ABB PM861AK01 3BSE018157R1 AC800M Single Ethernet CPU Controller

Product Description

PM861AK01 with code 3BSE018157R1 is basic CPU for ABB AC800M and System 800xA DCS, equipped with 32-bit RISC processor and 8MB memory.

It integrates single 10/100Mbps Ethernet and RS232 port, supports Modbus TCP/RTU and mainstream industrial protocols. It handles logic control, PID regulation and regular data collection, 

compatible with all S800 I/O modules. With conformal coated PCB and front fault indicators, it serves as common replacement spare for small chemical, water treatment and auxiliary power control racks.

Technical Specifications

Part No.: PM861AK01, Material Code: 3BSE018157R1

Brand: ABB, Origin: Switzerland

Processor: 32-bit RISC industrial CPU

Application Memory: 8MB

Max I/O Points: Up to 2000 mixed digital & analog signals

Communication Interfaces

1 × 10/100Mbps RJ45 Ethernet port

RS232 service port for program download & diagnosis

Supported Protocols: Modbus TCP, Modbus RTU, Profibus DP, ABB native control protocol

Programming Standard: IEC 61131-3 (ST, LD, FBD, SFC)

Backplane Bus: CEX bus for AC800M I/O expansion

Power Supply: Supplied via rack backplane

Operating Temperature: 0℃ ~ +60℃ full load

Storage Temperature: -40℃ ~ +70℃

Humidity: 5%–95% non-condensing, conformal coated PCB

Protection Class: IP20 cabinet installation only

Mounting: Single slot plug-in with matching TP830 baseplate

Net Weight: Approx. 1.2kg

Certifications: CE, UL industrial compliance

Key Features

Compact 8MB memory high-speed RISC processor, stable for small and medium-scale process control and simple data logging.

Independent Ethernet port connects HMI and SCADA systems for real-time process data transmission.

Multi-protocol compatibility enables seamless connection with inverters, analyzers and third-party remote RTU devices.

RS232 local debug port supports firmware upgrade, parameter backup and offline fault analysis on site.

Front panel LED indicators display power, bus link and hardware fault status for quick on-site troubleshooting.

Dedicated TP830 baseplate simplifies rack wiring and supports hot-swap under appropriate system configuration.

Full compatibility with all AC800M series I/O, communication and safety modules for flexible system expansion.

Anti-vibration conformal coated PCB, stable 24/7 continuous operation in dusty and humid industrial control rooms.