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Copy| Product Name | ABB PM858K02 3BSE082896R1 AC 800M Redundant Processor Unit |
| Item NO. | 2931442 |
| Weight | 0.1 kg = 0.2205 lb = 3.5274 oz |
| Category | ABB |
| Brand | ABB |
| Creation Time | 2026-11-10 |
ABB Compact Product Suite · AC 800M
A complete AC 800M redundant processor kit with two CPUs, baseplates, bus terminators and controller-link cables.
ABB PM858K02 3BSE082896R1 is an AC 800M redundant processor unit for ABB Compact Product Suite control systems. The kit combines two PM858 processors with the baseplates, bus terminators and interconnection cables required to build one primary-and-backup controller pair rather than two unrelated CPUs.
Controller state between the two sides of ABB PM858K02 3BSE082896R1 travels through the supplied TK851 RCU-Link cable. Each processor is mounted on its TP830 baseplate, while the TB807 terminators and TK850 CEX-bus cable complete the documented expansion interfaces so the redundant link and communication bus can be inspected separately.
Before ABB PM858K02 3BSE082896R1 is commissioned, the application, firmware, hardware addresses and partner configuration are loaded consistently across the pair. Diagnostics are checked on both processors and the redundant connection is verified before a controlled role transfer confirms that the backup can assume operation.
| Technical item | Specification |
|---|---|
| Brand | ABB |
| Model | PM858K02 |
| Ordering number | 3BSE082896R1 |
| Product name | AC 800M redundant processor unit |
| Controller family | AC 800M / Compact Product Suite |
| Processor | MPC866 |
| Processor speed | 33 MHz |
| Memory | 16 MB |
| Application RAM available | 7.147 MB |
| Flash memory | Yes |
| CPU redundancy | Yes |
| Processor quantity | 2 PM858 CPU units |
| Baseplates | 2 TP830 baseplates, 115 mm |
| ModuleBus terminators | 2 TB807 |
| Redundancy cable | 1 TK851 RCU-Link cable |
| CEX-bus cable | 1 TK850 expansion cable |
| Backup batteries | 2 × 4943013-6 |
| System compatibility | 800xA 6.0.2 and Compact Control Builder 6.0.0-1 or later |
| License | Not included |
| Brand country | Switzerland |
ABB PM858K02 3BSE082896R1 maintains process control through a paired CPU architecture in which application execution, partner status and communication-bus diagnostics can be checked as separate operating conditions.
The active PM858 executes the configured AC 800M application and exchanges process values through the installed I/O and communication architecture. Its partner is not an independent controller project; it follows the same hardware and application record.
The RCU-Link carries redundancy state between the processors. Controller diagnostics distinguish a healthy synchronized partner from a processor that is merely powered, which helps isolate link, project or hardware-state problems.
CEX-bus and ModuleBus components have their own connections and terminators. Checking those paths independently prevents an expansion-bus fault from being misdiagnosed as a loss of controller redundancy.
Programming ABB PM858K02 3BSE082896R1 requires one consistent redundant-controller definition, matched processor settings and a controlled download and synchronization sequence.
Configure the two PM858 units as partners with the correct addresses, baseplates and connected communication modules. Do not create unrelated standalone CPU definitions for the two physical processors.
Confirm compatible firmware and load the approved application through the designated engineering connection. Compare hardware diagnostics on both sides before allowing the partner to synchronize.
After synchronization, review active and backup indications, communication status and application diagnostics. Perform an authorized controlled role transfer so the partner operation is verified before the pair returns to normal service.
For ABB PM858K02 3BSE082896R1, check the TK851 RCU-Link cable, partner addresses, firmware and redundant hardware configuration. Two healthy standalone states do not prove that synchronization is complete.
ABB PM858K02 3BSE082896R1 includes two PM858 CPUs, two TP830 baseplates, two TB807 terminators, TK850 and TK851 cables and two backup batteries; keep each item assigned to the same redundant kit record.
Inspect the TK850 cable, CEX modules and termination for the ABB PM858K02 3BSE082896R1 expansion path, then inspect TK851 separately for processor redundancy. The two cables do not serve the same function.
Back up the ABB PM858K02 3BSE082896R1 application, hardware tree, addresses, firmware information and current controller diagnostics so both partner units can be rebuilt consistently.
ABB PM858K02 3BSE082896R1 requires compatible processor firmware, the same approved project and correct partner configuration. A mismatch in any of these can keep the backup outside the synchronized state.
Confirm both ABB PM858K02 3BSE082896R1 processors are synchronized, CEX and ModuleBus diagnostics are normal, then complete the authorized controlled role-transfer test before normal operation.
Moore Automation keeps each PM858 redundant-kit enquiry attached to the full ABB model, order number and included hardware list.
Processor-pair quantities, baseplate and cable references, destination details and available supporting material remain together for consistent review.
Send the complete model and requested quantity.
Moore Automation Sales Team
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