Linear D-22A User Manual

D-22A

MATCH

4-8

D-22A CODE SWITCH SETTINGS FOR 8-CHANNEL RECEIVERS

SET
1 OFF
2 OFF
3 OFF

TRIGGERS RECEIVER CH 1

MATCH

4-8

SET
1 OFF
2 OFF

3 ON

TRIGGERS RECEIVER CH 5

MATCH

4-8

SET

1 ON
2 OFF
3 OFF

TRIGGERS RECEIVER CH 2

MATCH

4-8

SET

1 ON
2 OFF

3 ON

TRIGGERS RECEIVER CH 6

MATCH

4-8

SET

1 OFF

2 ON

3 OFF

TRIGGERS RECEIVER CH 3

MATCH

4-8

SET

1 OFF

2 ON
3 ON

TRIGGERS RECEIVER CH 7

MATCH

4-8

SET
1 ON
2 ON

3 OFF

TRIGGERS RECEIVER CH 4

MATCH

4-8

SET
1 ON
2 ON
3 ON

TRIGGERS RECEIVER CH 8

DIGITAL
TRANSMITTER

Code Setting
Instructions

[phone] • FAX [phone]

USA & Canada (800) 42 1- 15 87 & (800) 392-012 3

Toll Free FAX [phone]

STEP 2A

combination of OFF/ON codes and set them on switch keys 1-8
in the receiver (or note code already set in receiver if adding to
an existing installation). Match the same code on switch keys 1-8
in the transmitter.

CODING SWITCH IN SINGLE

Coding for single-channel receivers.

CHANNEL RECEIVER

SET KEYS 1-8 TO
ANY VALID CODE

OR NOTE EXISTING CODE

Pick any valid

CODING SWITCH IN

D-22A TRANSMITTER

MATCH CODE
ON KEYS 1-8

The D-22A is a hand-held digital radio transmitter often called a “Panic Button”.
The transmitter can perform a variety of remote switching tasks when used with
any of Linear’s Standard Digital “D” Series Receivers. Typically the D-22A is used
in wireless or hybrid wireless/hardwire security systems.
The transmitter is powered by a 9-volt battery. Activate the transmitter by pressing
and holding the pushbutton for at least two seconds. The red LED on the face
of the transmitter will glow as the unit transmits and the receiver with the matching
digital code will activate.
The Standard Digital radio format provides 256 different digital codes. The code
is set using the 8-position coding switches in the transmitter and receiver.

✶ CAUTION: All Standard Digital transmitters and receivers should be

recoded prior to installation and operation.

In order to avoid the possibility of duplicating codes in adjacent systems, factory
set codes should not be used. In addition, among the valid codes available, four
others should not be used. These include: all keys set ON or OFF and keys set in
an alternating ON/OFF or OFF/ON pattern.
The D-22A will transmit as long as the pushbutton is pressed. Depending on
conditions (interference, obstacles and distance to the receiver) the receiver output
may or may not stay activated for as long as the transmitter is sending a signal.

STEP 2B

Coding for two and four-channel receivers.

Pick
any combination of OFF/ON codes and set them on switch keys
3-8 in the receiver. Ma tch the same code on switch keys 3- 8 in the
transmitter. Set the

transmitter

switches 1 & 2 to select the

receiver

channel that it will activate. 2 & 4-Cha n n el r ec eiv er sw itch keys

1 & 2 are unused and can be set in any position.

2 OR 4-CHANNEL

RECEIVER

CODING SWITCH

KEYS 1 & 2
IN RECEIVER
ARE UNUSED

SET KEYS

3-8 TO ANY

VALID CODE

D-22A CODE SWITCH OPTIONS

MATCH
3-8

SET
1 OFF
2 OFF

TRIGGERS RECEIVER CHANNEL 1

MATCH
3-8

SET
1 OFF

2 ON

TRIGGERS RECEIVER CHANNEL 3

MATCH
3-8

SET

1 ON

2 OFF

TRIGGERS RECEIVER CHANNEL 2

MATCH
3-8

SET
1 ON
2 ON

TRIGGERS RECEIVER CHANNEL 4

STEP 1

Locate coding switch.

Remove the battery access
door located on the back of the transmitter case. Identify the
coding swit ch and note that it has eight positio ns, with ON and
OFF clearly marked.

REMOVE BATTERY
ACCESS DOOR

CODING
SWITCH

STEP 2C

Coding for eight-channel receivers.

Pick any
combination of OFF /ON co des an d set them on swit ch ke ys 4- 8 in
the receiver. Match the same code on switch keys 4-8 in the
transmitter. Set the

receiver

channel that it will activate. 8-Channel receiver switch

transmitter

switches 1, 2 & 3 to select the

keys 1, 2 & 3 are unused and can be set in any posit ion.

STEP 3

Test the equipment.

Connect the receiver to its power
source. With relay output receivers, listen for the relay click when
the transmitter is activated. A multi-meter can be used to detect
activation of relay and solid state output receivers. Operate the
transmitter from various locations to determine the radio range.

COMMON

MEASURE

RESISTANCE

NORMALLY

OPEN

RECEIVER

RELAY

OUTPUT

OUTPUT

DCV DCV

POWER

VOLTAGE

OUTPUT

RECEIVER

OUTPUT

MEASURE
VOLTAGE

MEASURE
VOLTAGE

POWER

SHORT

-TO-

COMMON

OUTPUT

RECEIVER

The battery should last 12 to 18 month s with normal u se. When

BATTERY REPLACEMENT

the red LED lights dimly, or not at all when transmitting, the battery
needs to be replace d. R em o ve the battery access door to change
the battery. Any type of 9-volt battery can be used. Replace the
battery do or an d f oam bat t ery pa d whe n f in ish ed .

REPLACE BATTERY WITH
FRESH 9-VOLT BATTERY

This Linear product is warranted against defects in material and workmanship for twelve (12) months. The
Warranty Expiration Date is labeled on the product.
buy direct from Linear or through Linear’s normal distribution channels.

to consumers.

any.

There are no obligations or liabilities on the part of Linear corporation 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 profit, or cost of removal, installation, or reinstallation.

warranties, including implied warranties for merchantability and implied warranties for fitness, are valid only until
Warranty Expiration Date as labeled on the product.

warranties express or implied.

For warranty service on Linear equipment return product, at sender’s expense to:
Linear Corporation Repairs Department
2580 Pioneer Avenue, Suite C
Vista, CA 92083

IMPORTANT !!!

Linear radio controls provide a reliable communications link and fill an important need in portable wireless
signalling. 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 transmitted 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 to the device may void FCC compliance.

✶

Infrequently used radio links should be tested regularly to protect against undetected interference or fault.

✶

A general knowledge of radio and its vagaries should be gained prior to acting as a wholesale distributor or

✶

dealer, and these facts should be communicated to the ultimate users.

Copyright © 1994 Linear Corporation 200855 D

LINEAR LIMITED WARRANTY

This warranty extends only to wholesale customers

Consumers should inquire from their selling dealer as to the nature of the dealer’s warranty, if

This Linear Corporation Warranty is in lieu of all other

Linear does not warrant this product

who

All implied