{"product_id":"5820xl-silent-knight-addressable-fire-alarm-control-panel-with-digital-communicator","title":"5820XL | Silent Knight Addressable Fire Alarm Control Panel with Digital Communicator","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-end=\"396\" data-start=\"144\"\u003eThe Silent Knight 5820XL is an intelligent addressable fire alarm control panel designed to provide reliable detection and reporting across large facilities. It supports both SK and SD protocol devices, integrates a built-in digital communicator, and features distributed intelligent power with modular expansion capabilities.\u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003cp class=\"\" data-end=\"574\" data-start=\"284\"\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 705.376px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003eNew\/Never Used Surplus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003eSilent Knight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003eFire Alarm Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e5820XL\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003eFire Alarm Control Panels\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003ePrimary AC\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e120 Vrms 50\/60 Hz, 2.5A or 240 Vrms 50\/60 Hz, 1.4A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e27.4 VDC system power\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eTotal Accessory Load\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e6A @ 27.4 VDC, power-limited\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eFlexput Circuits\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003eSix programmable circuits: notification (3A @ 27.4 VDC), auxiliary (3A @ 27.4 VDC), or initiation (100 mA @ 27.4 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eStandby Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e215 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eAlarm Current\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e385 mA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eNotification Power\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e3A per circuit @ 27.4 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eRelays\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003eOne Form C trouble relay, two Form C programmable relays (2.5A @ 27.4 VDC each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eBattery Charging Capacity\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e7.0–35 AH\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eBattery Size in Panel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003eUp to 18 AH (larger batteries require external cabinet)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eDevice Support (SK Protocol)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e99 detectors, 99 modules (expandable to 396 each)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eDevice Support (SD Protocol)\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e127 devices (expandable to 508)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eCommunication Interfaces\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003eBuilt-in digital communicator, RS-232, USB, RS-485 bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eOutput Cadences\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e13 pre-programmed including ANSI 3.41\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eAnnunciator Display\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e80-character LCD with tactile keypad\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eMounting Options\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003eSurface or flush mount\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eEnclosure Color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003eRed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eFlush Mount Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e14.5\" W x 24.75\" H x 3.9\" D (36.8 x 62.9 x 9.8 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 39.1875px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 39.1875px;\"\u003e\u003cstrong\u003eOverall Dimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 39.1875px;\"\u003e16.2\" W x 26.4\" H x 4.2\" D (40.6 x 67 x 11.8 cm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 23.2963%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 76.3401%; height: 19.5938px;\"\u003e28 lbs (12.8 kg)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003e\u003cbr\u003e\u003c\/h4\u003e\n\u003ch4\u003eInformation About \u003cspan data-sheets-root=\"1\"\u003e5820XL\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe 5820XL is part of Silent Knight’s IntelliKnight® series, offering intelligent addressable fire detection with modular expandability and powerful communication features. It supports up to 396 SK detectors and 396 SK modules or 508 SD devices, giving system designers flexibility for both small and large projects. Equipped with Flexput™ circuits, the 5820XL allows each circuit to be programmed as notification, auxiliary power, or initiation, reducing installation complexity and increasing design versatility. A built-in UL-listed digital communicator provides dual-line reporting to remote monitoring centers, while integrated drift compensation, maintenance alerts, and programmable cadences enhance detection reliability and alarm management.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eHigh Device Capacity: Supports up to 396 SK devices or 508 SD devices depending on protocol.\u003c\/li\u003e\n\u003cli\u003eFlexible Flexput™ Circuits: Six programmable circuits configurable as notification, auxiliary power, or initiation.\u003c\/li\u003e\n\u003cli\u003eIntegrated Digital Communicator: Dual-line communicator supervises two phone lines with advanced reporting functions.\u003c\/li\u003e\n\u003cli\u003eBuilt-in Annunciator: 80-character LCD display with large keypad provides user-friendly operation and programming.\u003c\/li\u003e\n\u003cli\u003eAdvanced Detection Technology: Features drift compensation, maintenance alert, and nuisance alarm reduction.\u003c\/li\u003e\n\u003cli\u003eModular Expandability: Compatible with accessories such as 5860 annunciator, 5815XL SLC expander, and 5895XL power module.\u003c\/li\u003e\n\u003cli\u003eProgrammable Outputs: Offers 13 pre-programmed cadences including ANSI 3.41 and four programmable outputs.\u003c\/li\u003e\n\u003cli\u003eRelay Support: Includes one Form C trouble relay and two programmable relays rated for auxiliary device control.\u003c\/li\u003e\n\u003cli\u003eSystem Synchronization: Supports synchronization with AMSECO®, Gentex®, Faraday, System Sensor®, and Wheelock® devices.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 5820XL delivers the reliability and precision required for comprehensive fire detection, large-scale system integration, and NFPA-compliant monitoring.\u003c\/p\u003e","brand":"Silent Knight","offers":[{"title":"Default Title","offer_id":49105210638592,"sku":"5820XL","price":4138.05,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0388\/5331\/2557\/files\/wmremove-transformed_13.webp?v=1785542598","url":"https:\/\/alotechparts.com\/products\/5820xl-silent-knight-addressable-fire-alarm-control-panel-with-digital-communicator","provider":"Alo Tech Solutions","version":"1.0","type":"link"}