PM866 3BSE050200R1 ABB AC800M DCS Controller Module

Product Description

The PM866 (3BSE050200R1) controller module is part of ABB’s AC800M distributed control system (DCS) platform. It is engineered to deliver high-performance processing, redundancy support, and reliable communication for complex automation tasks. This module is widely used in industries requiring continuous operation and precise control, including power generation, petrochemicals, and large-scale manufacturing.

Technical Specifications

• Processor: High-performance embedded CPU optimized for AC800M architecture

• Redundancy: Supports redundant configurations with fast switch-over times

• Application Handling:

• Up to 32 applications per controller

• 64 programs per application

• 128 diagrams per application

• 32 tasks per controller

• Cycle Times: Configurable cycle times, minimum down to 1 ms

• Firmware Storage: Integrated Flash PROM for system firmware

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

• Power Consumption: Typical 210 mA, maximum 360 mA

• Power Dissipation: 5.1 W (maximum 8.6 W)

• Backup Battery: Lithium 3.6 V for memory retention

• Clock Synchronization: 1 ms accuracy across AC800M controllers via CNCP protocol

• Event Handling:

• Up to 3000 events per OPC client

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

• Communication Modules (CEX bus): Supports up to 12 modules, max 2.4 A supply current

• I/O Clusters:

• Non-redundant CPU: 1 electrical + 7 optical

• Redundant CPU: 7 optical

• I/O Capacity: Max 96 modules (single PM866) or 84 modules (redundant PM866)

• Modulebus Scan Rate: 0–100 ms depending on I/O configuration

• Ethernet:

• 2 channels, IEEE 802.3 standard

• 10 Mbit/s, RJ-45 (8-pole female)

• Control Network Protocols: MMS and IAC

• Recommended Backbone: 100 Mbit/s switched Ethernet

• Real-time Clock Stability: 100 ppm (~1 h/year)

• RS-232 Interfaces:

• 2 ports (general + service tool)

• COM3 (non-redundant only): 75–19,200 baud, RJ-45, full RTS-CTS support

• COM4 (non-redundant only): 9,600 baud, RJ-45, opto-isolated, no RTS-CTS support

Application Scenarios

• Distributed control in large-scale process industries

• Redundant CPU setups for mission-critical automation

• OPC-based event-driven control systems requiring high throughput

FAQ

Q: What is the maximum I/O capacity supported by PM866?  A: Up to 96 modules in single CPU mode, or 84 modules in redundant configurations.

Q: How fast is the redundancy switch-over?  A: The PM866 achieves switch-over times of less than 10 ms.

Q: What communication protocols are supported?  A: MMS and IAC, with Ethernet IEEE 802.3 standard interfaces.

Q: How does PM866 compare to PM864?  A: PM866 offers higher I/O capacity and enhanced redundancy features compared to PM864.