Alarm.com’s Smarter Access Control is an ideal solution for businesses ranging from small shops to large commercial properties.

The Two Reader Expansion Module is designed to add two extra readers to an Alarm.com Mercury Series door controller. Each

ADC-AC-MR52 adds two reader ports, six relay outputs, and eight programmable inputs to the system. Connect the expansion

module to the controller using a shielded, RS-485 twisted pair.

For larger commercial installations, Single and Two Reader Expansion Modules can be daisy-chained together.

• Provides all I/O needed for two doors each using one reader

• Eight programmable inputs

• Two reader inputs

• Six relay outputs

• For use with Alarm.com Mercury Series Door Controllers

• Scan-to-add card format and serial detection

• Control doors and manage users from the Alarm.com app

• Integrated Alarm.com intrusion and video offerings

• User-friendly, flexible scheduling

• Configure hardware using web or app for easy installation

• Plug & play installation — no networking expertise required