hole drilled in the post;
running the wire on the post surface). Remove the small rectangular knock-out on the back of the
keypad housing and pull the wires into the housing. Then mount the housing to the post using the
screws provided.

rev - 09-20-10

screws provided.

Step 2: Set the keypad DIP switches to
match your entry transmitter’s DIP switch

settings.

NOTE: If you have not adjusted your gate opener’s entry transmitter from the factory setting,
see the “Personalize Transmitter Settings” section in the gate opener’s installation manual.
Then set the keypad DIP switches to match the entry transmitter DIP switch setting.

Step 3: Slide the keypad into the housing and secure with the small screws provided.

1

Knock-out