Product Details
Kit Contents (PM891K02):
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2 x PM891K01 Processor Unit
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1 x TK850V007 CEX-Bus Extension Cable
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1 x TK855 RCU Data Link Cable
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1 x TK856 RCU Control Link Cable
Important Note: The BC810K02 CEX-Bus Interconnection Unit is not included in the kit. It must be ordered separately to enable hot replacement of PM891 processor units .
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FAQs
Q1: What is the primary function of the PM891K02?
It is the highest-performance redundant processor unit kit for the AC 800M controller platform. It executes control logic, manages data processing, and coordinates communication with I/O modules in ABB Ability™ System 800xA. The redundant configuration ensures uninterrupted operation in critical processes such as power generation, oil & gas, and chemical production.
Q2: What is included in the PM891K02 kit?
The kit includes 2 x PM891K01 processor units, 1 x TK850V007 CEX-Bus Extension Cable, 1 x TK855 RCU Data Link Cable, and 1 x TK856 RCU Control Link Cable. BC810K02 is not included and must be ordered separately for hot-swap capability.
Q3: How does the redundancy work?
Two PM891K01 processor units operate in hot-standby configuration. The primary CPU processes all tasks while the backup CPU synchronizes data in real time. If the primary CPU fails, the backup takes over in ≤10 ms without interrupting field I/O or HMI communication.
Q4: Does the PM891 require a battery?
No. Unlike earlier AC 800M processors, the PM891 does not contain an internal battery. It uses a Secure Digital (SD) interface for firmware and data storage. The real-time clock is maintained via the system power supply.
Q5: What are the typical applications for this controller?
The PM891K02 is used in oil & gas (upstream and downstream process control), power generation (boiler and turbine control), chemical and petrochemical (reactor and distillation control), pharmaceutical (batch and continuous processes), and metallurgy (furnace and rolling mill control).
