{"product_id":"abb-6644424a1-harmony-rack-hw","title":"ABB 6644424A1 Harmony Rack HW","description":"\u003cp\u003eThe \u003cstrong\u003eABB 6644424A1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003e6644424A1\u003c\/strong\u003e Voltage Bus Monitor Assembly, operates as a dedicated hardware component for power rail surveillance within Harmony rack HW systems. Configured for real-time voltage monitoring, the device checks the integrity of the MPSIII DC bus infrastructure. It provides direct physical execution to trace backplane power state changes and capture power distribution faults natively at the hardware layer.\u003c\/p\u003e\n\u003ch3\u003eHardware Specifications\u003c\/h3\u003e\n\u003cfigure class=\"table\"\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/th\u003e\n\u003cth\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eModel\u003c\/td\u003e\n\u003ctd\u003e6644424A1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eABB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrigin\u003c\/td\u003e\n\u003ctd\u003eIndia (IN)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003e1.2 kg (Gross Shipping Weight) \/ 0.9 kg (Net Weight estimated)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eStandard Symphony Harmony rack module format\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to 60 deg C (Standard control room cabinet limits)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003eSourced via internal MPSIII DC backplane rails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMonitored Medium\u003c\/td\u003e\n\u003ctd\u003eMPSIII DC Bus power lines\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Family\u003c\/td\u003e\n\u003ctd\u003eHarmony rack HW\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCustoms Tariff Code\u003c\/td\u003e\n\u003ctd\u003e8536308000\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eVoltage Monitoring Modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003ePower Monitoring \u0026amp; Backplane Bus Velocity\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eBackplane Bus Communication Velocity and Signal Capture\u003c\/strong\u003e The 6644424A1 integrates with the parallel Harmony backplane, monitoring the steady-state potential of the power bus. When voltage levels drift from nominal parameters, the internal measurement logic switches state within microseconds, sending a direct logic interrupt across the rack assembly to inform the local processing controllers before a full brownout occurs.\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eProfinet \/ EtherNet\/IP Deterministic Networks Integration\u003c\/strong\u003e In integrated DCS structures, raw fault markers from the bus monitor are captured by network interface modules. This architecture maps local power status changes into deterministic networks, avoiding communications lag and letting upstream systems flag power dropouts before it interferes with process execution.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003eQ: What specific hardware symptoms or fault indications happen if one of the monitored redundant DC power rails suffers a total voltage collapse?\u003c\/p\u003e\n\u003cp\u003eA: The internal hardware comparators drop their balancing relays immediately, clearing the power health status flag. This event triggers an unmasked power fault flag in the local controller card status register and illuminates a red diagnostic LED on the module assembly faceplate.\u003c\/p\u003e\n\u003cp\u003eQ: Can the 6644424A1 monitor assembly be hot-swapped while the MPSIII DC bus remains energized under live system loads?\u003c\/p\u003e\n\u003cp\u003eA: Yes, the physical hardware layout supports extraction and insertion under live backplane power. However, standard field procedures require isolating the auxiliary measurement circuits to prevent localized voltage dips or accidental grounding faults on the active power rails during the swap.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":45124058218611,"sku":"6644424A1","price":233.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0644\/4348\/2227\/files\/screenshot_2026-06-23_11-01-01.png?v=1782186336","url":"https:\/\/www.dcssupplier.com\/products\/abb-6644424a1-harmony-rack-hw","provider":"DcsSupplier Limited","version":"1.0","type":"link"}