Linear AP-4 Single-Portal Access Controller

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  • Usually Ships 4 to 7 Business Days

The Model AP-4 Single-Portal Access Controller is designed for a broad range of access control applications. Its wireless design and small size make it easily adaptable for a variety of access control requirements. Typically, the AP-4 is used to control a door strike, barrier gate, automatic gate or automatic door operator.

The AP-4 contains a high-gain UHF receiver which uses an external antenna to pick up signals from up to 250 feet away. Up to 480 Linear MegaCode® transmitters and one Model MGT safety edge transmitter can be programmed into the AP-4’s memory. The AP-4 will retain its memory, even without power.

Two dry contact relay outputs are provided. One relay is the ACCESS RELAY (K1), which triggers for two seconds each time a programmed transmitter is activated. This relay output connects to the pushbutton or radio input of the access device. The second relay is the OBSTACLE RELAY (K2), which triggers for two seconds when an obstacle signal is sent from a Model MGT safety edge transmitter. This relay output connects to the obstacle input of the access device. An OPEN REQUEST input terminal is supplied for hardwired activation of the access device with an external pushbutton or keyswitch. The AP-4 can be powered from 12-24 Volts AC or DC. The Form C relay outputs can switch up to 1 Amp each. An EARTH GROUND terminal is provided as an optional connection for maximum lightning and static protection.

Three utility functions can be displayed by pressing the pound (#) key then the digits 1-3. The utility functions display the status of the obstacle transmitter (#1), the total number of transmitters programmed (#2), and the total number of transmitter ID blocks programmed (#3).

The AP-4 can fully supervise a Model MGT safety edge transmitter. The system monitors the MGT transmitter for hourly status reports, tamper signals, and low battery signals. A beep will sound every 5 seconds if a fault occurs and the trouble source can be displayed by pressing pound one (#1). A transmitter must be activated twice to trigger the ACCESS RELAY if a supervisory trouble condition exists on the MGT transmitter (unless the MGT has been suspended). To clear the supervisory trouble after servicing, press the CANCEL button.


  • Ideal for gated communities, parking facilities, and industrial sites

  • Easy to set-up and use, up to 480 remotes can be programmed with a few keystrokes

  • Easy to add, suspend, and delete transmitters through programming mode, no transmitter dip switches to set

  • Supports 480 block coded transmitters or 238 individual transmitters/wireless keypad entry codes

  • Supports one fully supervised safety edge transmitter

  • RF frequency: 318 MHz

  • 4.45″ W x 5.75″ H x 1.5″ D (without antenna)

  • Order number: ACP00894