Overview

The PM856K01 CPU Module is a high-performance processor kit from ABB’s AC 800M controller family, widely deployed in process automation, power generation, water treatment, and discrete manufacturing. It includes the PM856 CPU, baseplate, communication accessories, and termination hardware required for installation.

The controller provides dual Ethernet ports for Control Network (CN) and Plant Network (PN) communication, two serial interfaces for configuration or field device connectivity, and a CompactFlash slot for application storage. Moreover, it supports full CPU and communication redundancy, making it suitable for mission-critical applications where uptime and reliability are essential.

Technical Data

Typical Applications

• Process industries: Chemical, oil & gas, and pharmaceutical facilities requiring distributed I/O and robust control logic execution.

• Power generation: Turbine, boiler, balance-of-plant (BOP), and excitation system control with high availability.

• Water treatment: Supervising pumps, mixing stations, filtration units, and water quality instrumentation.

• Manufacturing automation: Centralized control for assembly lines, robotics, and machine coordination.

• Infrastructure systems: Building automation, utility monitoring, and municipal systems.

Example:
In a refinery, the PM856K01 can connect to multiple local and remote I/O clusters, enabling seamless real-time control of thousands of field signals across complex plant units.

FAQ

Q1: What is the ABB PM856K01 used for?
It is a CPU module for ABB’s AC 800M control system, responsible for executing control logic, communicating with networks, and managing local/remote I/O.

Q2: How many I/O stations can it connect to?
Up to 8 local I/O stations (non-redundant) and up to 98 remote stations via Profibus DP.

Q3: What communication interfaces are available?
Two Ethernet ports (CN1, CN2) and two serial ports (COM3 RS-232C, COM4 isolated).

Q4: Does it support redundancy?
Yes—supports redundant CPUs, redundant communication modules, and redundant I/O architectures.

Q5: How is the PM856K01 installed?
It uses a DIN-rail slide-and-lock mounting system for fast installation and maintenance access.