TheABB PM858AK02is a specialized processor unit kit for the AC 800M control system. As part of the PM858A series, it features an MPC860 RISC microprocessor and 16 MB of SDRAM. This kit is designed for high-reliability industrial automation, offering robust I/O management and diverse communication options in a factory-enhanced package.
Technical Specifications
Manufacturer:ABB
Model:PM858AK02
Processor:MPC860 RISC, 48 MHz
Memory:16 MB SDRAM; 2 MB Flash PROM
Battery Backup:36 hours (Internal); up to 3 weeks with external SB821
Ethernet Ports:2x 10Base-T (CN1, CN2)
Serial Ports:COM3 (RS-232C w/ modem signals), COM4 (Opto-isolated for service)
I/O Capacity:Up to 12 S800 I/O units via electrical ModuleBus
Power Supply:24 V DC (19.2 – 30 V DC)
Power Dissipation:6 W (Typical)
Dimensions:119 x 186 x 135 mm
Weight:2800 g
Key Features
High-Performance Processing:The 48 MHz RISC architecture provides rapid execution of complex control logic and boolean operations.
Versatile Memory Protection:Maintains application data integrity via internal battery backup, with extended support through external battery units (SB821/SB822).
Isolated Communication:COM4 is opto-isolated, protecting the processor unit from electrical noise and ground loops during configuration and service.
Scalable I/O Architecture:Directly supports a significant local I/O footprint of up to 12 S800 modules using the integrated electrical ModuleBus.
Redundancy Ready:While used in single configurations, it is part of the redundancy-capable PM858 family, ensuring hardware consistency across the plant.
