MEGACODE DIGITAL TRANSMITTERS
ACT-21, PART NO. ACP00607
ACT-22, PART NO. ACP00606A
The ACT-21 and ACT-22 digital transmitters are wireless radio controls
designed for use with AM/II or AccessPro receivers. In addition the MegaCode
code is compatible with Linear MegaCode receivers and can be used with MDR type
garage door and gate receivers.
The MegaCode radio format provides unparalleled security the format provides
more than 1 million different codes.
MegaCode transmitters and receivers do not contain a typical "coding switch".
Each transmitter is permanently coded at the factory to a unique code. The
receiverís programmed by "learning" the transmitterís unique code. The receiver
will activate only from these "memorized" transmitters.
Block coded versions of these transmitters (ACT-21 and ACT-22) can be ordered
from the factory. Block codes are divided up as 16 facility codes and 65,500
sequential local ID Codes. This will save time when programming and maintaining
large numbers of transmitters in an application.
The transmitters are powered by two 3 Volt "button" batteries, (type CR1616,
CR1620, DL1620 or equivalent). The batteries should last up to 5 years with
************* WARNING *************
Door can cause serious injury or death.
DO NOT install transmitter unless the door
operatorís safety reverse works as required by the door operatorís
Wall control must be mounted in sight of
door, at least 5 feet above floor and clear of moving door parts.
Keep people clear of opening while
door is moving.
DO NOT allow children to play with the
transmitter or door operator.
If safety reverse does not work properly:
Close door then disconnect operator
using the manual release handle.
DO NOT use transmitter or door
Refer to Door and Door Operators Ownerís
Manuals before attempting any repairs.
Electrical Shock can cause serious injury or death.
Power cord must be unplugged before
attaching any wires,
Be sure wire ends do not touch each
other or other terminals.
If you have questions or if you need a manual, contact the distributor or
manufacturer of the operator.
# 1 LOCATING THE PROGRAM BUTTON
MDR/MDRNR/MDR2 Program button and Led
Location. Locate the program button and LED on the side of the receiver case.
MDRM/MDRM2 Program button and LED Location. Locate the program button and
LED on the back of the receiver case.
# 2 PROGRAM RECEIVER
Momentarily press the receiverís program button (channel one or two). The red
programming LED will light if thereís room in the receiverís memory. A
transmitter must be entered while the LED is on. Press the desired
transmitter button. The LED will flicker indicating that the receiver has
accepted the transmitter.
NOTE: Be sure to press the receiver program button for less than 2 months.
WARNING: Door operator will not activate when the receiver is being
programmed from the transmitter, but the door operator will activate the next
time the transmitter is activated after programming.
NOTE: The programming LED also monitors radio signals entering the receiver.
It is common to see an occasional blink from the LED. The LED will also light
when any transmitter tuned to the receiverís frequency (programmed into the
receiver or not) is activated.
# 3 ADD ADDITONAL TRANSMITTERS
Repeat the steps above for each transmitter used with the receiver. Be sure
to press the receiverís program button each time a new transmitter or a
different transmitter button on a multi-button transmitter is pressed. If
the LED doesnít come on when the receiverís program button is pressed, the
receiverís memory is full. Use the erase function to remove transmitters from
the receiverís memory. (Refer to # 6 Erasing Receiver Memory).
#4 REVIEW MEMORY
Press and hold the receiverís program button (channel one or two) until the
LED begins to flash or flashes. The number of flashes equals the number of
transmitters programmed into the channel of the receiver.
NOTE: Donít hold down the programming button longer than 5 seconds, the
receiverís memory for that channel will be erased.
#5 TEST RECEIVER
Be sure door area is clear. Activate each transmitter. The receiver relay
should click, (relay output models only) and the operator should activate.
Wait 2 seconds between each activation.
#6 ERASING RECEIVER MEMORY
Transmitters may be erased for the receiverís memory by pressing and holding
the receiverís program button (channel one or two) for 5 seconds or more. After
the Led blinks (count of transmitters) it will blink one more time for channel
one and twice for channel 2 as the receiverís memory for that channel is erased.
All transmitters for each receiver channel are erased at the same time.
#7 CHANGING THE BATTERY
Open the case. Remove the two retaining screws from the rear of the case.
Hold the case halves together and flip the transmitter over. Lay the unit on a
table with the button(s) facing up. Carefully remove the case top.
Remove the board. WARNING: Hold board by edges only. Very carefully
remove the circuit board and set it aside. Notice how the batteries are
placed in the bottom case of the transmitter.
Replace the batteries. Remove the old batteries noting their location and
placement. Replace the batteries with fresh type CR1616, CR1620, or DL1620
batteries. Both batteries must be the same type. WARNING: Do not install
batteries backwards this will damage this unit. Be sure battery springs are
in place. The battery closest to the key ring loop should be minus (-)
side up, the battery near the board alignment posts should be plus (+) side up.
Replace fresh batteries on springs, in battery holder.
Carefully place the circuit board into the case over the batteries. Align the
board on the two case alignment posts. Hook the top case onto the bottom case
and squeeze the case together. Flip the case over and replace the two case
screws Test the transmitter for proper operation.
Linear radio controls provide a reliable communications link and fill an
important need in portable wireless signaling. However, there are some
limitations which must be observed.
For U.S. installations only. The radios are required to comply with FCC Rules
and Regulations as Part 15 devices. As such they have limited transmitter power
and therefore limited range.
A receiver cannot respond to more than one transmitter signal at a time and
may be blocked by radio signals that occur on or near their operating
frequencies, regardless of code settings.
Changes or modifications in the device may void FCC compliance.
Infrequently used radio links should be tested regularly to protect against
unidentified interference or fault.
A general knowledge of radio and the vagaries should be gained prior to
acting as a wholesale distributor or dealer, and these facts should be
communicated to the ultimate user.