AC 800M ABB PM862K01 (3BSE076940R1) Processor Unit

Overview

The ABB PM862K01 (3BSE076940R1) is an advanced processor unit designed for the AC 800M controller family, offering reliable performance for distributed and process automation. Based on the MPC866 processor, it supports demanding control environments with high-speed execution, redundant operation, and flexible communication capabilities. Its design ensures consistent performance, short failover times, and precise synchronization across networked controllers.

Core Specifications

• Processor Type: MPC866 microprocessor

• System Redundancy: Supported, with maximum switch-over time of 10 ms

• Controller Capacity:

• 32 applications per controller

• 64 programs per application

• 128 function diagrams per application

• 32 tasks per controller

• Cycle Times: Up to 32 different cycles, with a minimum execution time of 1 ms per program

• Firmware Storage: 4 MB Flash PROM

• Backup Battery: Built-in 3.6 V lithium cell for memory retention

• Clock Synchronization: 1 ms precision between controllers via CNCP protocol

Electrical Characteristics

• Power Supply: 24 V DC (operating range 19.2–30 V DC)

• Current Consumption: 210 mA typical, 360 mA maximum

• Power Dissipation: 5.1 W typical, 8.6 W maximum

• Redundant Power Input Monitoring: Supported

Communication Interfaces

• Ethernet Ports: Two RJ-45 connections (IEEE 802.3, 10 Mbit/s)

• Supported Network Protocols: MMS (Manufacturing Message Service) and IAC (Inter Application Communication)

• Recommended Backbone: 100 Mbit/s switched Ethernet network

• OPC Event Handling:

• Event queue: up to 3000 events per OPC client

• Transfer speed: 36–86 events/sec, 113–143 data messages/sec

• CEX Bus Support: Up to 12 communication modules

• CEX Bus Current: Max 2.4 A

I/O and Bus Configuration

• I/O Clusters (Non-Redundant CPU): 1 electrical + 7 optical

• I/O Clusters (Redundant CPU): 7 optical

• Maximum I/O Capacity: 96 modules (single CPU) or 84 modules (redundant configuration)

• ModuleBus Scan Rate: 0–100 ms, depending on I/O load

• Electrical ModuleBus Supply:

• 24 V: up to 1.0 A

• 5 V: up to 1.5 A

Additional Features

• RS-232C Interfaces: Two ports (one general-purpose, one service port)

• COM3: Non-isolated, 75–19,200 baud, full RTS/CTS support

• COM4: Optically isolated, 9,600 baud, no RTS/CTS support

• Real-Time Clock Stability: 100 ppm (approx. one hour drift per year)

Application Scenarios

The PM862K01 is suited for:

• Large-scale industrial automation and process control systems

• Power generation, petrochemical, and water treatment facilities

• Applications requiring redundancy, high-speed data handling, and deterministic performance

FAQ

Q: How does the PM862K01 differ from the PM858K01?
A: The PM862K01 offers similar CPU architecture but improved redundancy handling and optimized performance stability for mission-critical control systems.

Q: Can this processor be used in non-redundant mode?
A: Yes. The PM862K01 functions effectively as both a single and redundant controller within AC 800M networks.