PM856AK (3BSE066490R1) ABB AC 800M Processor Unit

Overview

The ABB PM856AK (3BSE066490R1) is a compact and efficient processor unit designed for the AC 800M control system family. Operating at 24 MHz with 16 MB of memory, it provides stable performance for distributed control and process automation tasks. This unit enables flexible configuration and high reliability for medium-scale applications requiring consistent communication and control integrity.

Package Contents

• PM856A CPU module

• TP830 Baseplate for mounting

• TB850 CEX-bus terminator

• TB807 ModuleBus terminator

• 4943013-6 Backup battery for memory retention

• No license included

Technical Specifications

• Model Number: PM856AK

• Part Number: 3BSE066490R1

• Manufacturer: ABB

• Series: AC 800M

• Processor Speed: 24 MHz

• Memory Capacity: 16 MB

• Product Type: Central Processor Unit

• Net Weight: 1.1 kg

• Dimensions (W × H × D): 130 mm × 200 mm × 155 mm

• Customs Tariff Number: 85371091

• HS Code Description: Boards and panels for electrical control and distribution under 1000 V

• Dangerous Goods Classification: UN3091-PI970, Class 9

• Battery Type: Portable lithium battery

• Battery Quantity: 1

• Battery Weight: 9 g

• RoHS Compliance: Conforms to EU Directive 2011/65/EU

• WEEE Category: 5 – Small Equipment (No external dimension over 50 cm)

Application Scenarios

The PM856A processor unit is suitable for:

• Industrial process control systems using AC 800M architecture

• Power generation, water treatment, and chemical process control

• Automation systems requiring stable communication and moderate data processing capability

FAQ

Q: What distinguishes the PM856A from the PM860K01 processor unit?
A: The PM856A is a lower-performance CPU with a 24 MHz clock and 16 MB memory, suitable for medium-sized control applications. The PM860K01, in contrast, supports higher processing capacity and redundancy for more complex systems.

Q: Is the PM856A compatible with all AC 800M modules?
A: Yes, it integrates seamlessly with AC 800M I/O and communication interfaces such as CI854A, CI855, and CI856 modules.