TheABB PM856AK01 (STU3BSE069514R1)is a specialized processor unit designed for single-configuration control within the AC 800M ecosystem. Built on the PM856A hardware platform, this unit features enhanced packaging and an integrated baseplate, making it a reliable and space-efficient choice for mid-range industrial automation tasks.
Technical Specifications
Manufacturer:ABB
Article Number:STU3BSE069514R1(PM856AK01)
Processor:MPC860 RISC, 48 MHz
Memory:16 MB SDRAM / 2 MB Flash PROM
I/O Capacity:Up to 12 S800 I/O units (via electrical ModuleBus)
Battery Backup:118 hours (Internal); support for external SB821/SB822
Ethernet Ports:2x 10Base-T (CN1, CN2)
Serial Ports:COM3 (RS-232C w/ modem), COM4 (Isolated RS-232C)
Power Supply:24 V DC (19.2–30 V DC)
Dimensions:119 mm (W) x 186 mm (H) x 135 mm (D)
Weight:1100 g
Key Features
Efficient Processing Performance:The 48 MHz RISC processor provides the necessary computational power for standard process control and discrete logic.
Integrated Storage:Includes a built-in CompactFlash interface, allowing for local application storage and simplified firmware updates.
Reliable Data Retention:Features a robust internal battery backup (minimum 118 hours) to protect application memory during power loss.
Versatile Connectivity:Equipped with dual Ethernet ports for network communication and a dedicated isolated serial port (COM4) for safe service tool interfacing.
Modular Expansion:Directly supports a localized cluster of up to 12 S800 I/O modules, reducing the need for additional communication hardware in smaller setups.
Ruggedized Design:The "AK" variant signifies enhanced packaging for improved durability in industrial environments.
