Skip to main content
Knowledge Base

Two Reader Expansion Module (ADC-ACX2) - Data Sheet

Alarm.com’s Smarter Access Control is an ideal solution for any small or medium-sized business. The Two Reader Expansion Module is designed to add two extra readers to an Alarm.com Door Controller. Each ADC-ACX2 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.
 

Two Reader Expansion Module.png

Features

  • 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 Door Controllers

Smarter Access Control benefits

  • Scan-to-add card format and serial detection
  • Control doors and manage users from the Alarm.com 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

Specifications

Input Power

12/24V DC, 550mA max, 450mA nominal @ 12V

270mA nominal @ 24V

Output Power 12V DC, 125mA per reader
Communication 2-Wire RS-485
Inputs

Two dedicated reader inputs

Eight programmable inputs

One dedicated tamper input

One dedicated power monitor input

Outputs

Six relay outputs (5A @ 28V DC)

Single-wire LED control

Single-wire buzzer output

Certifications

UL 294 recognized

CE compliant

ROHS

Dimensions 6.0 x 8.0 x 1.0” (152 x 203 x 25 mm)
Temperature

-40 – 167°F (-40 – 75°C) operational

-67 – 185°F (-55 – 85°C) storage

Operating Humidity  0-95% (non-condensing) RH

 Mercury_Authentic.jpg

Developed with the Authentic Mercury open hardware platform

 

Interested in Alarm.com?

Alarm.com technology is sold, installed, and serviced by licensed service providers near you.

 

Let's Get Started