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DXT-31
DOOR/WINDOW
TRANSMITTER
Installation Instructions
(619) 438-7000 • FAX (619) 438-7043
USA & Canada (800) 421-1587 & (800) 392-0123
Toll Free FAX (800) 468-1340
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DXT-31 FEATURES PRODUCT DESCRIPTION
The DXT-31 is a battery powered stationary transmitter designed for use with Linear’s DX Format
receivers. This transmitter can be used in a limitless number of wireless remote control applications.
Triggering the transmitter with its built-in magnetic switch, an external switch or an external glass
break detector sends a digitally coded wireless signal to its companion receiver. Pressing the
transmitter’s case sends a test transmission.
The digital DX code format features over a million possible codes. The DX transmitters are precoded
at the factory to unique codes, so no field coding is required. The DXT-31 can send three different
codes: alarm, restore and low battery.
For versatility, any transmitter can be programmed into any receiver channel. Receivers must be
programmed to the transmitter code before system testing and operation. Refer to the receiver’s
instructions for details on programming.
In a typical installation, the magnet is mounted on a door or window and the transmitter is mounted
on the frame. When the magnet moves more than 1/2" away from the transmitter, an alarm signal
is sent. When the magnet returns next to the unit, a restore signal is sent. Alarms and restores can
also be sent from external contacts wired to the terminal block. Pressing the case sends a test
transmission that indicates the current state of the contacts.
The transmitter is powered from two 3-Volt #2032 lithium batteries with an expected battery life of
up to 3 years. The red test/operate indicator lights during operation and test. It will blink during
operation and test when the batteries are low.
A three-position terminal block is for connection to normally closed external contacts or a normally
open “Window Bug” type glass break sensor. An internal jumper selects which input to use.
Selections are: internal switch only, external switch only, both external and internal switch, and glass
break sensor.
A snap-on transmitter mounting plate is provided for easy installation. The magnet has four height
positions. An additional snap-on magnet spacer is provided for a total of eight magnet positions.
NOTE: Functioning of the slide switch marked INSTANT and DELAYED on the bottom of the
DXT-31 depends on the receiver used. With some receivers, it has no function.
OPENING CASE COMPONENT LOCATIONS
EXAMPLE DOOR INSTALLATION EXAMPLE WINDOW INSTALLATION
MAGNET
DXT-31
TRANSMITTER
NOTCH ON SIDE OF
TRANSMITTER
ALIGN MAGNET
NEXT TO NOTCH
1/2" SPACE
MAXIMUM
TEST/OPERATE
INDICATOR
PUSH CASE
TO TEST
INDICATOR
LIGHTS DURING
TRANSMISSION
OPENING WINDOW MOVES
MAGNET AWAY FROM
TRANSMITTER
TRANSMITTER
MOUNTS ON
FRAME
MAGNET MOUNTS
ON DOOR
TRANSMITTER
MOUNTS ON
FRAME
INDICATOR
LIGHTS DURING
TRANSMISSION
OPENING DOOR
MOVES MAGNET
AWAY FROM
TRANSMITTER
OPEN
PRY
OPEN TRANSMITTER
TO ACCESS BATTERIES,
TERMINAL BLOCK, OPTION
JUMPER AND MOUNTING PLATE
RELEASE TAB
TEST/OPERATION
INDICATOR
OPTION
JUMPER
BATTERIES
(TYPE 2032)
PUSH SCREWDRIVER
THROUGH HOLE TO
RELEASE MOUNTING
PLATE
TEST
BUTTON
TERMINAL
BLOCK
1-EXTERNAL
2-COMMON
3-GLASS BREAK
1
2
3
INTERNAL
REED
SWITCH
TERMINALS
DXT-31
TRANSMITTER
MOUNTING
PLATE
ADJUSTABLE
MAGNET
MAGNET
SPACER
MOUNTING
SCREWS
MOUNTING
TAPE