Control unit for 2 readers

  • This processing unit can handle 2 one-way entry points or one both way one and as such is universally usable when designing and building small access systems and large ones as well
  • Two EDK2 readers or one WIEGAND protocol reader can be connected to this unit
  • Output relays control the doorlocks or turnstiles directly, while the inputs allow monitoring and signaling of door status
  • Any configuration happens from the computer
  • Access rights are defined by time windows, providing for limitless access rights assignment possibilities.
Product Code Description
AL20 Control Unit for 2 readers (EDK2, EDK3) or 1 WIEGAND
RS232/RS485 communication
AL20-TCP Control Unit for 2 readers, ETHERNET interface


When making the order, it is not necessary to differentiate the reader connection.

The selection of connected reader is made at the point of installation by a switch.


  • Port for connection of up to 2 readers
  • Diagnostic LED diodes
  • Possibility to connect           
    PIN readers
  • Anti-pass-back function
  • 2 relays for doorlock control
  • Inputs for door contacts
  • Inputs for exit buttons
  • Programmable PGM output
  • Outputs for EZS control
  • Tamper contact against case opening
  • OFF-LINE event log

AL20 - datasheet in PDF format


Contact Us

ESTELAR s. r. o.
Palackého 744/1
769 01 Holešov 
Czech Republic

Phone: +420 573 394 894
Fax.: +420 573 395 467
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