{"product_id":"pm891k01-abb-ac-800m-3bse053241r1-processor-unit","title":"PM891K01 | ABB AC 800M 3BSE053241R1 Processor Unit","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003eABB PM891K02\u003c\/strong\u003e (3BSE053242R1) is a \u003cstrong\u003eredundant high-performance Processor Unit Kit\u003c\/strong\u003e featuring two PM891 CPUs. It delivers the highest available AC 800M performance with hot-standby redundancy for critical automation infrastructure.\u003c\/p\u003e\n\n\u003ch3\u003eKey Specifications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e ABB\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePart Number:\u003c\/strong\u003e PM891K02 (3BSE053242R1)\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eProduct Type:\u003c\/strong\u003e AC 800M Redundant Processor Unit Kit\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eCPU:\u003c\/strong\u003e 2× MPC8270 @ 450 MHz\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eMemory:\u003c\/strong\u003e 256 MB DDR2 SDRAM per CPU\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePerformance:\u003c\/strong\u003e 0.043 ms per 1000 boolean operations; ~3× PM864A per CPU\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eRedundancy:\u003c\/strong\u003e Hot-standby CPU, CEX-Bus, RCU Control \u0026amp; Data Links\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSwitchover Time:\u003c\/strong\u003e Max 10 ms\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eSystem:\u003c\/strong\u003e AC 800M \/ System 800xA\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eKit Includes:\u003c\/strong\u003e 2× PM891K01 Processor Unit, 1× TK850V007 CEX-Bus Extension Cable, 1× TK855 RCU Data Link Cable, 1× TK856 RCU Control Link Cable\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003eNote:\u003c\/strong\u003e BC810K02 is not included and must be ordered separately for hot replacement capability\u003c\/li\u003e\n  \u003cli\u003e\n\u003cstrong\u003ePower Supply:\u003c\/strong\u003e 24 V DC (19.2–30 V DC)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eApplications\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eCritical power plant control\u003c\/li\u003e\n  \u003cli\u003eLarge refinery DCS\u003c\/li\u003e\n  \u003cli\u003eIntegrated process-safety systems\u003c\/li\u003e\n  \u003cli\u003eHigh-availability manufacturing\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eQ: What redundancy links does PM891 use?\u003c\/strong\u003e\u003cbr\u003eA: PM891 uses TK855 RCU Data Link and TK856 RCU Control Link (dual redundancy links), unlike other PM8xx which use a single TK851 RCU Link.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Can PM891K02 be mixed with other CPU types?\u003c\/strong\u003e\u003cbr\u003eA: No, redundant pairs must be identical processor models and firmware revisions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eQ: Why is BC810K02 required separately?\u003c\/strong\u003e\u003cbr\u003eA: BC810K02 CEX-Bus Interconnection Unit is required to enable hot replacement of PM891 processor units. It is not included in the PM891K02 kit and must be ordered separately.\u003c\/p\u003e\n\n\u003ch3\u003eInstallation Guide\u003c\/h3\u003e\n\u003col\u003e\n  \u003cli\u003eMount both PM891 units on DIN rail with adequate spacing for ventilation.\u003c\/li\u003e\n  \u003cli\u003eConnect TK855 RCU Data Link and TK856 RCU Control Link between the two units.\u003c\/li\u003e\n  \u003cli\u003eInstall BC810K02 on TP857 if hot replacement is required.\u003c\/li\u003e\n  \u003cli\u003eWire independent 24 V DC power to each unit.\u003c\/li\u003e\n  \u003cli\u003eConnect control network Ethernet to both units.\u003c\/li\u003e\n  \u003cli\u003eConfigure redundancy in Control Builder M.\u003c\/li\u003e\n\u003c\/ol\u003e\n\n\u003ch3\u003eSelection Tips\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003ePM891K02 is the top-tier choice for performance and availability.\u003c\/li\u003e\n  \u003cli\u003eVerify software version supports PM891 redundancy.\u003c\/li\u003e\n  \u003cli\u003eUse optical ModuleBus for I\/O; electrical ModuleBus is not available on PM891.\u003c\/li\u003e\n  \u003cli\u003eRemember to order BC810K02 separately for hot replacement capability.\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":53844389888184,"sku":"PM891K01","price":99.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0935\/6132\/3704\/files\/PM891K01_3.png?v=1785480402","url":"https:\/\/www.globalpetroparts.com\/products\/pm891k01-abb-ac-800m-3bse053241r1-processor-unit","provider":"Global Petro Parts Automation","version":"1.0","type":"link"}