{"product_id":"bosch-b520-sdi2-auxiliary-power-supply-module-12v-2a","title":"Bosch B520 SDI2 Auxiliary Power Supply Module 12V 2A","description":"\u003ch4\u003eDescription \u003c\/h4\u003e\n\u003cp data-start=\"144\" data-end=\"396\"\u003e\u003cmeta charset=\"utf-8\"\u003eThe Bosch B520 Auxiliary Power Supply Module is a 12V, 2A expansion module designed to enhance power capacity for Bosch control panels. It provides stable auxiliary power for connected devices and supervises up to two 12V batteries, ensuring reliable operation in both fire and intrusion applications. Built for industrial, commercial, and institutional systems, the B520 enables efficient power management with seamless SDI2 bus communication.\u003cbr\u003e\u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\u003e \u003c\/p\u003e\n\u003cp data-start=\"284\" data-end=\"574\" class=\"\"\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\u003eBosch Security\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBatteries \u0026amp; Power Supplies\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003ePart Number\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eB520\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSubcategory\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003ePower Supply Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOutput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e12 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eStandby Current Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e2 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAlarm Current Output\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4 A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBattery Capacity Supported\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 36 Ah (two 12V 7–18 Ah batteries)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eInput Voltage\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e18 VAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCommunication Interface\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eSDI2 bus\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBackup Time\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUp to 80 hours\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eTransformer Type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBosch TR1850 plug-in transformer\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSupervision\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eIndependent supervision for each connected battery\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eAddress Configuration\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRotary switch addressing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMetal housing (panel-mounted)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eOperating Temperature\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0°C to +49°C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWidth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e6.9 in (176.2 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eHeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e4.5 in (114.3 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDepth\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.2 in (29 mm)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eCountry of Origin\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eUnited States\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e1.2 lb (0.54 kg)\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 \u003cmeta charset=\"utf-8\"\u003e\n\u003cspan data-sheets-root=\"1\"\u003eB520\u003c\/span\u003e\n\u003c\/h4\u003e\n\u003cp\u003eThe B520 is part of Bosch’s SDI2 accessory line, designed to deliver additional 12V power and intelligent supervision to compatible control panels. It supplies up to 2A of standby current for fire or intrusion systems and up to 4A during alarm conditions. The module independently supervises two 7–18 Ah batteries for up to 36 Ah of total capacity, with automatic reporting of any status changes to the panel. Featuring rotary address switches, SDI2 output terminals, and robust expansion support, the B520 is a dependable choice for complex security and fire installations requiring additional auxiliary power.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKey Features:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eAuxiliary Power Output: Provides up to 2A of 12V standby current or 4A of alarm current.\u003c\/li\u003e\n\u003cli\u003eBattery Supervision: Independently monitors up to two 12V 7–18 Ah batteries for a total of 36 Ah capacity.\u003c\/li\u003e\n\u003cli\u003eExtended Backup Duration: Supports up to 80 hours of standby operation for critical systems.\u003c\/li\u003e\n\u003cli\u003eSDI2 Bus Communication: Enables direct communication and supervision through Bosch control panels.\u003c\/li\u003e\n\u003cli\u003eFlexible Power Distribution: Offers SDI2 Out and AUX PWR terminals for expansion devices and sensors.\u003c\/li\u003e\n\u003cli\u003eRotary Addressing: Simple and reliable address configuration using easy-to-read switches.\u003c\/li\u003e\n\u003cli\u003eUniversal Compatibility: Works with Bosch control panels and standard TR1850 plug-in transformers.\u003c\/li\u003e\n\u003cli\u003eCompact Design: Space-efficient form factor for easy integration in enclosures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe B520 delivers the reliability and precision required for stable auxiliary power and battery supervision in demanding fire and intrusion applications.\u003c\/p\u003e","brand":"Bosch","offers":[{"title":"Default Title","offer_id":50685908123946,"sku":"B520","price":379.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0800\/0392\/4266\/files\/1025431290_lg.jpg?v=1760453775","url":"https:\/\/iqelectro.com\/products\/bosch-b520-sdi2-auxiliary-power-supply-module-12v-2a","provider":"IQElectro","version":"1.0","type":"link"}