{"product_id":"pm856ak01-abb-ac800m-cpu-with-compactflash-interface","title":"PM856AK01 ABB AC800M CPU with CompactFlash Interface","description":"\u003ch3\u003eProduct Overview\u003c\/h3\u003e\n\u003cp\u003eThe\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eABB PM856AK01 (Part Number: 3BSE066490R1)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003efunctions as the primary processing core for the AC800M distributed control system. This brand-new, original CPU unit integrates a high-performance microprocessor with 8MB of RAM and a dedicated real-time clock to manage complex automation logic. It serves as the central intelligence hub, coordinating data between the Control Network and I\/O subsystems. Designed for high-availability environments, the PM856AK01 supports redundant Ethernet communications and provides a modular CompactFlash interface for persistent data storage and firmware management.\u003c\/p\u003e\n\u003ch3\u003eTechnical Specifications\u003c\/h3\u003e\n\u003cp\u003eThe PM856AK01 utilizes a high-density base plate architecture to maintain the following technical parameters:\u003c\/p\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr class=\"firstRow\"\u003e\n\u003ctd\u003e\u003cstrong\u003eAttribute\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eSpecification Details\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eManufacturer\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eABB Group\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eModel \/ Part Number\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003ePM856AK01 \/ 3BSE066490R1\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eCondition\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e100% Brand New, Factory Original\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMemory\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e8 MB RAM\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMicroprocessor\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHigh-speed RISC processor\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eEthernet Ports\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e2 x RJ45 (CN1, CN2) supporting redundant Control Network\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSerial Ports\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003e1 x RS-232C (COM3), 1 x Isolated Configuration Port (COM4)\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eStorage Interface\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eCompactFlash slot for cold-start and data backup\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eUser Interface\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eIntegrated LED status indicators and INIT push button\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eMounting\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eDIN rail with Slide \u0026amp; Lock mechanism\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cspan\u003e\u003cstrong\u003eSecurity\u003c\/strong\u003e\u003c\/span\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cspan\u003eHardware identity via unique Ethernet address label\u003c\/span\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eEngineering Advantages\u003c\/h3\u003e\n\u003cp\u003eThe ABB PM856AK01 solves the challenge of\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003enetwork reliability and hardware identification\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003ein large-scale DCS deployments. Every TP830 base plate carries a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eunique factory-assigned Ethernet address\u003c\/strong\u003e, which grants each CPU a distinct hardware identity. This eliminates IP conflict risks during system initialization and simplifies asset tracking across the plant network.\u003c\/p\u003e\n\u003cp\u003eFor installation efficiency, the unit employs a\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eunique slide \u0026amp; lock mechanism\u003c\/strong\u003e. This allows technicians to attach or detach the controller from a DIN rail without tools, significantly reducing commissioning time in cramped control cabinets. The communication architecture incorporates\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003edual RJ45 Ethernet ports\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003e(CN1 and CN2) to provide physical redundancy; if one network segment fails, the controller maintains seamless communication via the secondary path. Additionally, the inclusion of an\u003cspan\u003e \u003c\/span\u003e\u003cstrong\u003eisolated serial port (COM4)\u003c\/strong\u003e\u003cspan\u003e \u003c\/span\u003eprotects the CPU during configuration. By isolating the tool connection from the internal system logic, the PM856AK01 prevents electrical surges from the PC or handheld device from damaging the primary processor, ensuring long-term operational uptime in harsh industrial environments.\u003c\/p\u003e\n\u003ch3\u003eFAQs\u003c\/h3\u003e\n\u003cp\u003e\u003cstrong\u003eHow do I perform a cold start on the PM856AK01?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYou utilize the INIT push button located on the front of the CPU board. Simultaneously pressing this button while inserting the CompactFlash card containing the system image allows the controller to reload its firmware and application logic from a known-good state.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the purpose of the two different serial ports (COM3 and COM4)?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCOM3 serves as a standard RS-232C port with modem control signals, typically used for connecting external peripheral devices or serial MODBUS communication. COM4 is specifically isolated for the connection of a configuration tool (Control Builder), providing an extra layer of electrical protection for the CPU during programming.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the PM856AK01 support memory expansion?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe unit features 8MB of built-in RAM for logic execution. For persistent storage, you can utilize the CompactFlash interface to store the application code, ensuring the controller retains its logic even after a total power failure or long-term storage.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCan I replace a PM856A with a PM856AK01?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The PM856AK01 is the modern version of the PM856A series. It maintains full backwards compatibility with existing AC800M base plates and software configurations, provided your 800xA or Control Builder version supports the hardware revision. Always verify the firmware compatibility before swapping units in a live process.\u003c\/p\u003e","brand":"ABB","offers":[{"title":"Default Title","offer_id":44106636165219,"sku":"PM856AK01 3BSE069514R1","price":676.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0583\/5246\/8067\/files\/418.1_f0af27c7-2c64-421a-a6a7-3c7f5a2ff2e0.jpg?v=1775636730","url":"https:\/\/www.autocontrolglobal.com\/products\/pm856ak01-abb-ac800m-cpu-with-compactflash-interface","provider":"AutoControl Global","version":"1.0","type":"link"}