DXS-31: Supervised Universal Door/Window TransmitterThe Model DXS-31 Supervised Universal Door/Window Transmitter is a battery powered stationary transmitter designed for use with Linear’s DXS and DX format receivers and PERS consoles. In PERS installations, depending on programming, the DXS-31 functions to reset the PERS activity timer or trigger an emergency alarm. The transmitter can be triggered by the built-in magnetic switch or an external switch.

The digital DXS code format features over a million possible codes. The DXS transmitters are precoded at the factory to unique codes, so no field coding is required. The DXS-31 can send four different codes: alarm (or activity timer reset), restore, low battery and status.

To reset the PERS activity timer in a PERS installation, as long as the transmitter is triggered before the activity timer expires, an inactivity alarm will be prevented. Using the transmitter’s internal magnetic switch, when the magnet moves more than 1/2″ away from the transmitter, a signal is sent. The magnet can be mounted on a door, drawer, refrigerator door, or any moving object that is used by the subscriber regularly. The DXS-31 transmitter can also be triggered using external contacts wired to the terminal block. The external input can be activated by subscriber activity with a pushbutton, pressure mat switch, or other device.

Pressing the case sends a test transmission and lights the test indicator. When the transmitter’s case is open, the transmit indicator will light each time the unit sends a signal. The indicator is disabled when the case is closed (except for test transmissions). The indicator will flash during operation and test when the batteries are low.

The transmitter is powered from two 3-Volt #2032 lithium batteries with an expected battery life of up to 3 years.

Every hour, the DXS-31 will send a status transmission to the receiver. The hourly signal updates the receiver to the transmitter’s condition. By monitoring status transmissions, the receiver can determine if a transmitter has a low battery or has been removed from the system. DXS format receivers and PERS consoles can monitor status signals; DX format receivers cannot.

A snap-on transmitter mounting plate is provided for easy installation. The magnet is adjustable with four height positions. A 1/4″-high magnet spacer is also supplied to snap on to the base of the magnet.


  • Alarm, alarm restore, supervisory and low battery transmissions
  • Includes magnet for internal contact
  • Includes mounting shoe
  • External contact terminals
  • DXS format
  • N/O or N/C input loop circuit
  • Powered by 2032 two lithium batteries (included)
  • Optional 2450 lithium batteries can be used for extended life
  • RF frequency: 315 MHz
  • 1.5″ W x 3.3″ H x 0.88″ D
  • Order number: SST00073


Power:Two 3V 2032 lithium batteries (supplied); optional – two 3V 2450 lithium batteries for extended life
Battery Life:Three years (typical) with 2032 batteries; five years with 2450 batteries
Measured Range:1,500 feet, open air, with DVS-2400 control panel
Code Outputs:Alarm, alarm restore, supervisory and low battery
External Input Terminals:Terminals 1, 2 accept N/C contact devices
Terminals 2, 3 accept N/O glass break sensors
Pins 1, 2Glass break operation only
Pins 2, 3For external contact and glass break operation
Pins 3, 4For internal reed switch and glass break operation
Jumper removed:Internal, external, and glass break operation
Operating Frequency:315 MHz
Operating Temperature:32° to 120° F (0° to 49° C)
Dimensions:1.5″ W x 3.3″ H x 0.88″ D (38 x 84 x 22 mm)

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov


Installation Manual

Accessories & Compatible Models

Models compatible with the DXS-31
PERS-4200Personal Emergency Reporting System
PERS-2400BPersonal Emergency Reporting System