Linear AK-21 User Manual

AK-21

Digital Keyless
Entry System

Installation and Programming Instructions

USA & Canada [phone] & [phone]

[phone]

Toll Free FAX [phone]

www.linearcorp.com

CONTENTS

COMPONENT LOCATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

WIRING DIAGRAM. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1

INSTALLATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Opening the Keypad . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Changing the Keypad’s Bezel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Install the Electrical Box and Mounting Plate . . . . . . . . . . . . . . . . . . . . . . 2

Final Keypad Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2

Keypad Wiring . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

Solid State Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3

FACTORY DEFAULTS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

BASIC PROGRAMMING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4

PROGRAMMING OPTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

RESETTING KEYPAD . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Master Reset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

Resetting the Master Code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

AK-21 OPERATION . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

LINEAR LIMITED WARRANTY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

IMPORTANT !!! . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

FCC NOTICE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6

INTRODUCTION

Linear’s AK-21 is a digital keyless entry system designed for access control
applications. The keypad is housed in a rugged, plastic enclosure and is designed
to be mounted in a standard single-gang electrical box. The die-cast keys have
bright, easy-to-read yellow graphics.

The Model AK-21 is supplied with four different plastic snap-on mounting bezels to
customize the look of the keypad. The satin-chrome bezel comes factory installed
on the keypad. The white, ivory & bronze bezels are packaged separately.

Up to 480 entry codes, from 1 to 6 digits in length, can be programmed. They can
activate either, or both, of the relay outputs. The “anti-passback” feature prevents
using the same code again before the programmed time elapses.

All system indicators and lights are long-lasting, solid-state LEDs. Two indicators
show the status of the entry system. The left indicator lights red to indicate power,
then turns green when access is granted. The right indicator lights yellow when
the keypad is in “lockout” condition (from too many incorrect code entries). The
keypad’s courtesy light dimly illuminates the keys at all times. The courtesy light
brightly illuminates the keys for two minutes after any key is pressed. An internal
sounder beeps when each key is pressed. An internal jumper sets the sounder
volume high or low.

The SENSE input can be used two ways. If programmed for “door sense” the
input is wired to a normally closed switch on the door to detect when the door is
open or closed. Forced entry or door ajar situations can then be detected. Using
door sense, the “Auto-relock” feature will prevent “tailgating” by turning off the
Main Relay output immediately when the door is closed after access has been
granted. If the SENSE input is programmed for “inhibit”, the input can be wired
to a “service” switch or automatic timer that will disable the Main Relay when
required.

The REQUEST-TO-EXIT input can be wired to a pushbutton to provide
codeless activation of Main Relay, Auxiliary Relay, Output #3, or Output #4
(programmable).

The ALARM SHUNT output activates when access is granted. This output can
be wired to shunt alarm contacts on the access door/gate to prevent triggering of
an alarm when authorized access occurs.

The AK-21 is powered from a 12-24 Volt AC or DC source. Power can be obtained
from the access device or a separate power supply. The EEPROM memory
retains all entry codes and programming, even without power. An internal jumper
is provided to reset the master code. The Main Relay has a 5 Amp capacity.
The Auxiliary Relay has a 1 Amp capacity. Two solid state outputs, capable of
switching 100 mA to common, are programmable to signal forced entry, door ajar,
lockout, alarm circuit shunting, request-to-exit, and keypad active conditions.

FEATURES

✓ FOUR INTERCHANGEABLE KEYPAD BEZELS

Supplied with Model AK-21

✓ KEYPAD PROGRAMMABLE

No programmer required

✓ 480 ENTRY CODE CAPACITY

Ideal for small & medium traffi c installations

✓ 1-6 DIGIT ENTRY CODE LENGTH

Flexible code length for different applications

✓ 4 INDEPENDENT OUTPUTS (TIMED/TOGGLED)

Each output’s action is programmable

✓ 4 INDEPENDENT TIMERS

Each output’s activation time is programmable

✓ TWO FORM “C” (N.O. & N.C) RELAY CONTACTS

Main Relay 5-Amp @ 28 VDC capacity,
Auxiliary Relay 1-Amp @ 28 VDC capacity

✓ EACH ENTRY CODE CAN ACTIVATE EITHER OR BOTH RELAYS

Specifi c entry codes can grant access to different doors

✓ TWO SOLID STATE OUTPUTS

Auxiliary outputs can indicate access status on external devices

✓ TWO STATUS INDICATORS (2-COLOR RED/GREEN & YELLOW)

Displays access, lockout, and programming information

✓ WHITE SOLID-STATE LED COURTESY LAMP

Programmable off/on/timed

✓ PIEZO SOUNDER (TWO SELECTABLE VOLUME LEVELS)

Programmable for beeps during key presses and output activations

✓ TIMED ANTI-PASSBACK

Disables entry code for a programmed time after use

✓ AUTO-RELOCK

Releases the main relay as soon as the door shuts

✓ KEYPAD LOCKOUT

Locks the keypad after too many incorrect entries

✓ TACTILE KEY FEEL

Assures complete key presses

✓ DOOR SENSE INPUT

For sensing door position to control auto-relock and door-ajar features

✓ INHIBIT INPUT

For temporarily disabling access with a timer or switch

✓ REQUEST-TO-EXIT INPUT

For codeless activation with a pushbutton

✓ KEYPAD CAN BE POWERED FROM 12-24 VOLTS AC OR DC

Power can be supplied from a transformer, battery, or power supply

COMPONENT LOCATIONS

RED/GREEN
POWER/ACCESS
INDICATOR

BEZEL

FACEPLATE

KEYPAD

YELLOW
"LOCKOUT"
INDICATOR

TERMINAL
BLOCK #2
(TB2)

SOLID STATE
WHITE LED
DOWN LIGHT

MOUNTING
PLATE

MASTER CODE
RESET JUMPER
(JP2)

TERMINAL
BLOCK #1
(TB1)

BEEPER
LEVEL
JUMPER (JP1)

WIRING DIAGRAM

POWER
SUPPLY

ELECTRIC

DOOR

STRIKE

TO ALARM

SYSTEM

ALARM

CONTACT

Figure 1. Component Locations

TYPICAL DOOR INSTALLATION WIRING

TERMINAL

BLOCK 2

1 - AC OR DC

2 - AC OR DC

3 - N.O.

4 - COM

5 - N.C.

6 - N.O.

7 - COM

8 - N.C.

AK-21 TERMINALS

12-24 VOLT

AC OR DC

POWER

MAIN RELAY

5 AMPS @

28 VDC MAX.

AUXILIARY

RELAY 1 AMP

@ 28 VDC MAX.

SENSE - 8

COM - 7

REQUEST-TO-EXIT - 6

EARTH GROUND - 5

OUTPUT #3 COM - 4

OUTPUT #3 - 3

OUTPUT #4 - 2

OUTPUT #4 COM - 1

TERMINAL

BLOCK 1

AUXILIARY

OUTPUTS
100 mA MAX.
TO COMMON

N.C. DOOR

SWITCH

REQUEST

TO EXIT

BUTTON

GROUND

STAKE

REQUIRED WIRING

OPTIONAL WIRING

OTHER WIRING

NOTES:

1. ALARM SHUNT SET FOR AUXILIARY RELAY

2. TERMINAL BLOCK #2, TERMINAL 8 SET FOR DOOR SENSE

Figure 2. Wiring Diagram

CAUTION

IF THE UNIT IS AC POWERED,
MAKE SURE THE SECONDARY OF THE
SYSTEM TRANSFORMER IS ISOLATED

FROM EARTH GROUND

1

INSTALLATION

Before installing the keypad, the unit must be partially
disassembled to access the mounting plate. The keypad’s bezel
can be exchanged for a different color when the keypad is apart.

Opening the Keypad

The keypad assembly is secured with two tamper-resistant screws
that are hidden behind the keypad’s faceplate. Refer to Figure 3 for
disassembly details.

❑ Use a small fl at blade screwdriver to pry off the keypad’s

faceplate.

❑ Use the special allen wrench (supplied) to remove the two

tamper-resistant screws.

❑ Separate the mounting plate from the keypad assembly.

PRY UP ON THE

1

FACEPLATE HERE

REMOVE THE

2

FACEPLATE

Install the Electrical Box and Mounting Plate

The keypad is designed to fi t into a standard single-gang electrical
box. Select a location near the controlled door and choose a
convenient height for the keypad. Be sure there is good wiring
accessibility for the unit’s power and the output to the door strike
or access device.

❑ Install the electrical box in the wall.
❑ Screw the mounting plate onto the electrical box (see

Figure 5).

INSTALL A SINGLE-GANG
ELECTRICAL BOX AT THE
PROPER LOCATION
FOR THE KEYPAD

MAKE SURE THE
TAB IS UP

MOUNTING

PLATE

3

REMOVE THE
TWO SCREWS

SEPARATE THE

4

MOUNTING PLATE
FROM THE KEYPAD

Figure 3. Opening the Keypad

Changing the Keypad’s Bezel

The colored keypad bezels snap onto the keypad assembly. Refer
to Figure 4 for details on changing the bezel.

❑ Gently pull on the edge of the bezel to release the tabs that

hold the bezel to the keypad assembly.

❑ Remove the bezel from the keypad assembly.
❑ Choose the proper color bezel for the installation and snap

it onto the keypad assembly.

SATIN-CHROME (FACTORY INSTALLED)

·
WHITE

·
IVORY

·
BRONZE

·

KEYPAD BEZEL COLORS:

KEYPAD
BEZEL

ATTACH THE MOUNTING
PLATE TO THE
ELECTRICAL BOX

MOUNTING
PLATE

Figure 5. Installing the Mounting Plate

Final Keypad Installation

After wiring the keypad (see next page), complete the installation
by securing the keypad to the mounting plate.

❑ If a lower beeper sound level is required, before installing

the keypad, remove Jumper JP1 (place the jumper block on
one pin to save the jumper).

❑ Hook the keypad assembly onto the mounting plate tab (see

Figure 6).

❑ Use the special allen wrench (supplied) to install the two

tamper-resistant screws.

❑ Fit the bottom tab on the faceplate into the slot on the

keypad then snap the top of the faceplate in.

1

HOOK THE KEYPAD ASSEMBLY
ONTO THE MOUNTING PLATE

2

INSTALL THE
TWO SCREWS

2

KEYPAD
ASSEMBLY

THE BEZEL SNAPS
ONTO THE KEYPAD
ASSEMBLY

Figure 4. Changing the Outer Bezel

4

3

FIT THE BOTTOM TAB OF
THE FACEPLATE INTO THE

SLOT ON THE KEYPAD

SNAP THE TOP

OF THE KEYPAD
INTO PLACE

Figure 6. Connecting the Keypad to the Mounting Plate

Keypad Wiring

See Figure 7 for an example of a basic door installation. The
keypad is mounted adjacent to the door. An electric door strike
is mounted in the door jamb to release the door lock. A magnetic
switch is mounted on the top of the door jamb for detecting when
the door is open.

Use the following steps to wire the keypad. Refer to the wiring
diagram shown in Figure 8 to assist in the wiring.

☞ NOTE: Up to 500 feet of 18 AWG wire can be run for power,

use larger wire for longer runs. Use 22 AWG or larger
(depending on the load) for other connections.

OUTPUT

❑ Install a low voltage electric door strike for unlocking the

door.

❑ Route two wires between the door strike and the keypad

box. Connect one of the door strike wires to the keypad’s
MAIN RELAY N.O. terminal (TB2 #3). Connect the other
door strike wire to the keypad’s AC/DC + terminal (TB2 #1).
Connect a wire between the keypad’s AC/DC - terminal
(TB2 #2) and the MAIN RELAY COM terminal (TB2 #4).

POWER

❑ Choose a location for the power supply or transformer.
❑ Route two wires between the power supply and the keypad

box. Connect the power supply’s output terminals to the
keypad’s AC/DC input terminals (TB2 #1 & #2). Observe
wiring polarity if using DC.

✦ CAUTION: If the unit is AC powered, make sure the

secondary of the system transformer is isolated from
earth ground.

EARTH GROUND

❑ To avoid damage to the unit from static discharges, connect

the EARTH GROUND terminal (TB1 #5) to a good earth
grounding point. Suggested wiring size is 18 AWG for earth
ground.

SENSE INPUT

☞ NOTE: SENSE terminal (TB1 #8) can be programmed for

either a door sense or inhibit input. Both features cannot be
used at the same time.

❑ To use the door sense feature to detect forced entry or door

ajar conditions, install a normally closed door switch on the
door and route two wires from the switch to the keypad box.
Connect the door switch to the keypad’s SENSE terminal
(TB1 #8) and COM terminal (TB1 #7).

❑ If an inhibit switch or timer is going to be used for

temporarily disabling the keypad, route two wires from
the switch or timer to the keypad box. Connect the inhibit
switch/timer normally open terminals to the keypad’s SENSE
(TB1 #8) and COM (TB1 #7) terminals.

REQUEST-TO-EXIT INPUT (wiring shown on Page 1, Figure 2)

❑ If a request-to-exit pushbutton is going to be used, route two

wires from the keypad box to a normally open pushbutton
mounted on the secure side of the door. Connect the wires
to the pushbutton and to the keypad’s EXIT (TB1 #6) and
COM (TB1 #7) terminals.

Solid State Outputs

The two solid state outputs (Output #3 & Output #4) can be
programmed to activate during various conditions. These outputs
can be used to activate indicators or sounders. See Figure 9 for
wiring examples using the solid state outputs.

DOOR

SENSE

SWITCH

2 WIRES

FOR DOOR

STRIKE

ELECTRIC

DOOR

STRIKE

12-24 VOLT

AC OR DC

POWER
SUPPLY

ELECTRIC

DOOR

STRIKE

TERMINAL

BLOCK 2

(TB2)

EXAMPLE #1

EXAMPLE #2

OUTPUT #4 COM

OUTPUT #3 COM

Figure 7. Basic Door Installation

TERMINAL

BLOCK 2

1 - AC OR DC

2 - AC OR DC

3 - N.O.

4 - COM

5 AMPS MAX.

5 - N.C.

6

7

8

TERMINAL

AK-21 REAR VIEW

EARTH GROUND - 5

TERMINAL

BLOCK 1

(TB1)

BLOCK 1

SENSE - 8

COM - 7

6

4

3

2

1

Figure 8. Basic Door Installation Wiring

OUTPUT #3 LIGHTS AN LED
OUTPUT #4 LIGHTS AN LED AND SOUNDS A BEEPER

DC

POWER

SOURCE

OUTPUT #3

OUTPUT #4

OUTPUT #3

OUTPUT #4

1

TERMINAL
BLOCK #2

1K Ω @ 12 volts

Ω

@ 24 volts

TERMINAL
BLOCK #1

3

2

OUTPUT #3 LIGHTS A LAMP POWERED FROM AN EXTERNAL SOURCE
OUTPUT #4 TRIGGERS A NORMALLY OPEN ALARM PANEL ZONE

3

2

1

4

2K

LED LED

END-OF-LINE
RESISTOR

N.O. ZONE

ALARM PANEL

COMMON

Figure 9. Using Solid State Outputs

MAIN

RELAY

N.C. DOOR

ELECTRONIC
BEEPER

LOW VOLTAGE
LAMP

POWER

SOURCE

2 WIRES
FOR DOOR

SENSE
SWITCH

AK-21
KEYPAD

2 WIRES
FROM
POWER
SUPPLY

1 WIRE
TO EARTH
GROUND

SENSE

SWITCH

GROUND

STAKE

EACH
OUTPUT
100 mA

MAXIMUM

3

FACTORY DEFAULTS

MASTER PROGRAMMING CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 123456

ENTRY CODE LENGTH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 DIGITS

REQUEST-TO-EXIT OUTPUT RELAY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .MAIN RELAY

ALARM SHUNT OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DISABLED

FORCED ENTRY OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OUTPUT #3

DOOR AJAR OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . OUTPUT #4

MAIN RELAY ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SECONDS

AUXILIARY RELAY ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SECONDS

SOLID STATE OUTPUT #3 ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SECONDS

SOLID STATE OUTPUT #4 ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 SECONDS

DOWNLIGHT ON TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 MINUTES

DOOR SENSE/INHIBIT INPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DOOR SENSE

KEYPAD LOCKOUT OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DISABLED

KEYPAD ACTIVE OUTPUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . DISABLED

BEEPER SOUNDS WHEN KEY PRESSED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . YES

BEEPER SOUNDS DURING RELAY #1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO

BEEPER SOUNDS DURING RELAY #2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO

BEEPER SOUNDS DURING OUTPUT #3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO

BEEPER SOUNDS DURING OUTPUT #4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO

KEYPAD LOCKOUT COUNT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 TRIES BEFORE LOCKOUT

ANTI-PASSBACK TIME . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . NO ANTI-PASSBACK

AUTO-RELOCK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ON

BASIC PROGRAMMING

When the AK-21 is in Programming Mode, both indicators will turn
off until programming begins. After a programming option number
is entered the yellow indicator will blink. This shows that the AK-21
is ready to accept the new programming data. After the new data
entry is complete, the yellow indicator will fl ash while the data is
being stored. The green indicator will light if the data is accepted.
The red indicator will light if any programming data is entered
incorrectly, and the command will have to be fully re-entered.

Entering Programming Mode

The 6-digit Master Programming Code (default = 123456) is used to enter
Programming Mode.

Press: # 9 # Master Code

Master Code = the current 6-digit Master Programming Code

Exiting Programming Mode

Press: * * #

The red indicator will light after exiting Programming Mode.

☞ NOTE: The AK-21 will automatically exit Programming Mode after two

minutes of inactivity.

Adding a New Entry Code

Press: 01 # Code # Code # Action #

Code = The new entry code: 1-999999, depending on code length

Action = Relay output entry code will activate as follows:

1 = Relay #1, timed open
2 = Relay #2, timed open
3 = Both Relays, timed open
10 = Relay #1, toggled
20 = Relay #2, toggled
30 = Both Relays, toggled
12 = Relay #1 toggled; Relay #2, timed open
21 = Relay #1 timed open; Relay #2 toggled

The yellow LED will fl ash quickly while the AK-21 searches its
memory for available space and duplicate entries. The green LED
will light when the new code is stored.

If the new entry code chosen is already being used for another
entry code, the red LED will light. A new unique code needs to be
entered.

☞ NOTE: Leading zeros (zeros before the code number, i.e. 0001) do not need

to be entered when programming a new entry code. The AK-21 will internally
add any zeros to fi ll all digits determined by the entry code length setting.
Leading zeros will have to be entered by the user when entering their code
to gain access.

Erasing a Single Entry Code

Press: 0 2 # Code # Code #

Code = The entry code to delete.

The yellow indicator will fl ash quickly while the AK-21 searches its
memory for the code to erase. The green indicator will light when
the code is erased.

Erasing All Entry Codes

★ WARNING: PERFORMING THIS COMMAND WILL

REMOVE ALL ENTRY CODES FROM THE MEMORY.

Press: 9 7 # 0 0 0 0 0 0 # 0 0 0 0 0 0 #

☞ NOTE: The green indicator will light while the memory is being erased. This

may take up to 15 seconds.

Changing the 6-Digit Master Programming Code

Press: 9 8 # Master Code # Master Code #

Master Code = The new 6-digit Master Programming Code

New master code: _____________________

Re-entering a Command After a Mistake

If the red indicator lights, signaling an incorrect entry, or an incorrect key is
pressed during programming, to clear the keypad and re-enter the command:

Press: * 9 #

Setting Entr y Code Length Default: 4 digits

Press: 0 3 # Length #

Length = 1 - 6 for entry code length

☞ NOTE: If the Entry Code Length is going to be changed from the factory

default of four digits, make this change fi rst, before programming any
entry codes.

4

PROGRAMMING OPTIONS

There are several AK-21 programming options. For most
installations, the factory set default options are suffi cient. The
keypad must be in Programming Mode to make these changes.

Select Door Sense or Inhibit Input Default: Door Sense

The input on Terminal Block TB1, Terminal #8 can be programmed for DOOR
SENSE or INHIBIT.

Press: 1 0 # Input #

Input = 0 for Door Sense, = 1 for Inhibit

When programmed for DOOR SENSE, if an open condition on the input occurs
before access is granted (with an entry code or with the request-to-enter input) a
FORCED ENTRY output will occur. If an open condition remains 60 seconds after
a relay activation for access, a DOOR AJAR output will occur.

When programmed for INHIBIT, a closed condition on the input will prevent
Relay #1 from activating when access is requested with an entry code. This mode
is typically used with an external timer to disable the access device at certain
times.

Select Request-to-Exit Output Default: Main Relay

Sets which output activates when the Request-to-Exit input is grounded. This
output may be timed or toggled.

Press: 1 6 # Output #

Output = Output to Activate (0-4)

1 = Main Relay, 2 = Auxiliary Relay, 3 = Output #3, 4 = Output #4, 0 = No Output

Main Relay On-time Default: 2 Seconds

Sets the length of time the Main Relay activates when triggered.

Press: 2 1 # Seconds #

Seconds = Output time in seconds (0-60)

Auxiliary Relay On-time Default: 2 Seconds

Sets the length of time Auxiliary Relay activates when triggered.

Press: 2 2 # Seconds #

Seconds = Output time in seconds (0-60)

Select Forced Entry Output Default: Output #3

Sets which output activates if the DOOR SENSE input opens before access is
granted. This output is not timed.

Press: 1 1 # Output #

Output = Output to Activate (0-4)

1 = Main Relay 2 = Auxiliary Relay 3 = Output #3 4 = Output #4 0 = No Output

Select Door Ajar Output Default: Output #4

Sets which output activates if the DOOR SENSE input stays open 60 seconds
after access is granted. This output is not timed.

Press: 1 2 # Output #

Output = Output to Activate (0-4)

1 = Main Relay, 2 = Auxiliary Relay, 3 = Output #3, 4 = Output #4, 0 = No Output

Select Keypad Lockout Output Default: No Output

Sets which output activates when the keypad is “locked out” after too many
incorrect entry code attempts. The lockout time is 60 seconds.

Press: 1 3 # Output #

Output = Output to Activate (0-4)

1 = Main Relay, 2 = Auxiliary Relay, 3 = Output #3, 4 = Output #4, 0 = No Output

Select Keypad Active Output Default: No Output

Sets which output activates when any keys are pressed. This output is timed. If
toggle mode is selected for the output, the timer value defaults to 2 seconds.

Solid-state Output #3 On-time Default: 2 Seconds

Sets the length of time Output #3 activates when triggered.

Press: 2 3 # Seconds #

Seconds = Output time in seconds (0-60), 99 = Toggle Mode

Solid-state Output #4 On-time Default: 2 Seconds

Sets the length of time Output #4 activates when triggered.

Press: 2 4 # Seconds #

Seconds = Output time in seconds (0-60), 99 = Toggle Mode

Set Downlight On-Time Default: 2 Minutes

Sets the time duration that the downlight remains on after a key press.

Press: 2 5 # Duration #

0 = Always off, 1 = 1 minute, 2 = 2 minutes, 3 = 3 minutes,

4 = 4 minutes, 99 = Always on

Beep Sounds on Keystrokes Default: Yes

Selects whether or not the keypad beeps as each key is pressed.

Press: 4 0 # Sound #

Sound = 1 for Yes, = 0 for No

Beep Sounds During Main Relay Default: No

Selects whether or not the keypad beeps during Main Relay activation.

Press: 1 4 # Output #

Output = Output to Activate (0-4)

1 = Main Relay, 2 = Auxiliary Relay, 3 = Output #3, 4 = Output #4, 0 = No Output

Select Alarm Shunt Output Default: No Output

Sets which output activates during the time access is granted. (Use this output
to shunt alarm contacts attached to the access door.) This output may be timed
or toggled.

Press: 1 5 # Output #

Output = Output to Activate (0-4)

1 = Main Relay, 2 = Auxiliary Relay, 3 = Output #3, 4 = Output #4, 0 = No Output

Press: 4 1 # Sound #

Sound = 1 for Yes, = 0 for No

5

Beep Sounds During Auxiliary Relay Default: No

Selects whether or not the keypad beeps during Auxiliary Relay activation.

Press: 4 2 # Sound #

Sound = 1 for Yes, = 0 for No

Beep Sounds During Output #3 Default: No

Selects whether or not the keypad beeps during Output #3 activation.

Press: 4 3 # Sound #

Sound = 1 for Yes, = 0 for No

Beep Sounds During Output #4 Default: No

Selects whether or not the keypad beeps during Output #4 activation.

Press: 4 4 # Sound #

Sound = 1 for Yes, = 0 for No

Keypad Lockout Count Default: 3 Tries

Sets the number of incorrect entry code attempts allowed before the keypad
“locks out”.

Press: 5 0 # Attempts #

Attempts = Number of attempts before lockout (2-7)

Anti-passback Time Default: No Anti-passback

Sets the length of time an entry code will not function after it is used.

Press: 5 1 # Minutes #

Minutes = Time in Minutes (1-4), 0 = No Anti-passback

RESETTING KEYPAD

Master Reset

✦ CAUTION: Performing a master reset will clear

the entire memory of the AK-21 and return all
programmable options to the factory default values.
ALL ENTRY CODES WILL BE ERASED.

STEP 1 Disconnect power from the keypad.
STEP 2 Press and hold down the * and # keys.
STEP 3 Apply power to the keypad, continue holding the keys

down until the red indicator starts fl ashing.

STEP 4 Release the keys. The red and yellow indicators will

remain lit until the process is complete, then the yellow
indicator will go out.

Resetting the Master Code

STEP 1 Open the AK-21 case.
STEP 2 Locate jumper JP2. This jumper is used to reset the

master code.

STEP 3 With power applied to the keypad, remove jumper JP2.

The keypad will begin to beep, signaling that the code
has been reset.

STEP 4 Replace jumper JP2.

THE MASTER PROGRAMMING CODE IS NOW 123456.

AK-21 OPERATION

Keypad users request access by entering their code.

❑ Users of the AK-21 have up to 40 seconds to key in their

entry code.

❑ Up to eight seconds are allowed between each keystroke.
❑ All digits of the entry code must be entered. Example: If the

code is 0042, the user must enter
“0 0 4 2”.

❑ If the wrong key is pressed, pressing the * key will reset the

keypad. The correct code can then be re-entered.

❑ After a correct code is entered, the red indicator will turn

green and the programmed relay will activate for the
programmed time.

❑ If the number of incorrect codes entered exceeds the

keypad lockout count, the yellow indicator will light,
indicating that the keypad is locked out. The lockout will
remain for one minute.

❑ After a valid code has been entered, it will be unusable until

the anti-passback time expires.

SPECIFICATIONS

MECHANICAL

Dimensions: 3.00” W x 5.00” H x 3.00” D

ELECTRICAL

Voltage: 12-24 Volts AC or DC

Current: 30 mA typical, 150 mA maximum

Outputs: Main Relay:
Form “C” 5 Amps @ 28 Volts maximum

Auxiliary Relay:
Form “C” 1 Amp @ 28 Volts maximum

Solid state outputs (Outputs #3 & #4):
Short-to-common 100 mA @ 24 VDC maximum

ENVIRONMENTAL

Temperature: -22°F to 149°F (-30°C to 65°C)

Humidity: 5% to 95% non-condensing

LINEAR LIMITED WARRANTY

This Linear product is warranted against defects in material and workmanship for twenty­four (24) months. The Warranty Expiration Date is labeled on the product. This warranty
extends only to wholesale customers who buy direct from Linear or through Linear’s normal
distribution channels. Linear does not warrant this product to consumers. Consumers
should inquire from their selling dealer as to the nature of the dealer’s warranty, if any.

There are no obligations or liabilities on the part of Linear LLC for consequential
damages arising out of or in connection with use or performance of this product
or other indirect damages with respect to loss of property, revenue, or profi t, or
cost of removal, installation, or reinstallation. All implied warranties, including implied

warranties for merchantability and implied warranties for fi tness, are valid only until Warranty
Expiration Date as labeled on the product. This Linear LLC Warranty is in lieu of all other

warranties express or implied.

All products returned for warranty service require a Return Product Authorization Number
(RPA#). Contact Linear Technical Services at 1-800-421-1587 for an RPA# and other
important details.

FCC NOTICE

Changes or modifi cations not expressly described in this manual or approved by the
manufacturer could void the user’s authority to operate the equipment.

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 a
particular installation. 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 relocate the receiving antenna.

• Increase the separation between the equipment and 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.

Copyright © 2007 Linear LLC 228045 A