Product Overview

The ABB PM861 (3BSE018129R1) is a processor unit within the AC 800M control platform, designed for high-performance industrial automation. Acting as the “brain” of the control system, it executes control logic, manages communication with field devices, and ensures reliable operation in demanding environments.

Key Specifications

General Information

• Brand: ABB

• Model: PM861

• Product ID: 3BSE018129R1

• Product Type: Processor Unit

Memory

• RAM: 16 MB (7.155 MB available for user applications)

• Flash Memory: 2 MB (for firmware storage)

Power Requirements

• Operating Voltage: 24 V DC

• Typical Consumption: 250 mA

• Maximum Consumption: 430 mA

• Power Dissipation: 6.0 W (max. 10.3 W)

Communication Interfaces

• Ethernet: 10 Mbit/s, RJ-45 connector

• RS-232C: Two ports — one for general use, one for service tools

• Supported Protocols: MMS, IAC control network protocols