MR52 – Serial I/O Dual Card Reader Interface

Mercury Powered Access Control

MR52 Serial I/O Dual Card Reader Interface

The MR52 Series 3 is a dual card reader interface panel with on-board flexibility to connect a wide range of security devices. The MR52 is easy to install and provides the required I/O for interfacing two card readers, eight general-purpose input monitor points and six control relays to any Authentic Mercury series intelligent controller

  • Open Architecture: High performance, reliable platform
  • OSDP Protocol: Secure channel security for reader connectivity and extended applications such as biometrics and government.
  • Enhanced Security: Embedded crypto memory chip and data at rest
  • Versatile Interoperability: Same reliable interface and identical footprint as the Series 2 controllers

With two-wire RS-485 connectivity, the MR52’s two reader ports support OSDP, OSDP Secure Channel, FICAM government profiles, keypads, biometric readers, Wiegand, clock and data, magnetic stripe, F/2F and supervised F/2F reader technologies. System configuration and setup are provided through Mercury
OEM partner software applications.


MercPlatinumAbout Mercury Security
Mercury Security Corporation is the global leader in the supply of OEM access controller hardware. Built on an open platform, with over one million panels sold, Mercury has the largest installed base and greatest accumulated run time of any access hardware provider in the world. Headquartered in Long Beach, California, Mercury has been providing enhanced access control technology since 1992. For more information visit

Find a local Access Control and Security Expert

Use our interactive map to find a local Keri sales representative

Keri Extensive Warranties

Reliability Assured

We stand by our engineering and craftsmanship and are so confident of reliability that we back our products with extensive industry-leading warranties.

Grow Your Business with a Custom Keri Solution

Win new business and grow your security company. We're by your side from initial bid to final inspection.

Tell us your security project specifications

We begin the process with a 15-30 minute phone call to determine if we have a solution that can meet the needs of your job.

Together, we design an affordable solution

Our expert support team will help you design a security solution that meets your client’s needs and your financial requirements.

We partner with you to win new business

We know that once a plan is designed, there is still a competitive bidding process. We help you convince stakeholders and win new business.

Expert customer support  available

Once you’ve closed the sale and are on-site installing our equipment, our expert support team is available in the event that you need assistance.

Talk to us

Fill out the form below and an expert will reach out to give you more details on how to win new business with Keri.