Chamberlain 1025 User Manual

To comply with FCC/IC rules, adjustment or modification of receiver and/or
transmitter is prohibited, except for changing the code setting and replacing the
transmitter battery. THERE ARE NO USER SERVICEABLE PARTS.

WARNINGWARNING

Disconnect power to the garage door or gate
opener before installing the receiver.

Children operating or playing with a garage door or
gate opener can injure themselves and others.

garage door or gate could close and cause serious
injury or death.

Do not allow children to operate the

push buttons or the remote control transmitters.
Install the receiver (and any additional push

buttons) out of the reach of children and away from
all moving parts of the door or gate and its
hardware, but

where the garage door or gate is

visible.
A moving garage door or gate could injure

someone under it.

Activate the opener only when
the door or gate is properly adjusted, you can see it
clearly, and there are no obstructions to door or
gate travel.

The

Access Control Receiver
ACRx 2 Model 1025
OWNERS MANUAL

ACRx 2

RELAY OUTPUT

N.O. contacts

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MODEL 1025LM

HAZARDOUS VOLTAGES!

exit

SCROLL

0-9, A-Z

SERIAL PORT

VOLT
SELECT

BLOCK USERDELETE USERENTERADD USERDEVICE SETUP

GRANT ACCESS

24

VAC

TM

12/24

EXT.

VOLTS

GRANT

AC/DC

SWITCH

WARNING

Install the control station and receiver where the
door or gate is visible, but away from the door or
gate and its hardware. When a receiver is used to
activate a commercial door opener, a reversing
edge MUST be installed on the bottom of the door.

Failure to install a reversing edge under these
circumstances may result in serious injury or death
to persons trapped beneath the door.

FEATURES

Code Memory

Input/Output Connections
Power Supply
Output Control Circuit

Output Control Rating
Case

Display
Time Clock
RS-232 Interface

1025 users with unique radio codes (any combination of 60 series remote controls, 80 series remote
controls, 90 series “SECURITY+” remote controls, 66LM keypad, 67LM “SECURITY+” keypad, 466LM
commercial keypad, or 99LM keypad remote control codes). Each radio code can have a 5 digit alpha­numeric user name assigned to it.

Terminal block inside case. Two screws each for power, relay output, and command.
24 V AC/DC or 12 V DC.
Relay switching controlled by radio transmitters, or GRANT ACCESS button on control panel, or external

push-button.
Relay Switches Up to 3 Amps at 37 VAC max.
The ACRx 2 is mounted in an 8" x 10" x 3" metal box, with an integrated hinged lid. All electrical

connections can be made through a conduit hole; a type-F connector is available externally for antenna
mounting. Keylock provided for securing panel against undesired entry.

16 Character non-backlit, LCD display
Time and date are maintained by a real time clock with battery backup. Expected battery life is 10 years.
An RS-232 interface is provided. This interface is 1200-9600 Baud, 8 bits, no parity, 1 stop bit. This

allows use of a computer or printer to record access transactions. This interface can also be used to
back up code memory to a computer with the use of Microsoft Windows-compatible software available
from Lift-Master.

INTRODUCTION

The ACRx 2 is a radio receiver which controls a gate or door
opener. It can recognize as many as 1,000 different transmitters.
It assigns a unique identification code to the user of each
transmitter, and can produce a record of when each one is used to
gain access. The ACRx 2 can be easily programmed by any
authorized person to add new users, remove users, suspend users
temporarily, or open the gate or door by pushing one button. It
can be connected to a computer for additional control and
recordkeeping functions.

Once the ACRx 2 is installed, it may be programmed by the

installer or by the custodian of the gate. The same procedures are
used to make changes at a later time.

INSTALLATION

Mechanical and electrical installation must be performed by
qualified, professional service personnel. Knowledge of electrical
codes may be necessary when wiring AC power and certain door
actuators. If in doubt, consult with Lift-Master commercial
product service at 1-800-588-2806.

ACRX & ANTENNA MOUNTING INSTRUCTIONS

Mounting the Box

Choose a location for the ACRx 2 1025 control box which is:

• Protected from tampering

• As close to the approaching vehicles as possible for best
reception.

• Protected from moisture.

• Suitable for permanent attachment by mounting screws.

• Accessible to necessary wiring.

Hold the ACRx 2 control box in its intended mounting
location. Make sure the cover opens freely, with the display and
controls at a comfortable height and angle for viewing and use.
Use the holes in the ACRx 2 box for marking and drilling
attachment holes.

Antenna Placement

For best range, placement of the antenna is crucial. Follow
these guidelines for best results.

•Make sure there is no interfering signal an the same channel as

the ACRx 2. You can monitor channel activity with the
Liftmaster M-18 Test Set. On-channel interference is not only
due to transmitters, but can also be caused by computing
devices, security systems, and other nearby electronic devices.
Power invertors and battery chargers are known sources of
interference.

• The ACRx 2 antenna system can be configured in several
ways. Each installation is different, so there is no best antenna
system. Try the different configurations of antenna placement
and amplifier until the best range is encountered. Do this
BEFORE hard -mounting the antenna and permanently routing
the cable.

The typical antenna configurations are as follows on page 3:

• The antenna must not be next to, or enclosed in, metal.

• Place the antenna outside of any housing, box, or building,
even if the housing is not made of metal. Non-metallic
structures can contain conduit, metallic-foil insulation, or be
painted with metallic paint.

• Place the antenna as high as possible, in sight of the expected
location of the transmitters. This is very important.

• Consider the direction from which the transmitters will be
used. Place the antenna so that there are no structures or metal
obstructions between the transmitters and receiving antenna.•
Make certain that the amplifier, if used is oriented correctly.
The label indicates the end of the amp which must be connected
to the ACRx 2 or to the cable leading to the ACRx 2. The amp
will not work properly if installed backwards.

• If longer coaxial cable is needed, do not splice cables together.
Instead, purchase a ready-made cable of the desired length from
a radio/tv store. Use 75-ohm cable with CATV connectors
(also called type “F” connectors).

WIRING INSTRUCTIONS

Wiring requirements

Power can be provided with an 85LM wall mount transformer or

Radio Power from a gate operator (17 to 37 V AC/DC at 150
mA or 12 VDC at 200 mA minimum.)

Using an 85LM wall mount transformer: Install the voltage
select jumpers (J4 & J6) in the 24v position and plug the
transformer jack into the receptacle to the right of the voltage
jumper. Wire the relay contacts to Push Button and Common as
shown in the wiring diagram

Using gate/door operator power: Install the voltage select
jumpers (J4 & J6) in the position that matches the power
supplied by the operator. Wire ACRx 2 to the operator as
shown in the wiring diagram.

WIRING DIAGRAM

RELAY OUTPUT

N.O. contacts

Place jumpers on bottom 2 pins for 24V operation

N.E.C. CLASS 2

❷

WIRING ONLY

Voltage select jumpers:

Place both jumpers on top 2 pins 12v operation

❷

WARNING

The ACRx 2 uses low voltage wiring only. Attach the
ACRx only to circuits or devices that are NEC Class 2
(less than 37VAC). Do not run wires to or from the
ACRx 2 in any conduit or box where there are AC
supply (120VAC) circuits. Failure to follow this
warning could result in electrical shock or fire and
damage to the ACRx 2.

EXT.

SERIAL PORT

12

SELECT

VAC

12/24

24

VOLTS
AC/DC

GRANT

SWITCH

Push Button

Common

Doorbell

Button

Radio Power

2

relay

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USER

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USER

GRANT

ACCESS

ENTER

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USER

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DEVICE
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12 /24v
AC/DC

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24v

wallpack

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SERIALPORT

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9

Lift-Master

ACRx
model G1000

16 CHARACTERLCD

relay

BLOCK

USER

DELETE

USER

GRANT

ACCESS

ENTER

exit

ADD

USER

SCROLL

DEVICE
SETUP

12 /24v
AC/DC

external

GRANTsw.

24v

wallpack

RELAY

OUTPUT

N.O. contacts

SERIALPORT

V
O
L
T
A
G
E

S
E
L
E
C
T
O
R

!

HAZARDOUSVOLTAGESPRESENT!
KEEP TERMINALS COVERED

audio alert

A

Z 0

9

Lift-Master

ACRx
model G1000

16 CHARACTERLCD

relay

BLOCK

USER

DELETE

USER

GRANT
ACCESS

ENTER

exit

ADD
USER

SCROLL

DEVICE

SETUP

12 /24v

AC/DC

external

GRANTsw.

24v

wallpack

RELAY
OUTPUT

N.O. contacts

SERIALPORT

V
O
L
T
A
G
E

S
E
L
E
C
T
O
R

!

HAZARDOUSVOLTAGESPRESENT!
KEEP TERMINALS COVERED

audio alert

A

Z 0

9

Lift-Master

ACRx
model G1000

16 CHARACTERLCD

relay

BLOCK

USER

DELETE

USER

GRANT
ACCESS

ENTER

exit

ADD
USER

SCROLL

DEVICE
SETUP

12 /24v
AC/DC

external

GRANTsw.

24v

wallpack

RELAY
OUTPUT

N.O. contacts

SERIALPORT

V
O
L
T
A
G
E

S
E
L
E
C
T
O
R

!

HAZARDOUSVOLTAGESPRESENT!
KEEP TERMINALS COVERED

audio alert

A

Z 0

9

Lift-Master

ACRx
model G1000

16 CHARACTERLCD

ANTENNA CONFIGURATIONS

A. No amplifier, no cable (short radio range).

Antenna is mounted direct to ACRx 2.

ANTENNA

B. No amplifier, coax cable used (short radio range).

Antenna is mounted away from the ACRx 2 at the end of
the 15ft cox cable.

COAXABLE CABLE

ANTENNA

C. Amplifier used, without the cable (longer radio range).

Amplifier is connected to the ACRx 2, and the antenna
is connected directly to the amp.

ANTENNA

AMPLIFIER

MOUNTING
BRACKET

D. Amplifier and caox cable used (longer radio range).

Antenna is remote mounted, along with amp - amplifier
is at the far end of the cox with the antenna, not at the
ACRx 2 end. This provides the best amplification of
the only desired signal.

COAXABLE CABLE

ANTENNA

AMPLIFIER

MOUNTING
BRACKET

3