Mercury•Access Control
SKU: ADC-AC-MR52 | MPN: ADC-AC-MR52
$299.99
In Stock — Only 1 left
The Alarm.com ADC-AC-MR52 is a two-reader expansion module that extends your Alarm.com Mercury-based access control system with additional door coverage. Each MR52 adds two card reader ports, eight general-purpose programmable input monitor points, and six Form C control relays to any Alarm.com Mercury EP series intelligent controller. Designed as a direct replacement for the legacy ADC-ACX2, the MR52 provides enhanced Series 3 security with AES-128/256 encrypted communication over the RS-485 bus and an embedded cryptographic memory chip. Reader ports support Wiegand, F/2F, and OSDP Secure Channel protocols, giving you flexibility with both legacy and modern card readers. Input circuits can be individually configured for normally-open or normally-closed operation, with optional end-of-line resistor supervision. The six relay outputs are individually programmable for fail-safe or fail-secure operation, making this module ideal for expanding door control, elevator access, and auxiliary device monitoring across your Alarm.com security installation.
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