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The ABB PM864 processor unit is a high‑performance CPU module designed for the ABB AC 800M / 800xA control system, widely used in complex industrial automation projects such as power generation, oil & gas, and large manufacturing lines. In this case, the ABB PM864 processor unit acts as the central controller, executing user programs, coordinating field I/O, and handling communication with higher‑level systems to ensure safe, stable, and efficient operation of the plant. By deploying multiple ABB PM864 modules in a redundant configuration, the control system achieves higher availability and minimizes downtime during critical continuous processes.

The ABB PM864 controller is installed on a DIN rail rack and integrated with S800 I/O modules through ModuleBus, providing flexible expansion of analog and digital signals for temperature, pressure, and flow control. Thanks to its powerful CPU, large application memory, and multiple Ethernet/serial interfaces, the ABB PM864 processor can handle complex logic, motion control, and real‑time data exchange between field devices and supervisory SCADA or DCS systems.

Model ABB PM864 processor unit (AC 800M / 800xA) 

ABB Part Number 3BSE018161R1 (typical for PM864 / PM864AK01) 

Processor type 32 bit high performance embedded CPU 

System / user Flash Approx. 1024 KB system, 512 KB user applications (typical) 

RAM (running memory) Approx. 1024 KB for program execution 

Application memory Large application memory for complex control tasks 

Power supply 24 V DC 

Operating temperature About −25/−40 ℃ to +70 ℃ (model dependent) 

Storage temperature About −40 ℃ to +85 ℃ 

Humidity 5–95% non condensing (typical) 

Mounting Standard DIN rail or rack mounting 

Protection class IP20 (typical for PM864) 

Ethernet channels 2 built in redundant Ethernet ports 

Serial interface Built  in RS  232C (and other ports depending on configuration) 

Supported fieldbuses Ethernet, PROFIBUS DP, FOUNDATION Fieldbus, Advant Fieldbus 100, Modbus TCP 

Max. CEX bus modules Up to 12 single CEX bus modules 

Typical weight Around 0.5–1.2 kg (depending on variant) 

Typical dimensions Approx. 280 × 80 × 105 mm or 5" × 5" × 5" class 

Power up and initialization

Ensure the ABB PM864 controller is correctly wired to 24 V DC power and properly grounded before energizing.

After power up, verify that all status LEDs on the ABB PM864 CPU indicate normal operation according to the product manual.

Program download and configuration

Use the ABB engineering tool (such as Compact Control Builder for AC 800M) to create or open the control application for the ABB PM864 controller.

Configure communication settings (IP address, fieldbus parameters, I/O modules) and download the application program to the ABB PM864 CPU.

I/O and fieldbus verification

Check that all S800 / external I/O modules are correctly recognized by the ABB PM864 controller and that process values are updated in real time.

Confirm communication with external systems (SCADA/DCS, HMIs, other controllers) via Ethernet or fieldbus interfaces.

Commissioning and monitoring

Run the application in test mode where possible, monitor key signals, and finetune control parameters on the ABB PM864 controller.

Once validated, switch to full operation and enable all interlocks, alarms, and protection logic implemented on ABB PM864.

Mechanical installation

Mount the ABB PM864 unit vertically on a suitable DIN rail or rack, leaving adequate ventilation space around the module.

Avoid installing the ABB PM864 controller near strong vibration, corrosive gases, or high temperature sources beyond its specified range.

Electrical wiring

Use correctly rated cables for 24 V DC power, and ensure proper grounding and shielding of communication lines to the ABB PM864 CPU.

Follow ABB wiring diagrams for ModuleBus and CEX bus connections so that the ABB PM864 can reliably interface with S800 I/O and expansion modules.

Environmental and EMC

Ensure the control cabinet meets IP and EMC requirements, and keep adequate clearance between the ABB PM864 module and high power devices.

Verify that ambient temperature and humidity meet the environmental specifications for ABB PM864 operation throughout the year.

Visual inspection

Regularly check the ABB PM864 controller for abnormal LED indications, loose terminals, or physical damage to the housing and connectors.

Inspect the cabinet for dust accumulation and ensure that cooling and ventilation around ABB PM864 remain unobstructed.

Cleaning and environment

Periodically clean dust from the ABB PM864 module and surrounding equipment using dry, nonstatic tools, avoiding liquid cleaners.

Confirm that temperature, humidity, and vibration levels remain within the ABB PM864 specified limits to prevent longterm degradation.

Functional checks

Use system diagnostics and logs provided by the ABB PM864 CPU to detect communication errors, I/O faults, or abnormal restarts.

Schedule periodic backups of the ABB PM864 application program and configuration, and verify that redundancy (if used) is functioning correctly.

Do you provide global shipping services?

Yes. We have local distribution centers on all continents, which can quickly transport parts to any corner of the world.

2. What payment methods and currencies do you accept?

To make your purchasing process as simple as possible, we offer multiple payment methods including bank transfer, check, and PayPal. Meanwhile, we also accept most mainstream credit and debit cards, such as Visa, Mastercard, and American Express. We can accept payments in most major currencies worldwide, but we recommend using US dollars (USD), British pounds (GBP), or euros (EUR) as a priority. Payments in other currencies may incur additional fees. All transactions are securely processed by HSBC Bank and HSBC Merchant Services.

How many parts do you currently have in stock?

We have a vast inventory of thousands of new, refurbished, and outdated automation components, including products from well-known manufacturers such as ABB and Schneider. If you cannot find the required parts, please do not worry. We work closely with a global network of professional suppliers to provide you with tailored quotes even if the part is not listed on our website.

Who can I contact if I encounter any problems?

Our experienced customer service team will handle any issues after you place your order.