Linear 212i Comm/Controller 120-User Door Gard Indoor Keypad

Indoor Access Control Keypad, 120 User Codes, Single-Gang Flush Mount, 12-24V AC/DC, by Linear Door Gard (212i)

A flush-mount indoor keypad that gives up to 120 people their own code and switches your strike, maglock, or opener input.

$129.64$168.99CurbGo Savings: Save $39.35
  • 120 user codes
  • Single-gang flush mount
  • 12-24V AC or DC
  • SPDT relay output
  • Three status LEDs
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Ships to the lower 48 states with tracking.

Why buy from CurbGo

  • Risk-free 30-day returnsUnused, in the original packaging
  • U.S.-based home goods retailerReal U.S.-based support, before and after

Give staff and family their own entry code instead of another copied key

At a Glance

  • 120 user codes: each person gets a personal PIN you can add or delete at the keypad
  • Single-gang mount: fits a standard electrical back box flush on an interior wall
  • 12-24V AC or DC: auto-sensing input runs from a low-voltage access control supply
  • 1 relay + 3 outputs: one SPDT relay and three 50 mA negative voltage outputs
  • Indoor use only: made for lobbies, back rooms, and interior doors

Keys get copied, lost, and handed to people who left months ago. The Linear 212i Door Gard keypad replaces them with up to 120 personal entry codes that you add or remove right at the keypad. It mounts flush in a standard single-gang box, runs on 12 to 24 volts AC or DC, and switches an electric strike, maglock, or gate operator input through its built-in relay. Three status LEDs confirm each entry. It is a wired component for an installer, sized for one indoor door with light to moderate traffic.

Key Features

  • 120 personal codes: assign each user a PIN and delete a single code without re-keying anyone else.
  • Built-in SPDT relay: one dry-contact relay switches a door strike, maglock, or opener input when a valid code is entered.
  • Three 50 mA outputs: negative voltage outputs can drive a sounder, shunt an alarm zone, or trigger a second device.
  • Expandable with the 293 board: the optional 293 relay module converts the three outputs into extra SPDT relays.
  • Auto-sensing power: accepts 12 to 24 volts, AC or DC, so it works with common access control supplies.
  • Status at a glance: three LEDs show operating status and confirm when a PIN is accepted.

What's Included

In the box: the 212i keypad, a 10-conductor wire harness, a 4-conductor wire harness, two slotted screws, two security screws, a transorb diode, and the features and programming guide.

Before You Buy

  • This is a wired keypad, not a standalone lock. It needs a separate 12-24V AC or DC power supply plus a lock device to control, such as an electric strike, maglock, or a gate or garage operator input. Plan on professional installation.
  • Indoor use only. Mount it on an interior wall or inside a vestibule. For an exposed gate post or exterior door, choose a weather-rated keypad instead.
  • It does not open anything by radio. The keypad switches a relay over wires; it does not pair with handheld remotes or receivers.

Perfect For

  • Interior office, stockroom, or server closet doors
  • Small businesses retiring a pile of metal keys
  • Apartment lobby or vestibule entry
  • Installers adding code entry to an existing strike or maglock
  • Garage or shop interior man doors

Care & Use

  • Have a qualified low-voltage or access control installer wire and program the keypad.
  • Change the master code from the factory default during setup and record it somewhere secure.
  • Wipe the face with a dry or lightly damp cloth; no sprays or solvents.
  • Delete a user's code as soon as that person no longer needs access.

Shipping

Your order is packed with care and tracked door to door. Ships fast from CurbGo with tracking.

Why installers reach for the 212i

Codes instead of copies

Up to 120 people each get their own PIN. When someone leaves, delete that one code at the keypad and everyone else keeps working, with no locksmith visit and no re-keying of the door.

Drops into a standard box

The single-gang design fits an ordinary electrical back box, so it mounts flush and clean on an interior wall without a bulky surface housing or custom cutting into the finished drywall.

Room to grow

Beyond the main relay, three low-current outputs can shunt an alarm or drive a sounder, and the optional 293 board turns them into extra relays when a second door function is needed.

The 212i by the numbers

Built for one interior door and a busy roster.

120 Individual user codes
12-24V AC or DC, auto sensing
94 mA Maximum draw before add-on relays

Is a code keypad better than keys?

vs. a keyed lock

Keys can be copied and never come back. A code is deleted in seconds, so former staff or tenants lose access the same day.

vs. a battery keypad deadbolt

A battery deadbolt is self-contained but limited. The 212i is hardwired, never needs fresh batteries, and can switch strikes, maglocks, or opener inputs.

vs. a card reader system

Card systems need cards, readers, and a controller. The 212i holds codes on board, so there is nothing to hand out and nothing to lose.

Fits a standard wall box

A compact single-gang faceplate that sits flush beside the door.

Faceplate
2.75 in W x 4.5 in H
Depth
1.3 in (1.68 in with the 293 relay module)
Back box
Standard single-gang electrical box
  • Sized like a light switch plate, so it lines up neatly with switches beside an interior door.
  • Leave extra box depth if you plan to add the 293 relay module later.

Full Specifications

Every detail, measured and listed

ModelLinear 212i Door Gard indoor keypad
Users120 codes
MountingSingle-gang flush mount, standard electrical back box
Power12-24 VAC or VDC, auto sensing
Current draw94 mA maximum (add 30 mA per relay with 293 module)
Relay1 SPDT
OutputsThree 50 mA negative voltage outputs
ExpansionOptional 293 relay board
Functionality modes212, 232
Operating temperature-20 to 130 F
EnvironmentIndoor use only
Dimensions2.75 in W x 4.5 in H x 1.3 in D (1.68 in D with 293 module)
MPN0-211111

FAQs

Common questions that customers ask

Does the Linear 212i need a separate power supply?

Yes. It runs on 12 to 24 volts AC or DC from a low-voltage supply wired to the keypad. It does not plug into an outlet or run on batteries.

Can the 212i be mounted outside?

No. The 212i is for indoor use only. Mount it on an interior wall or inside a sheltered vestibule.

What can the 212i control?

Its SPDT relay switches an electric strike, magnetic lock, or the open input on a gate or garage operator. The three outputs can drive a sounder or shunt an alarm zone.

How many entry codes does it hold?

Up to 120 user codes, each added or deleted at the keypad using the master code.

How fast will it ship and can I return it?

Orders ship to the 48 contiguous states and process within 2 business days. If it is not right, you have 30 days from delivery to return unused items in the original packaging.

Secure every entry

CurbGo hunts for the parts the pros actually install and skips the markup. Linear has built access control and gate entry hardware in the U.S. market for decades, and its Door Gard keypads are a familiar sight on office and apartment doors. The 212i is the compact indoor model that gets a single door off metal keys.

Retire the key ring

Fast shipping. 30-day returns. Up to 120 codes on one indoor keypad.