{"product_id":"honeywell-204820k-security-system-module-board-ships-fast","title":"204820K | Honeywell Silent Knight Security System Module Board","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp\u003eThe Honeywell 204820K Silent Knight Security System Module Board is a supervised control board designed to expand or replace supervisory and notification circuit functionality in compatible Silent Knight fire alarm panels. It operates on a 24 V DC system and supports both Class A (Style Z) and Class B (Style Y) wiring configurations. The board provides monitored outputs for notification appliance circuits such as horns and strobes with status LED indication for real-time system feedback.\u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003ch4\u003eTechnical Specifications \u003c\/h4\u003e\n\u003ctable style=\"width: 100%; height: 293.907px;\"\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; 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: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eHoneywell \/ Silent Knight\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eFire Alarm Systems\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003e204820K\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eSystem Module Boards\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eDevice Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eSecurity\/Control Module Board\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eOperating Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003e24 V DC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eWiring Support\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eClass A (Style Z), Class B (Style Y)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eSupervisory Monitoring\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eYes\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eStatus Indicators\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eLED Indicators\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eMounting Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003ePanel\/Enclosure Mount (PCB)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eApplication\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eFire Alarm Notification \u0026amp; Supervision\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eCertifications\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003eUL Listed\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr style=\"height: 19.5938px;\"\u003e\n\u003ctd style=\"width: 33.9912%; height: 19.5938px;\"\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"width: 65.7895%; height: 19.5938px;\"\u003e~1.0 lb (approx.)\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 204820K\u003c\/h4\u003e\n\u003cp data-end=\"1011\" data-start=\"424\"\u003eThe 204820K is a replacement or add-on printed circuit board (PCB) module manufactured by Silent Knight, a Honeywell brand, for use in specific fire alarm control systems. It is designed to install within the existing fire alarm panel enclosure and interface with the panel’s logic to provide supervised notification output and supervisory monitoring. The module supports the wiring standards required for fire protection systems, allowing both Class A and Class B loop styles. Additionally, status LEDs on the board provide visual indication of board activity and channel status to aid technicians during installation and maintenance. This board is UL listed and suitable for life safety applications, though it may be discontinued and is often sourced as surplus or refurbished.\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\u003e24 V DC Operating Voltage: Designed for use with standard fire alarm system power.\u003c\/li\u003e\n\u003cli\u003eSupervised Outputs: Monitors notification appliance circuits and wiring integrity.\u003c\/li\u003e\n\u003cli\u003eClass A\/B Wiring Support: Compatible with both Style Z and Style Y loop configurations.\u003c\/li\u003e\n\u003cli\u003eStatus LEDs: Visual LED indicators for real-time operational feedback.\u003c\/li\u003e\n\u003cli\u003eOEM Silent Knight\/Honeywell Part: Genuine module for supported Silent Knight systems.\u003c\/li\u003e\n\u003cli\u003ePCB Format: Printed circuit board only for service or expansion.\u003c\/li\u003e\n\u003cli\u003eUL Listed: Suitable for regulated fire alarm applications.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe 204820K delivers the reliability and precision required for supervised notification and control expansion within Silent Knight fire alarm systems.\u003c\/p\u003e","brand":"Honeywell","offers":[{"title":"Default Title","offer_id":51175122534698,"sku":"204820K","price":427.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/s-l1600_ba639931-0268-48da-980e-e4bbea6a36a3.webp?v=1771856505","url":"https:\/\/iqelectro.com\/products\/honeywell-204820k-security-system-module-board-ships-fast","provider":"IQElectro","version":"1.0","type":"link"}