AL20 control unit

The autonomous control unit is for the operation of two one-sided or one two-sided entrances. The unit is derived from the AL40 module and is used in simpler applications. The electronics itself is placed within a plastic case for indoor and outdoor use. The case is equipped with a tamper contact against opening and the unit is installed into a hidden place. The AL20 is connected to scanners EDK2, EDK2B or any scanner with Wiegand output. AL20 has the same functionality as the AL40 and therefore it can be programmed according to the approached identification and full access rights can be set for each entry.


Two EDK2 scanners or one Wiegand scanner can be connected to AL20. For each scanner, access right and conditions for the switching on of output relays controlling electromagnetic door locks, turnstiles, etc. can be defined independently. When an ID medium is approached, the access right of the passing person is assessed. If the passing person is authorized to enter, the relay will switch on and open the door. Operation statuses (granting or denial of entry) are signalled by optical and sound elements within the scanners. AL20 is also equipped with two inputs for door contacts and can therefore monitor current door status and initiate alarm when the door is opened violently or not closed after passage of an authorized person. Information on passages and door status is saved in the internal backup memory and then transferred onto a computer for further processing. All operation characteristics can be set directly from the computer.


  • in access system as a basic unit for entry control
  • control of entries to a building with automatic external security system control
  • can operate without a permanent connection to a PC from a distant workplace


  • control of one or two doors
  • works with multiple scanner types
  • diagnostic LED
  • FLASH memory 64 kB
  • backup memory RAM 256 kB
  • internal real time circuit
  • 2x independent outputs
  • 1x door contact input
  • 1x departure button
  • programmable PGM output
  • tamper contact against case opening
  • upgrade firmware of application
  • port for TCP/IP module

port for connection to external security system

Technical data

  • ID medium: depending on connected scanners – Dallas chips, contactless cards Emmarin, HID, Mifare, Motorola
  • Number of time spaces: 500 with weekdays distinction
  • Number of users: 2 500 active cards according to configuration, rights can be set for individual subsystems and each card
  • Event memory: 10 000 entries of passage history


Řídící jednotka AL20


We specialise in the development and sale of information systems for HR departments. With your products, the HR manager gains a high ...



Please send user inquiries for individual systems to the customer support centre. 



Our e-shop offers a selection of components for attendance and access systems and special offers for complex attendance systems.  ...


Services / Outsourcing

We perform complex delivery of our systems including analysis, installation, implementation and user training. 



RON Software, spol. s r.o., Rudé armády 2001, 733 01 Karviná-Hranice / tel.: +420 595 538 200  / e-mail: / GPS: N 49.871959, E 18.54887