Overview
Manuals
Memory Allocation
Non-Redundant Controller Layout
Interface and I/O
Features:
- 24 MHz PM856A processing with 16 MB RAM and 10.337 MB available for application execution
- 2 integrated Ethernet channels plus support for 12 CEX-Bus communication modules in the documented controller layout
- Non-redundant CPU operation and maximum 96 non-redundant i/o modules through the verified ModuleBus arrangement
ABB identifies PM856AK01 3BSE066490R1 as a 24 MHz PM856A processor unit in the AC 800M controller family. It provides 16 MB RAM, including 10.337 MB available for the application, and uses the MPC860 processor architecture documented by ABB. The unit supports 2 Ethernet channels, up to 12 CEX-Bus communication modules and maximum 96 non-redundant i/o modules. This version is intended for non-redundant CPU configurations. Selection must be based on the complete 3BSE066490R1 article number, CPU type, control-software version and installed bus configuration.
Technical values are taken from ABB AC 800M controller and processor-unit documentation. Final compatibility is confirmed against article number 3BSE066490R1, the installed controller nameplate and the project hardware configuration.
The ABB PM856AK01 3BSE066490R1 AC 800M processor unit is supported by Moore Automated for verified industrial replacement and spare-part requirements.
ABB PM856AK01 3BSE066490R1 AC 800M processor unit manual(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
PM856A Memory Allocation
PM856A combines 24 MHz processing with 16 MB RAM and 10.337 MB available for the application.
Non-Redundant Controller Layout
This processor does not support CPU redundancy, so confirm the project is engineered for a single controller before supply.
Interface and I/O Planning
Review both Ethernet channels, the CEX-Bus population and the local ModuleBus capacity against the saved hardware configuration.
