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ABB-Welcome Video Outdoor Station, 1/2 Pushbutton


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WARNING: Cancer and Reproductive Harm –


Pre-Assembled Outdoor Station for ABB Door Entry Systems

The ABB Video Outdoor Station with 1/2 Pushbutton is a pre-assembled custom outdoor station for the ABB Door Entry System, facilitating quicker installation for common applications. The two-module station includes the Audio Module with 1/2 Pushbutton (M251022A-A) and the Camera Module (M251021C), as well as the required 2-module Aluminum Faceplate (51022CF-A). This configuration allows a visitor to initiate a call with an indoor station/residence by pressing the pushbutton and to then talk with the resident, while the resident can view visitors through the camera from a video indoor station.

  • Includes faceplate and 2 modules: Audio with Pushbutton, Camera
  • Provides two-way communication with indoor stations
  • Built-in speaker, microphone, and two door lock terminals
  • Activated by indoor station or built-in pushbutton
  • Live video feed viewable on video indoor station(s)
  • Installs into a 2-module ABB Flush Mounted Box

Audio Module Features

With a built-in speaker and microphone hidden behind a solid aluminum face (no speaker holes), the Audio Module provides two-way communication with indoor stations and can optionally trigger an output in your ABB Door Entry System. Communication can be established either by the resident at an indoor station, or by the visitor upon pressing the built-in pushbutton.

  • Pushbutton serves as a single button or two-button rocker
  • Adjustable lock release time and speaker volume
  • Integrated optic sensor for day/night mode

Because the built-in button can be programmed for use either as a single button or as a two-button rocker, it can be customized for various applications. Used as a two-button rocker, the left side could be used, for example, to initiate a call with an indoor station or guard unit, while the right side could be used either to switch on a connected light or to initiate a call with a different station/residence.

When a visitor presses a pushbutton to initiate a call to an indoor station, one of the Audio Module's three status LEDs indicates whether the call is successfully made or the system is busy. If the call is successful, the call LED illuminates. A second LED illuminates when communication is possible, and the third LED illuminates if the resident has remotely unlocked a connected door for the visitor to enter. The button(s) also provide an adjustable feedback ringtone.

The module allows you to connect an electric lock for remote door unlocking. No independent power supply is needed for the lock. A second terminal for a second lock is also available. The lock release time is adjustable for security.

Camera Module Features

The live video feed from this wide-angle camera can be viewed anytime through a video indoor station (sold separately). Built-in IR lighting ensures you can see clear images even at night, and a built-in heater prevents fog from covering the lens and obscuring your view. Furthermore, the camera's scratch-resistant and fire-resistant finish helps prevent vandalism.

  • Wide-angle camera with manual view adjustment
  • Built-in IR lighting provides clear night vision
  • Temporarily disable lighting for discreet surveillance
  • Supports either PAL or NTSC video signals

Installation Details

The ABB Video Outdoor Station connects to the System Controller (sold separately) using two wires, and installs into a 2-gang ABB Flush Mounted Box (model 41022F, sold separately). After the modules are wired into the Door Entry System, they simply snap into the box, and the included faceplate snaps over them onto the box. The box can be flush- or surface-mounted with accessories.


  • Audio Module with 1/2 Pushbutton (M251022A-A)
  • Camera Module (M251021C)
  • Aluminum Faceplate, 2-Gang (51022CF-A)
  • Installation Tool

Please note, in order to distribute video to multiple video indoor stations, a Video Distributor is required (model M2304, sold separately).

NOTE: Requires 2-wire connection to a System Controller, sold separately. Also requires use with a video indoor station, sold separately. Installation hardware not included.

About the ABB Door Entry System

Also known as the "Welcome" system, the Door Entry System is a first-of-its-kind modular intercom and access control system that offers one flexible solution for any intercom and entry security application. Customizable, nearly endlessly scalable, and easy to install, the system is perfect for any building, from a small single-family home to a huge residential complex.

System Features:

  • Complete intercom and access control solution for any building
  • One system supports up to 60 buildings and 250 stations per building
  • Connections require only 2 wires for ultra-flexible installations
  • Standard range up to 1,968 feet (600 m), extends with power boosters
  • Free mobile apps for iOS and Android provide remote intercom access
  • No fees required to enable Internet connection – ABB provides servers

Station Features:

  • Modular outdoor stations allow easy customization and repairs
  • Pre-assembled outdoor stations facilitate quick installation for standard applications
  • Optionally install ABB indoor stations and/or use mobile devices as indoor stations
  • Indoor stations optionally support door strike release for remote unlocking
  • Optionally select indoor stations with built-in induction loops for hearing aid users

How to Build Your System

Every ABB Door Entry System needs at least two components: a System Controller (either standard or mini) and an Audio Module (any variation). With these two foundational components, the system can be expanded and customized as needed. Additional system components may include:

  • Custom Modular Outdoor Stations
    • Audio Module (speaker/mic, with or without pushbuttons)
    • Pushbutton Module (with or without built-in card reader)
    • Keypad Module (with or without built-in card reader)
    • Display Module with Built-In Card Reader
    • Camera Module
    • Nameplate Module
  • Pre-Assembled Outdoor Stations
  • Hands-Free Indoor Stations (with or without video screen and/or induction loop)
  • Handset Indoor Stations (with or without video screen and/or induction loop)
  • Guard Unit (specialized station for security monitoring)
  • Mobile Devices (requires Telephone Gateway and/or IP Gateway)
  • Telephone Gateway (for integrating mobile or landline phones)
  • IP Gateway (for enabling remote Internet access)
  • Switch Actuator (for relay control)
  • Camera Interface (for connecting third-party analog cameras)
  • Elevator Lift Control Relay Module (for elevator/floor access control)

Other accessories are also available for installation and connection. Most notably, in order to build a custom modular outdoor station, you will need to select the modules you wish to include in the station, and then match the number of modules to the appropriate size Flush-Mounted Box and Faceplate. (Flush-mounted boxes support optional surface-mounting in addition to flush-mounting. When surface-mounting, a Rain Hood is also required; only optional when surface-mounting.) The screwless, snap-on design of both outdoor and indoor stations makes installation a breeze.

Easy Planning with ABB Configurator

ABB: Power & Productivity for a Better World

ABB (ASEA Brown Boveri), officially branded the ABB Group, is one of the most expansive engineering corporations in the world. From its hometown in Zurich, Switzerland, this Swedish-Swiss power and automation manufacturer spans across ~100 countries, bringing its technology to every corner of the globe. With history harking back to the 1880's, ABB is a renowned behemoth of cutting-edge development. Create a better world in your own corner of the world with products by ABB.


Product Features

  • Video camera with large detection angle (H 86°, V 67°, D 104°)
  • Manual mechanical adjustment (H ± 15°, V ± 15°)
  • Optional to connect 1 additional output inside the video indoor station
  • 1 output for door opener without the need of additional power supply
  • 1 output for floating output, door opener (30V AC/DC 1A)
  • 1 input for door status check
  • 1 input for exit pushbutton

Technical Details

  • Manufacturer Part #: M21351P1-A
  • Dimensions: 7.91 x 4.92 x 1.93 inches
  • Warranty: 2 Years

Audio Module with 1/2 Pushbutton (M251022A-A)

  • Operating Temperature: -40° to 158°F (-40° to 70°C)
  • Protection: Waterproof: IP54; Vandal-proof: IK 07
  • Power Supply: Door opener (Lock-GND): 18 V 4 A impulsive, 250 mA holding
  • Floating Output: Door opener (COM-NC-NO): 30 V AC/DC, 1A
  • Single-Wire Clamps: 2 x 0.28 mm2 – 2 x 1 mm2
  • Fine-Wire Clamps: 2 x 0.28 mm2 – 2 x 1 mm2
  • Bus Voltage: 20-30VDC
  • Dimensions: 2.83 x 3.82 x 0.98 inches

Camera Module (M251021C)

  • Operating Temperature: -40° to 158°F (-40° to 70°C)
  • Protection: Waterproof: IP54; Vandal-proof: IK 07
  • Bus Voltage: 20-30VDC
  • Dimensions: 2.83 x 3.82 x 1.61 inches

Aluminum Faceplate, 2-Gang (51022CF-A)

  • Material: Aluminum
  • Size: 1/2
  • Dimensions: 7.91 x 4.92 x 0.75 inches

System Capacity

  • 9 Guard Units per System
  • 60 Buildings per System
  • 250 Indoor Stations per Building
  • 9 Outdoor Stations per Building (including gate and other outdoor stations)
  • 2 Locks per Outdoor Station