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ADC-SEM300-VT-VZ-M - Alarm.com SEM Dual-Path Ethernet/Cellular Verizon LTE-M Alarm Communicator (for Honeywell VISTA Panels)

ADC-SEM300-VT-VZ-M - Alarm.com SEM Dual-Path Ethernet/Cellular Verizon LTE-M Alarm Communicator (for Honeywell VISTA Panels)
ADC-SEM300-VT-VZ-M - Alarm.com SEM Dual-Path Ethernet/Cellular Verizon LTE-M Alarm Communicator (for Honeywell VISTA Panels)
Item# ADC-SEM300-VT-VZ-M
List Price: $250.13
Your Price: $166.75
Add the Ethernet Dongle (ADC-200M-EV-E-DONG)*: 
Availability: In Stock
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Alarm.com ADC-SEM300-VT-VZ-M Product Description:


The Alarm.com ADC-SEM300-VT-VZ-M is a dual-path system enhancement module (SEM) designed to migrate compatible Honeywell/Ademco VISTA-10P, VISTA-15P, VISTA-20P and VISTA-21iP panels to Alarm.com's award-winning interactive services. The ADC-SEM300-VT-VZ dual-path SEM supports the Verizon 4G LTE-M cellular network and optional broadband ethernet. The multiple paths ensures the longest life cycle with the most secure and reliable service. The SEM is now ETL certified, ensuring a high benchmark of safety and sustainability.

The SEM300 enable wireless reporting of alarms and other system events using the LTE-M wireless (cellular) network and Broadband Ethernet. With the SEM300 you can configure and support installations from any browser or smartphone using Alarm.com's familiar and easy-to-use web and mobile support tools, including the Partner Portal and MobileTech app. And, enable Alarm.com interactive monitoring and alerting for end-users. Lastly, you can integrate Alarm.com's home automation and energy management services with the SEM's built-in Z-Wave Plus capabilities.

For remote programming to be available, the panel must support the downloader feature. This feature is available on most panels with a minimum of v5.2. The SEM300 is compatible with Honeywell/ADEMCO panels and the equivalents, dating back to 2005. The Honeywell/ADEMCO VISTA-21iP is also compatible when the Internal IP/GSM jumper switch is set to the OFF position.

Product Features:

  • Fast, reliable, and secure wireless signaling
  • Cellular 4G Verizon LTE-M primary communication path
  • Broadband as an optional secondary communication path
  • Remote monitoring and control using the website and app
  • Remote panel configurations with Uploader/Downloader, including Add Sensors
  • Remote access and management of locally saved user codes
  • Home automation and energy management
  • Support for Z-Wave Plus devices
  • Video monitoring
  • Cover and wall tamper included
  • Externally facing LEDs for visual feedback
  • Internal Antennas
  • No separate power supply needed
  • Over the air (OTA) upgrades
  • CID and SIA central station signaling
  • Enable Alarm.com interactive monitoring and alerting for end users
  • ETL Listed to UL985, UL1023 and ULC S545
  • Configure and support installations from any browser or smartphone using Alarm.com's familiar and easy-to-use web and mobile support tools, including the Partner Portal and MobileTech


Note: The Cat-M variant only requires the primary antenna. Cat-M uses the 4G LTE Cat-M1 network, no fallback.

Alarm.com ADC-SEM300-VT-VZ-M Product Specifications:


  • Enclosure Dimensions (L x W x D): 7.66 x 4.35 x 1.65 in. (19.46 x 11.05 x 4.19 cm)
  • Enclosure Color: White
  • Case Material: Fire-retardant PC/ABS, PC
  • Compatibile: Honeywell/Ademco VISTA 10P, 15P, 20P and 21iP panels (manufactured 2005 or later and version 3.1+)
  • Not Compatible: POTS. The SEM should be the only communication path for alarm signaling to the GeoArm monitoring station.
  • Power Requirements: 12 V nominal, 125 mA nominal (continuous), 230 mA max
  • Cellular Network: Verizon 4G LTE with 3G HSPA, 2G GSM fallback
  • Panel Interfaces: Two keypad BUS connections, 12 V power and ground
  • Enclosure Interfaces: Five LEDs (red, green, yellow, or blue)
  • Alarm.com Module Indicators: One module/panel communication status LED, one module power LED, one automation LED, three wireless communication status LEDs
  • SEM Circuit Board Indicators: One LAN LED, one processor LED, one COMM fail LED
  • Z-Wave Frequency: 908.4 MHz
  • Operation temperature: 14° - 131° F (-10°C - 55°C)
  • Storage temperature: -30° - 140° F (-34°C - 60°C)
  • Humidity: 90% relative humidity, non-condensing

Alarm.com ADC-SEM300-VT-VZ-M Recommended Tools:


  • Screwdrivers: Small blade and Phillips
  • Drill and bits for screws and/or wall anchors
  • Ethernet cable
  • Alpha keypad (not required) - Alarm.com strongly recommends installing an alpha keypad to ensure the failure to communicate (FTC) trouble condition is displayed to the user.
  • Four-conductor, 22 AWG or larger stranded wire (Maximum wire length of 40 feet)

Alarm.com ADC-SEM300-VT-VZ-M Product Compatibility:


  • Honeywell/ADEMCO VISTA-10P
  • Honeywell/ADEMCO VISTA-WA10P
  • Honeywell/ADEMCO VISTA-10PSIA
  • First Alert FA130CP
  • First Alert FA130CPSIA
  • Honeywell/ADEMCO VISTA-15P
  • Honeywell/ADEMCO VISTA-WA15P
  • Honeywell/ADEMCO VISTA-15PSIA
  • First Alert FA148CP
  • First Alert FA148CPSIA
  • Honeywell/ADEMCO VISTA-20P
  • Honeywell/ADEMCO VISTA-WA20P
  • Honeywell/ADEMCO VISTA-20PSIA
  • First Alert FA168CPS
  • First Alert FA168CPSSIA
  • Honeywell/ADEMCO VISTA-21iP (Important: The SEM300 is compatible with the VISTA-21iP, if the Internal IP/GSM Jumper is set in the OFF position. Verify the SEM is powered down before setting the jumper to OFF.)
Q & A's :

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