ABB PM864A 3BSE018162R1 AC800M Controller CPU Module

PM864A (3BSE018162R1) is a high‑performance central processing unit for ABB AC 800M DCS control system. It executes control logic programs, handles field I/O data processing, and supports multiple industrial communication interfaces to realize closed‑loop process control for power, chemical and manufacturing plants. It serves as the core computing unit of the AC800M controller rack.

This rack‑mounted CPU module is equipped with multiple Ethernet ports and supports redundancy configuration. The conformal‑coated PCB adapts to harsh industrial cabinet environments. It supports hot‑swap maintenance, works with S800 I/O series modules, and can realize program backup with SB822 battery unit to prevent data loss during power failure.

Main Specifications

• Brand: ABB; Model: PM864A, Part No: 3BSE018162R1; Series: AC 800M DCS Controller
• Processor: High‑speed 32‑bit real‑time processor, supports redundant dual‑CPU operation
• Memory: Built‑in program memory and data memory, supports SB822 battery for data retention during power‑off
• Communication Interfaces: Multiple 10/100Mbps Ethernet ports, support ControlNet, Modbus‑TCP, Profibus‑DP and other protocols
• I/O Bus: Compatible with S800 I/O fieldbus, connects various analog and digital I/O modules
• Power Supply: Powered by controller rack backplane, typical power consumption 6.5W
• Installation: Standard AC800M rack slot installation, cabinet IP20 protection rating
• Operating Environment: 0℃ ~ +60℃ working temperature, 5%‑95% RH non‑condensing, anti‑vibration industrial grade
• Diagnostic Indicators: Multi‑group front‑panel LED indicators for running, fault, communication and redundancy status
• Certifications: CE, UL, compliant with global process automation industry standards

Core Functions

• Run user‑defined control programs, complete logic judgment, PID closed‑loop regulation and sequence control for industrial process equipment.
• Realize data interaction with S800 I/O modules, collect field sensor signals and output control instructions to on‑site actuators.
• Multi‑Ethernet interfaces realize data exchange with HMI, SCADA upper monitoring system and third‑party field bus instruments.
• Supports dual redundant CPU configuration to realize seamless master‑standby switch and improve system operation reliability.
• Cooperate with SB822 battery module to realize power‑off data backup, avoid program and parameter loss caused by power failure.
• Hot‑swap modular design allows module replacement without shutting down the whole system, reducing plant equipment maintenance downtime.

Application Scenarios

• CPU spare replacement for ABB AC 800M DCS cabinets in thermal power plants and combined‑cycle power stations.
• Main control unit for petrochemical plants, chemical process production lines and large‑scale metallurgical automation control systems.
• Maintenance backup inventory for water‑treatment automation, waste‑heat power generation and new‑energy power plant auxiliary control cabinets.
• Matching CPU module paired with AC800M rack, S800 I/O modules, communication modules and SB822 battery units.
• Retrofit replacement for aging DCS control systems suffering CPU crash, logic execution error and communication abnormal faults.
• Global aftermarket spare supply for automation maintenance teams managing ABB AC 800M control equipment worldwide.