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ABB PM851K01 3BSE018168R1 Processor Unit Kit

1. Product Description

The ABB PM851K01 3BSE018168R1 is a high-performance processor unit kit designed as the core control component of ABB’s AC 800M Distributed Control System (DCS). It integrates a powerful central processing unit (CPU), on-board memory, and essential communication interfaces, responsible for executing control logic, processing real-time data from I/O modules (e.g., AI801, AO801), and communicating with upper monitoring systems. The kit typically includes the PM851 processor module, backup battery, and mounting accessories, ensuring quick deployment and stable operation in industrial automation scenarios. With strong computing power, multi-protocol compatibility, and redundant design support, it provides a reliable hardware foundation for medium-to-large-scale industrial process control (e.g., petrochemical, power generation).

2. Detailed Parameters

Parameter Category	Specifications
Model Number	PM851K01 (Order Code: 3BSE018168R1)
CPU Performance	32-bit RISC processor, up to 600 MHz clock speed
Memory Configuration	RAM: 512 MB DDR3; Flash Memory: 256 MB (for program storage)
Supported I/O Modules	Compatible with ABB AC 800M I/O family (AI801, AO801, DI801, DO802, etc.)
Communication Interfaces	2 × Ethernet (10/100/1000 Mbps, for DCS network); 1 × RS485 (for local debugging); 1 × backplane bus interface (for I/O module connection)
Redundancy Support	Optional 1:1 hot standby redundancy (with additional PM851 module)
Operating Temperature	-40°C to +70°C (operating); -40°C to +85°C (storage)
Power Supply	24 V DC (19.2-28.8 V DC); Typical power consumption: 15 W
Dimensions (W×H×D)	48.3 × 100 × 180 mm (processor module alone)
Mounting Method	DIN rail mounting (compatible with standard 35 mm DIN rails)
Certification	CE, UL, ATEX (for hazardous areas), IECEx

3. Advantages & Features

Powerful Computing Capacity: 600 MHz RISC CPU and large-capacity memory (512 MB RAM) enable fast execution of complex control logic (e.g., PID loops, sequential control) and real-time processing of hundreds of I/O signals.

Wide Compatibility: Seamless integration with ABB AC 800M I/O modules (analog/digital input/output) and third-party devices via standard protocols (Modbus, Profinet), reducing system integration complexity.

Redundancy for Reliability: Supports 1:1 hot standby redundancy—if the primary processor fails, the standby unit takes over within milliseconds, ensuring zero downtime for critical industrial processes.

Robust Environmental Adaptability: Operates in -40°C to +70°C wide temperature range and resists electromagnetic interference (EMI), suitable for harsh industrial sites (e.g., offshore platforms, steel mills).

Easy Maintenance & Upgrade: Modular design allows on-site replacement without system disassembly; software updates can be completed via Ethernet, minimizing maintenance workload.

4. Application Fields

Petrochemical Industry: Serving as the core controller for oil refineries, chemical plants, and natural gas processing facilities—controlling reaction processes, pipeline transportation, and storage tank level regulation.

Power Generation: Managing thermal power plants, nuclear power auxiliary systems, and renewable energy (solar/wind) farms—regulating turbine speed, boiler combustion, and grid-connected power control.

Marine & Offshore: Controlling shipboard automation systems (e.g., propulsion, navigation, cargo handling) and offshore oil drilling platforms—withstanding salt spray, vibration, and extreme temperature changes.

Metallurgical Industry: Overseeing steel mills, aluminum smelters, and copper processing plants—managing blast furnace temperature, rolling mill speed, and material handling conveyor systems.

5. Precautions

Ensure the power supply voltage is within 19.2-28.8 V DC; overvoltage or reverse polarity may damage the processor’s internal circuit.

When configuring redundancy, use identical PM851K01 modules (same firmware version) and ensure synchronous wiring of power and communication cables to avoid redundancy failure.

Install the processor in a dustproof, waterproof cabinet (IP54 or higher) in humid or dusty environments; maintain at least 10 cm clearance around the module for heat dissipation.

Avoid connecting unauthorized devices to the processor’s communication ports (Ethernet/RS485) to prevent network attacks or signal interference.

Regularly back up control programs and configuration data to the upper system; replace the backup battery every 2-3 years to prevent program loss during power outages.

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