PM861AK01 3BSE018157R1 ABB Programmable logic controller (PLC) CPU module

Product Overview

ABB PM861AK01 (Model: 3BSE018157R1) is a cost-effective CPU module in ABB AC 800M series programmable logic controllers (PLCS), specifically designed for small and medium-sized industrial automation and process control applications. As the basic controller of the AC 800M system, PM861AK01 maintains ABB industrial-grade reliability while providing sufficient processing power and communication functions, making it suitable for projects that are cost-sensitive but require long-term stable operation.

Core features

Series belonging: ABB AC 800M series
Processor architecture: 32-bit RISC processor, with an instruction execution speed of 0.15 microseconds per Boolean instruction, meeting the requirements of conventional control logic
User program memory: 2 MB Flash, supporting application storage of typical scale
Data memory: 2 MB RAM, supporting runtime data processing, and an optional battery module for power-off retention
I/O expansion capability: Supports up to 8,000 I/O points (a mixture of digital and analog quantities), and can connect up to 12 remote I/O stations, flexibly networking via Profibus DP or AC 800M bus
Communication interface configuration
Single Ethernet port (Ethernet) : 10/100 Mbps adaptive, RJ45 interface, natively supports Modbus TCP and AC 800M dedicated protocols
Serial communication port: RS-232/RS-485 (DB9 interface), used for local debugging, parameter download or connection to Modbus RTU devices
Power supply mode: Directly powered by AC 800M backplane bus (+ 5V and + 24V), no external auxiliary power supply is required

Typical application scenarios
Automatic start-stop and interlock control of small pumping stations or booster stations
Management of fans, valves and temperature control logic in building HVAC systems
Sequence control of light industry manufacturing production lines such as packaging and filling
Monitoring and alarm for auxiliary systems of solar power stations or substations
As a local sub-station controller in a large-scale system, it works in coordination with the main CPU

Compatibility Description

The PM861AK01 is fully compatible with ABB S800 and S900 series remote I/O modules and can be integrated with third-party devices via Profibus DP or Modbus protocols. Its programming and configuration are accomplished through ABB Control Builder M software, fully supporting IEC 61131-3 standard languages (including ladder diagram LD, Function block diagram FBD, structured text ST, etc.), enabling engineers to quickly get started and develop efficiently.

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