{"product_id":"abb-ac-800m-pm856ak01-stu3bse069514r1-stu-processor-unit","title":"ABB AC 800M PM856AK01 STU3BSE069514R1 STU Processor Unit","description":"\u003ch2\u003eABB PM856AK01 STU Processor Unit\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB PM856AK01 STU 3BSE069514R1\u003c\/strong\u003e, also cataloged as the \u003cstrong\u003ePM856AK01\u003c\/strong\u003e Processor Unit, provides CPU execution, communication handling, and I\/O data processing functions within ABB AC 800M System 800xA controller platforms.\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\u003eParameter\u003c\/th\u003e\n\u003cth\u003eSpecification\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\u003ePM856AK01 STU\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\u003eSweden\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Type\u003c\/td\u003e\n\u003ctd\u003eAC 800M Processor Unit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOrder Number\u003c\/td\u003e\n\u003ctd\u003e3BSE069514R1\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eController Platform\u003c\/td\u003e\n\u003ctd\u003eAC 800M\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSystem Compatibility\u003c\/td\u003e\n\u003ctd\u003eABB System 800xA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProcessor Type\u003c\/td\u003e\n\u003ctd\u003eMPC860\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eClock Frequency\u003c\/td\u003e\n\u003ctd\u003e24 MHz\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePerformance\u003c\/td\u003e\n\u003ctd\u003e0.46 ms per 1000 Boolean operations\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMemory\u003c\/td\u003e\n\u003ctd\u003e16 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication RAM Available\u003c\/td\u003e\n\u003ctd\u003e10.337 MB\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFirmware Storage\u003c\/td\u003e\n\u003ctd\u003e2 MB Flash PROM\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRedundancy\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eHigh Integrity\u003c\/td\u003e\n\u003ctd\u003eNo\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Supply\u003c\/td\u003e\n\u003ctd\u003e24 VDC (19.2 to 30 VDC)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Consumption\u003c\/td\u003e\n\u003ctd\u003e180 mA typical \/ 300 mA maximum at 24 VDC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePower Dissipation\u003c\/td\u003e\n\u003ctd\u003e4.32 W typical \/ 7.2 W maximum\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBackup Battery\u003c\/td\u003e\n\u003ctd\u003eLithium 3.6 V\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthernet Ports\u003c\/td\u003e\n\u003ctd\u003e2 x RJ45\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthernet Standard\u003c\/td\u003e\n\u003ctd\u003eIEEE 802.3\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEthernet Speed\u003c\/td\u003e\n\u003ctd\u003e10 Mbit\/s\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eControl Network Protocol\u003c\/td\u003e\n\u003ctd\u003eMMS and IAC\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eSerial Interfaces\u003c\/td\u003e\n\u003ctd\u003e2 x RS-232C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM3 Interface\u003c\/td\u003e\n\u003ctd\u003eRS-232C with modem control signals, 75 to 19200 baud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCOM4 Interface\u003c\/td\u003e\n\u003ctd\u003eIsolated RS-232C service port, 9600 baud\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eModuleBus Capacity\u003c\/td\u003e\n\u003ctd\u003eMaximum 96 I\/O modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCEX Bus Capacity\u003c\/td\u003e\n\u003ctd\u003eMaximum 12 single CEX bus modules\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplications per Controller\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003ePrograms per Application\u003c\/td\u003e\n\u003ctd\u003e64\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDiagrams per Application\u003c\/td\u003e\n\u003ctd\u003e128\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eTasks per Controller\u003c\/td\u003e\n\u003ctd\u003e32\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMinimum Cycle Time\u003c\/td\u003e\n\u003ctd\u003eDown to 1 ms\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eReal-Time Clock Stability\u003c\/td\u003e\n\u003ctd\u003e100 ppm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eOperating Temp\u003c\/td\u003e\n\u003ctd\u003e0 to +55 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eStorage Temp\u003c\/td\u003e\n\u003ctd\u003e-40 to +70 deg C\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eRelative Humidity\u003c\/td\u003e\n\u003ctd\u003e5 to 95 %, non-condensing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eProtection Class\u003c\/td\u003e\n\u003ctd\u003eIP20\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003e119 x 186 x 135 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eWeight\u003c\/td\u003e\n\u003ctd\u003eApproximately 1.2 kg including base\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/figure\u003e\n\u003ch3\u003eIndustrial Control Communication and Firmware Compatibility\u003c\/h3\u003e\n\u003cp\u003eThe ABB PM856AK01 STU processor unit communicates with AC 800M control networks through dual Ethernet RJ45 interfaces. Additionally, the controller uses ModuleBus communication for S800 I\/O expansion and supports CEX bus modules for external communication functions.\u003c\/p\u003e\n\u003cp\u003eThe processor includes firmware storage through Flash PROM and executes Control Builder applications within the System 800xA environment. Furthermore, the controller architecture supports deterministic backplane bus communication velocity for PLC\/DCS task execution and I\/O density scaling through connected S800 I\/O modules.\u003c\/p\u003e\n\u003cp\u003eThe CPU board integrates the microprocessor, RAM memory, real-time clock, LED status indicators, INIT push button, and CompactFlash interface. Therefore, the module provides centralized execution and diagnostic functions for AC 800M controller configurations.\u003c\/p\u003e\n\u003ch3\u003eFrequently Asked Questions\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Does the ABB PM856AK01 STU support redundant processor operation?\u003c\/strong\u003e\u003cbr\u003eA: No. The PM856AK01 STU is a non-redundant AC 800M processor unit. Redundant controller architectures require compatible redundant processor models.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Which communication interfaces are available on the PM856AK01 STU?\u003c\/strong\u003e\u003cbr\u003eA: The processor provides two RJ45 Ethernet ports for Control Network communication and two RS-232C serial interfaces for service and communication functions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: How does the PM856AK01 STU connect to S800 I\/O modules?\u003c\/strong\u003e\u003cbr\u003eA: The processor connects to S800 I\/O modules through the ModuleBus interface and supports up to 96 I\/O modules according to system configuration requirements.\u003c\/p\u003e\n\u003ch3\u003eField Installation Guidelines\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eInstall the PM856AK01 STU processor unit on the specified ABB AC 800M mounting base and DIN rail assembly.\u003c\/li\u003e\n\u003cli\u003eVerify the 24 VDC power supply wiring before energizing the controller.\u003c\/li\u003e\n\u003cli\u003eConnect Ethernet communication cables according to ABB Control Network topology requirements.\u003c\/li\u003e\n\u003cli\u003eInstall ModuleBus termination components correctly when connecting S800 I\/O modules.\u003c\/li\u003e\n\u003cli\u003eMaintain proper cable separation between communication wiring and high-voltage power conductors.\u003c\/li\u003e\n\u003cli\u003eConnect cable shields according to industrial grounding practices to reduce electromagnetic interference.\u003c\/li\u003e\n\u003cli\u003eCheck CPU LED indicators during startup, operation, and fault diagnostics.\u003c\/li\u003e\n\u003cli\u003eConfirm that the installation environment complies with operating temperature, humidity, and IP20 enclosure requirements.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44650690052184,"sku":"PM856AK01 STU3BSE069514R1","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0670\/2039\/0488\/files\/PM856AK01-STU3BSE069514R1-3_1200x1200_f32a0811-570d-48e2-b67d-8bb412658958.jpg?v=1787564848","url":"https:\/\/www.industriaxplc.com\/id\/products\/abb-ac-800m-pm856ak01-stu3bse069514r1-stu-processor-unit","provider":"IndustriaX Limited","version":"1.0","type":"link"}