DoorBird 423872028 A1121 Surfa...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$806.60
DoorBird 423872028 A1121 Surface Mount IP Access Control Device with Keypad, RFID Reader, and Wiegand Interface

DoorBird 423872028 A1121 Surface Mount IP Access Control Device with Keypad, RFID Reader, and Wiegand Interface

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Model: 423872028
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DoorBird A1121 Surface Mount IP Access Control Device with Keypad, RFID Reader, and Wiegand Interface

The DoorBird A1121 is a compact, IP-based multi-technology access control system that installs as a stand-alone solution for areas where a full IP video door station isn't possible, such as back and side doors, garages, underground garages, storage rooms, or bicycle and machine rooms. It combines an illuminated keypad, a 125kHz and 13.56 MHz RFID reader, and Bluetooth low energy (BLE) into a single surface-mounted unit with a solid 3 mm (0.12 in) brushed stainless steel V2A front panel. The device connects via Wi-Fi or LAN cable with PoE capability (802.3af Mode-A), and continues local network operation even if internet connectivity is temporarily lost.

Key Features

  • Compact Dimensions: 128 x 62 x 28 mm (H x W x D) / 5.04 x 2.44 x 1.1 in (H x W x D), designed for easy installation on a door frame.
  • Robust Front Panel: Solid 3 mm (0.12 in) brushed stainless steel V2A construction with backlit buttons for use in unlit environments.
  • Flexible Power Options: Operates on 15 V DC (max. 15 W) or Power over Ethernet (PoE 802.3af Mode-A), eliminating the need for a separate power supply where PoE is available.
  • Triple Access Technology: Combines keypad entry, 125 KHz and 13.56 MHz RFID reader, and Bluetooth low energy (BLE) into one surface-mount device.
  • App-Configurable Access: Supports up to 500 individual pin codes and configurable individual events, including relay triggers and HTTP(s) requests, ideal for one-time or temporary visitor codes.
  • Wiegand Interface & Dual Relays: Includes a Wiegand interface and 2 freely configurable bistable switching relays for integration with elevators and other access-controlled equipment.
  • Tamper Sensor: Built-in manipulation sensor helps detect unauthorized tampering attempts.
  • Wi-Fi/LAN Connectivity: Connects via WLAN or LAN cable, maintaining local network functionality even during internet outages.
  • Weatherproof Design: Rated for indoor and outdoor installation with operating conditions from -25 to +55°C / -13 to 131°F and 10 to 85% RH (non-condensing).

Technical Specifications

  • Front panel: 3 mm (0.12 in)
  • Mounting housing (backbox): Polycarbonate
  • Mounting type: Surface-mounted. Flush-mounted and retrofit version sold separately
  • Power supply: 15 V DC (max. 15 W) or power over Ethernet (PoE 802.3af Mode-A)
  • Weight: 250 g
  • Dimensions: 128 x 62 x 28 mm (H x W x D) 5.04 x 2.44 x 1.1 in (H x W x D)
  • Operating conditions: -25 to +55°C / -13 to 131°F humidity 10 to 85 % RH (non-condensing)

Typical Applications

  • Commercial Office Buildings
  • Multi-Tenant Residential Properties
  • Underground and Surface Parking Garages
  • Storage and Packing Rooms
  • Bicycle and Machine Rooms
  • Elevator Access Control Points
  • Industrial and Warehouse Facilities

Why DoorBird A1121?

The DoorBird A1121 delivers professional-grade access control with a solid 3 mm brushed stainless steel V2A front panel built to withstand demanding indoor and outdoor environments, from -25 to +55°C. With three combined access technologies, a Wiegand interface, dual configurable relays, and a built-in tamper sensor, it's engineered for reliable, flexible security integration at doors, garages, and equipment rooms where a full video door station isn't practical.

Product Specs

Catergory:
Access Control
Subcategory:
Access Control System
Product Group:
Electronic Access Controls
Product Subgroup:
Intercoms
Product Type:
Access Control Device
Series:
A1121
Power Supply:
15 - 48 V DC
Weather-proof:
Yes
Range:
0 - 3 cm, depends on environment
Front Panel:
3 mm (0.12 in)
WiFi:
2.4 GHz b/g/
Product Dimension:
5.04 x 2.44 x 1.1 in (H x W x D)
Mounting Method:
Surface Mounted, Flush Mounted and Retrofit version sold separately
Department:
Door Hardware

DoorBird 423872028 – Frequently Asked Questions

1) Can I use the DoorBird A1121 access control unit at a side door or garage where I can't run a full video door station?
That's exactly the job the A1121 is built for. It's a stand-alone IP access control unit for back and side doors, garages and underground garages, storage rooms, bike rooms and machine rooms, plus elevator access points and warehouse facilities. Entry is by keypad, RFID card or fob, or Bluetooth low energy, so a tenant or crew gets in without a camera station or an answering point being involved. It runs on your local network, and it keeps working on the LAN even when internet service drops.
2) Does the DoorBird A1121 mount on the surface or into the wall?
Surface mount. The A1121 fastens to the face of the frame or wall with a polycarbonate mounting backbox behind it, so there's no cutting a pocket into masonry or into a hollow metal frame. Flush mount and retrofit versions of the device are separate products, so if the spec on the drawing calls for a recessed unit, that's a different part number, not an accessory for this one.
3) How do I power a DoorBird A1121, and can it run on PoE?
Two options. Pull a Cat cable and power it over Ethernet (802.3af Mode-A), which gets you data and power on one run and no separate supply at the door. Or feed it DC: the spec range is 15 to 48 V DC, with the device drawing a maximum of 15 W. For a garage or bike room where you're already running network, PoE is usually the shorter install. Note that if you plan to use Wi-Fi instead of a LAN cable, you still have to bring DC power to the unit.
4) Can the DoorBird A1121 be installed outdoors in a cold climate?
Yes, it's rated for indoor and outdoor installation, with an operating range of -25 to +55 C (-13 to 131 F) and 10 to 85% relative humidity, non-condensing. The front is solid 3 mm (0.12 in) brushed stainless steel V2A, which is what takes the weather and the abuse at an exterior garage or service door. Backlit buttons handle unlit entrances.
5) Can I tie the DoorBird A1121 into an existing access control panel?
It has a Wiegand interface, which is the standard reader-to-panel wiring on most commercial access systems, so the A1121 can feed credentials to a head-end panel rather than acting alone. It also carries two freely configurable bistable switching relays of its own, which is how it drives a strike, a gate operator, or elevator equipment directly. You can use it either way: as a reader into a panel, or as a self-contained controller with its own relay outputs.
6) How many PIN codes can the DoorBird A1121 hold, and can I issue a temporary code to a contractor?
Up to 500 individual PIN codes, managed from the app. Events are configurable per code, including relay triggers and HTTP(s) requests, so one-time or time-limited visitor and contractor codes are the intended use rather than a workaround. For a property manager running a multi-tenant building, that's enough for a unit-per-code assignment on a mid-size property plus service codes on top.
7) What kind of RFID cards work with the DoorBird A1121, and how close do they have to be?
The reader handles both 125 kHz and 13.56 MHz credentials, so it covers the older low-frequency prox fobs and the newer high-frequency cards in one device. Read range is 0 to 3 cm depending on the environment, meaning it's a present-the-card reader, not a walk-past one. Metal surfaces and nearby electronics can shorten that range, so on a steel frame keep the credential right on the face of the unit.
8) Does the DoorBird A1121 need a hardwired network drop, or will Wi-Fi do?
Wi-Fi works, on 2.4 GHz b/g. That band is the practical one for a garage or a basement machine room because it carries further through concrete than 5 GHz. That said, a LAN cable is worth pulling anyway: it's the only way to power the unit over PoE, and it removes signal coverage from the list of things that can strand people outside a door.
9) What stops someone from prying the DoorBird A1121 off the wall to get in?
There's a built-in manipulation sensor that detects tampering attempts, and the front is solid 3 mm brushed stainless steel V2A rather than a plastic or thin-gauge face. That combination is why the unit is specified for exposed locations like parking garages and exterior service doors where nobody is watching the entrance.
10) Can one DoorBird A1121 control two doors, or a door and a gate?
The two relays are freely configurable and bistable, so the unit can operate two separate pieces of equipment, for example a pedestrian door strike and a garage gate operator, or a door and an elevator call. Bistable means a relay holds its state until switched again rather than pulsing, which is what you want for something like unlocking a door for a delivery window instead of a momentary release.
11) What is the part number for the DoorBird A1121 access control device?
The A1121 surface mount unit is DoorBird 423872028, a single-configuration product with one model. There are no finish or size options to pick, so the ordering decision is only whether you want surface mount (this one) or the flush mount or retrofit versions, which are separate devices.
How fast can I get the DoorBird 423872028 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the continental U.S. Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit, reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the DoorBird 423872028 come with a warranty?
Absolutely. The DoorBird 423872028 is backed by a manufacturer’s warranty. For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the DoorBird 423872028?
You can call, text, or email our expert support team for fast answers. We’re here to help with product selection, installation tips, and troubleshooting. Contact Us
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