The CPU board integrates the main microprocessor, RAM memory, real-time clock, status LED indicators, an INIT push button, and a CompactFlash interface for storage and firmware handling.

The PM866 / PM866A controller baseplate is equipped with:

Two RJ45 Ethernet ports (CN1, CN2): Used for Control Network connectivity.

Two RJ45 serial ports (COM3, COM4):

COM3: RS-232C with full modem control signals.

COM4: Electrically isolated, dedicated for configuration tools.

The controller supports full CPU redundancy, covering the CPU module, CEX-Bus, communication interfaces, and S800 I/O, ensuring high system availability in critical process applications.

Mechanical Design & Identification

The unit features simple DIN-rail installation through ABB’s slide-and-lock mechanism, enabling fast attachment and removal.
Each base plate carries a unique hardware Ethernet address, providing a permanent physical identity for the controller. The address is printed on the label attached to the TP830 base plate.

Key Features and Benefits

ISA Secure Certified: Ensures compliance with international cybersecurity and robustness standards.

High Reliability: Simplified diagnostic procedures support rapid fault identification and recovery.

Modular Architecture: Allows scalable, step-by-step system expansion.

IP20 Protection Class: Enables open installation without requiring an enclosure.

800xA Control Builder Compatible: Fully configurable using ABB’s standard engineering tools.

Comprehensive EMC Certification: Ensures reliable operation in industrial electromagnetic environments.

Sectioned CEX-Bus: Implemented with BC810 / BC820 units for flexible system segmentation.

Industry-Standard Connectivity: Hardware design fully aligned with Ethernet, PROFIBUS DP, and other automation communication standards.

Built-in Redundant Ethernet Ports: Ensures continuous network availability and improved system resilience.