Linear 212I 12-button keypad access device

Indoor flush-mount keypad

The Linear 212I is a twelve-button access keypad designed for indoor flush mounting. It accepts twelve to twenty-four volts AC or DC with auto-adjusting input and provides a single-pole double-throw relay rated at five amps. The unit stores up to 120 user codes and operates between twenty and 130 degrees Fahrenheit.

Replaces standalone code entry units

This device upgrades installations that rely on simple push-button switches or key-operated locks by adding programmable codes and a relay output. The jump is worth it when you need audit-capable access control without a separate controller or when the existing hardware lacks the 120-code capacity.

Fits standard single-gang boxes

Installation uses a stainless-steel single-gang plate with plastic buttons that matches common wall boxes. The SPDT relay wiring follows typical access-control conventions, so miswiring the common, normally-open or normally-closed terminals is the most frequent error.