ABB PM858K02 AC800M CPU Controller Module

PM858K02 is a high‑performance CPU controller module for ABB AC 800M DCS system, compatible with System 800xA platform. Based on PowerPC architecture, it executes complex process control logic, handles mass I/O data processing, and supports full CPU redundancy for high‑availability critical industrial control systems.

Equipped with dual Ethernet ports and dual serial communication interfaces, this controller adopts slide‑lock DIN‑rail installation. It supports CompactFlash storage, real‑time clock and rich onboard LED diagnosis indicators, widely deployed in power plant, petrochemical and large‑scale process‑industry automation cabinets.

Main Specifications

• Brand: ABB; Model: PM858K02; Series: AC 800M Controller
• Applicable Platform: System 800xA, Compact Control Builder
• Memory: 256 MB RAM, CompactFlash card slot for program and data storage
• Communication Ports: 2×RJ45 Ethernet, COM3 RS232C, COM4 isolated configuration serial port
• Redundancy Function: Supports complete CPU redundancy, CEX‑Bus and S800 I/O redundant operation
• Installation: DIN‑rail slide‑lock mounting, matched with TP830 base plate
• Power Supply: 24VDC power input supplied by base plate
• Operating Environment: 0℃ ~ +60℃ working temperature, 5%‑95% RH non‑condensing, industrial anti‑vibration grade
• Diagnostic: Multi‑channel LED indicators for running, fault and communication status, INIT reset button
• Certifications: CE, UL, complies with global process‑automation industry standards

Core Functions

• Run industrial control application programs, implement logic control, PID closed‑loop regulation and advanced process‑control algorithm computation.
• Realize high‑speed data interaction with S800 I/O modules, collect field sensor signals and output control commands to field actuators.
• Dual Ethernet ports support control network communication, connecting HMI, SCADA and other upper‑level monitoring host systems.
• Full CPU redundancy function realizes bumpless master‑standby switchover, improving system reliability for non‑stop production scenarios.
• CompactFlash interface supports program backup, firmware upgrade and historical event data storage for equipment audit analysis.
• Onboard LED status indicators help maintenance staff quickly locate hardware, communication and program‑running faults.

Application Scenarios

• CPU spare replacement for ABB AC 800M DCS cabinets used 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, waste‑heat power generation and new‑energy power‑plant auxiliary‑control cabinets.
• Matching CPU module cooperating with TP830 base plate, S800 I/O modules and communication interface modules.
• Retrofit replacement for aging DCS control systems suffering CPU crash, program‑abort and communication‑interruption faults.
• Global aftermarket spare supply for automation maintenance teams maintaining ABB System 800xA automation equipment worldwide.