Description

The ABB PM851K01 3BSE018168R1​ (commonly referred to as Processor Unit Kit 1) is a complete controller kit designed for the AC 800M​ family. It serves as the central processing unit (CPU) in distributed control systems (DCS) and advanced PLC applications. The kit includes the PM851 / PM851A​ processor module pre-assembled on a TP830​ baseplate, along with necessary terminators and a memory backup battery. Powered by a 32-bit RISC processor and featuring integrated Ethernet and serial communication ports, it is engineered for reliability in demanding industrial environments such as power generation, oil & gas, and water treatment plants.

Application Scenarios

A system integrator was tasked with modernizing a municipal wastewater treatment plant’s control system. The legacy PLCs were struggling with complex PID loop control and lacked integration with the plant’s SCADA system. By deploying the ABB PM851K01 3BSE018168R1​ as the central controller, the integrator leveraged its native Ethernet port to establish a high-speed Modbus TCP/IP connection with the SCADA server. The module’s robust processing power efficiently handled the aeration basin’s dissolved oxygen control loops and sludge dewatering sequence logic. The inclusion of the backup battery in the kit ensured that critical process data and real-time clock settings were preserved during power outages, which was critical for regulatory compliance and batch reporting.

Parameter