{"product_id":"mercury-mr52-s3-dual-door-access-controller-in-stock","title":"MR52-S3 | Mercury Security dual-door sub-controller, 2 readers, 8 inputs, 6 relays, RS-485 communication","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"0\" data-end=\"451\"\u003eThe Mercury MR52-S3 is a dual-door sub-controller designed to expand access control systems with reliable I\/O and multi-reader support. This part number provides interfaces for two card readers, eight monitored inputs, and six Form C relays for door and auxiliary control. Its RS-485 communication architecture allows seamless integration with Mercury EP series intelligent controllers.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMercury Security\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSub-Controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMR52-S3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAccess Control Expansion Module\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eType\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eDual-door sub-controller\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePrimary Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12–24 VDC ±10%, 150 mA max\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReaders Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e8 standard monitored inputs\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutputs\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6 Form C relays, 5 A at 30 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRS-485 required\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eReader Technologies\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eWiegand, F\/2F, OSDP Secure Channel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCompatibility\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMercury EP series controllers\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSecurity Features\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eAES-128\/256 encrypted communication; onboard cryptographic memory\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInstallation\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSame footprint as MR52 Series 2\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAuxiliary I\/O\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 auxiliary inputs and 4 auxiliary outputs (board-level)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eInformation About MR52-S3\u003c\/h4\u003e\n\u003cp data-start=\"590\" data-end=\"1074\" class=\"\"\u003eThe MR52-S3 is part of Mercury Security’s Series 3 sub-controller lineup, engineered to extend door control capability within enterprise access systems. Designed as a direct replacement for the MR52 Series 2, it retains the same footprint and interface, enabling straightforward upgrades without reprogramming. The unit supports multiple reader technologies—including Wiegand, F\/2F, and OSDP with Secure Channel—and provides additional auxiliary inputs and outputs for flexible device integration. Typical applications include two-door access control, secure facility management, and system expansion where encrypted communication and high I\/O density are required.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-start=\"1085\" data-end=\"1102\"\u003eKey Features:\u003cbr\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eTwo-Door Sub-Controller: Supports 2 readers and complete door I\/O for controlled entry points.\u003c\/li\u003e\n\u003cli\u003eEight Standard Inputs: Enables monitoring of door position switches, REX devices, and auxiliary points.\u003c\/li\u003e\n\u003cli\u003eSix Form C Relays: Provides 5A-rated relay outputs for locks, alarms, or automation control.\u003c\/li\u003e\n\u003cli\u003eRS-485 Connectivity: Ensures secure, encrypted communication with Mercury EP controllers.\u003c\/li\u003e\n\u003cli\u003eMulti-Technology Reader Support: Compatible with Wiegand, F\/2F, and OSDP Secure Channel readers.\u003c\/li\u003e\n\u003cli\u003eSeries 2 Footprint Match: Directly replaces the MR52 Series 2 without wiring or software changes.\u003c\/li\u003e\n\u003cli\u003eIntegrated Cryptographic Module: Protects encryption keys and enhances system data security.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe MR52-S3 delivers the reliability and precision required for scalable, secure access control expansion.\u003c\/p\u003e","brand":"Mercury Security","offers":[{"title":"Default Title","offer_id":47270188810538,"sku":"MR52-S3","price":910.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/MR52-S3.webp?v=1704122307","url":"https:\/\/iqelectro.com\/products\/mercury-mr52-s3-dual-door-access-controller-in-stock","provider":"IQElectro","version":"1.0","type":"link"}