ABB PM866A 3BSE076359R1 | AC 800M High-Performance CPU for System 800xA | In Stock

Description

Product Core Brief

• Model: PM866A
• Order code: 3BSE076359R1
• Brand: ABB
• Series: ABB AC 800M / System 800xA control system family
• Core Function: High-performance processor unit for AC 800M controllers, executing deterministic control programs, managing S800 I/O via ModuleBus, and providing Ethernet connectivity for engineering, operator stations, and plant networks.
• Product Type: Processor module / CPU controller
• Key Specs: 240 MHz processor | 32 MB RAM | 2× 10/100 Mbit/s Ethernet ports | 2× RS-232C serial ports | CompactFlash card slot | CEX-bus expansion for up to 12 communication modules | supports CPU redundancy | connects to S800 I/O via TP830 baseplate
• Condition: New Original / New Surplus

Key Technical Specifications

• Order code: 3BSE076359R1
• Product designation: PM866A processor unit
• System family: ABB AC 800M / System 800xA
• Processor: Industrial-grade CPU, 240 MHz clock frequency
• Memory: 32 MB RAM
• Power supply: 24 VDC nominal (19.2–30 VDC), supplied via AC 800M base unit, typical power consumption ~15 W
• Communication interfaces: 2× RJ45 Ethernet ports (CN1, CN2) for control network; 2× RS-232C serial ports (COM3 with modem control signals, COM4 isolated for configuration tool)
• Fieldbus expansion: Supports PROFIBUS DP, FOUNDATION Fieldbus HSE, Modbus TCP, MasterBus 300, IEC 61850, and other protocols via CEX-bus communication interface modules (CI8xx series), up to 12 modules
• I/O architecture: No onboard I/O; connects to S800 I/O through ModuleBus on TP830 baseplate; supports electrical and optical ModuleBus expansion
• Redundancy: Supports CPU redundancy configurations (hot-standby with automatic failover), including redundant CPU, CEX-bus, communication interfaces, and S800 I/O
• Storage: CompactFlash card slot for application and firmware storage
• Operating temperature: 0 to +50 °C (typical)
• Mounting: DIN-rail mounting via TP830 baseplate
• Typical applications: Power generation (boiler control, turbine control), oil and gas, chemical processing, water treatment, metallurgy, and large-scale distributed process automation
• Note: 3BSE076359R1 is the CPU unit order code; kit versions such as PM866AK01 (3BSE076939R1) and PM866AK02 (3BSE081637R1) include baseplates, cables, and batteries. Exact firmware version and system compatibility should be confirmed from the unit nameplate.

Product Introduction

The ABB PM866A 3BSE076359R1 is a high-performance processor module designed for the ABB AC 800M control system architecture. It serves as the core controller in distributed automation applications, executing deterministic control programs, coordinating I/O data exchange through the TP830 baseplate and S800 I/O modules, and providing Ethernet-based connectivity for plant networks and engineering access.

The PM866A features a 240 MHz industrial-grade processor with 32 MB of RAM, offering higher processing speed than the PM864/PM865 series. The module includes two 10/100 Mbit/s Ethernet ports for control network communication and two RS-232C serial ports, with COM4 isolated for configuration tool connection. A CompactFlash card slot provides non-volatile storage for applications and firmware, enabling controller recovery

after power interruptions.

The PM866A supports CPU redundancy configurations, allowing two units to operate in a hot-standby arrangement for higher system availability. Redundancy extends to CEX-bus communication modules and S800 I/O, providing comprehensive fault tolerance. Fieldbus connectivity such as PROFIBUS DP, FOUNDATION Fieldbus HSE, Modbus TCP, and IEC 61850 can be added through ABB CI8xx communication interface modules on the CEX-bus, with support for up to 12 modules.

This module is not a standalone PLC and must be installed as part of a compatible AC 800M / System 800xA system with a TP830 baseplate. Before replacement, always confirm the existing system configuration, firmware version, communication interface modules, and connected S800 I/O arrangement.

QA & Testing SOP

1. Order code verification: Confirm PM866A and 3BSE076359R1 on the nameplate.
2. Visual inspection: Check the module housing, Ethernet ports, serial ports, CompactFlash slot, and mounting hardware for damage or corrosion.
3. Power-up test: Install the module into the correct TP830 baseplate position, apply 24 VDC supply, and verify normal start-up without fault indicators.
4. Communication check: Verify Ethernet connectivity on both ports and serial port communication via COM3/COM4.
5. System test: Confirm program download/upload capability, S800 I/O communication, redundancy status if applicable, and stable controller operation within the AC 800M / System 800xA environment.

Installation Pitfalls & Guide

❗ Confirm system compatibility. PM866A is designed for the ABB AC 800M / System 800xA architecture with TP830 baseplate. It cannot be directly substituted into AC 800F / Freelance or other ABB controller families.

❗ Distinguish between CPU unit and kit. 3BSE076359R1 is the CPU unit only. Kit versions (PM866AK01/PM866AK02) include baseplates, CEX-bus cables, RCU-Link cables, and backup batteries.

❗ Record existing configuration. Before removal, save the controller program, firmware version, communication module configuration, and baseplate slot assignment.

❗ Verify CompactFlash card. Ensure the CompactFlash card is present and contains the correct application. The card is essential for controller recovery after power loss.

❗ Check redundancy configuration. If the system uses CPU redundancy, confirm that both primary and secondary units are properly configured and synchronized before replacing either module.

❗ Follow proper grounding practices. Ensure correct grounding and shielding to minimize electromagnetic interference in industrial environments.

Replacement steps:

1. Pre-install: Back up the existing controller program, note the firmware version, communication configuration, and slot position.
2. Removal: Follow safe shutdown procedures, disconnect power if required, then remove the processor module.
3. Install: Insert the PM866A into the correct TP830 baseplate position, verify all connectors, and confirm proper seating.
4. Commissioning: Power up the system, confirm normal startup, verify Ethernet and fieldbus communication, check S800 I/O status, validate redundancy if applicable, and confirm process control operation before returning to production.

Technical FAQ

Is 3BSE076359R1 the correct order code for PM866A? Yes, 3BSE076359R1 is the order code for the ABB PM866A processor unit. Note that kit versions have different order codes: PM866AK01 is 3BSE076939R1 and PM866AK02 is 3BSE081637R1.

What is the difference between PM866A and PM866? The “A” suffix indicates a hardware upgrade with optimized bus bandwidth, memory, and redundancy switchover performance.

What system is PM866A used in? It is designed for the ABB AC 800M control system and integrates with System 800xA environments, using S800 I/O and CEX-bus communication interface modules.

Does PM866A support redundancy? Yes. PM866A supports CPU redundancy configurations for higher availability in critical process applications, with automatic failover.

Does PM866A have onboard I/O? No. PM866A has no onboard discrete or analog I/O by design. Field I/O is handled through S800 I/O modules connected via the TP830 baseplate ModuleBus.

Can PM866A be used for safety (SIL) applications? PM866A is not a high-integrity safety CPU. For SIL2/SIL3 applications, the PM865 series with SM81x safety monitor modules should be used instead.

Do you offer price flexibility? Yes. Pricing depends on condition, firmware visibility, quantity, and urgency. New original stock and tested surplus units are quoted separately.

What warranty is included? Typical coverage is 12 months from delivery for functional defects, excluding incorrect installation, firmware mismatch, communication configuration errors, or damage from improper handling. Final terms are confirmed on the quotation.