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MR52 Two Reader Expansion Module
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$524.99
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The MR52 Two Reader Expansion Module (Replaces ADC-ACX2) is designed to add two extra readers to an Alarm.com 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.