Controller renewal
A maintenance team may source a verified single-processor package for an installed PM891 position or for a separately engineered redundant pair.
ABB PM891K01 Processor Unit
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Detailed Product Description
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ABB AC 800M Controller Hardware PM891K01 Processor UnitA single PM891 processor package for high-performance AC 800M control, Control Network communication and optical S800 I/O integration. TypeSingle Processor Package SystemAC 800M / System 800xA FocusHigh-Performance Control BrandABB Product IntroductionABB PM891K01, article 3BSE053241R1, is a single AC 800M processor package for high-performance control, Control Network communication and optical S800 I/O. It is a self-contained processor unit and does not use the TP830 baseplate found on other PM8xx families. Core Specifications
Network, I/O & Configuration01Control Network Use CN1 for a single network. Use CN1 and CN2 when the controller is engineered for a redundant Control Network. 02S800 I/O The unit has optical ModuleBus only. It supports seven clusters, each with up to twelve modules; redundant and non-redundant modules may be mixed within ABB limits. 03CEX-Bus expansion Communication interfaces are added on the CEX-Bus. ABB specifies up to twelve interfaces; BC810 can divide the bus into independent segments. Battery & Redundancy PlanningThe PM891 has no internal battery. If retained memory requires battery support, engineer the ABB external battery option and include its condition in the maintenance plan. For processor redundancy, ABB uses two separate links: TK855 for RCU data and TK856 for RCU control. The redundant arrangement also connects both processors to the same CEX-Bus and uses optical ModuleBus with two TB840 units for S800 I/O. K01 identifies the single-processor package. Do not treat a second loose CPU as a complete redundant conversion without checking the ABB redundancy cables, CEX-Bus arrangement, I/O connection and project configuration. Applications & Fault ScenariosControl Network lossCheck CN1/CN2 cabling, switch path, hardware address records and controller status before replacing the processor. Application will not loadCompare the installed System 800xA/Control Builder release, CPU firmware and project hardware definition before another download attempt. Additional Specifications
Official Documentation
Amikon ServiceCommercial supply support, separate from ABB technical documentation. Warehouse handling for planned automation spare shipments. Identity check Part number and visible condition reviewed. Test scope Available testing stated on the quotation. Packing & DOA Protective packing and prompt issue review. RMA & warranty Terms confirmed before the order is placed. Multi-brand Spare Parts Also RequestedXCPBDP00MI-B501AP-IV9907-028NXC1 NetAXS-123eTOP11-0050ML7421B1023ML7425A6008VS-4450EDSC318BRC-H700U1241B/U1242BAE2S-P01 These part numbers are independent purchasing references only. They are not replacements for the product on this page. Compatibility and stock must be confirmed separately for each item. FAQIs PM891K01 a redundant processor package?No. It is the single-processor package. The hardware supports redundancy only when a second processor and the specified ABB links, bus hardware and project configuration are added. Does PM891K01 use a TP830 baseplate?No. The processor is a monolithic unit with integrated termination. How is S800 I/O connected to PM891K01?Through optical ModuleBus. The verified limit is seven clusters and a maximum of 84 modules. Does PM891K01 have an internal backup battery?No. Use the ABB external battery arrangement when retained-memory backup is required. Which service port is available on PM891K01?COM4 is an isolated RS-232C service interface at 9,600 baud; COM3 is not supported. What should be included in a PM891K01 RFQ?Provide the part number, quantity, destination, required date, machine/system model, installed firmware or System 800xA release, and clear nameplate photos. RFQ for PM891K01For a faster technical and commercial check, send the installed-part details before the requested ship date. Email Miya Zheng
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| Product Tags: ABB PM891K01 processor unit ABB PLC processor module PM891K01 industrial control unit |
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