Product Details

The XYCOM 81945F is a discontinued rack-mounted embedded CPU board designed for legacy XYCOM DCS and process automation control systems. It serves as the core field controller to execute real-time control algorithms, process analog and digital I/O signals, manage communication protocols and coordinate all peripheral I/O modules on the system backplane. This controller integrates flash EPROM storage preloaded with abundant control function blocks, supporting standard IEC 61131-3 programming and extended arithmetic, loop regulation, sequence control and monitoring subroutines for flexible configuration of complex closed-loop control strategies. It supports multiple mainstream industrial communication protocols including Modbus, TCP/IP and IEC870-5 telecontrol protocol, which can exchange data with remote SCADA host, PLC, HMI and other third-party automation devices through serial or Ethernet ports. It can also realize long-distance data transmission via dial-up or satellite communication interfaces for remote unattended monitoring sites. The board carries built-in memory for real-time data buffering and parameter storage, with battery-backed non-volatile memory to retain setpoints, calibration parameters and event logs during power interruption. Users can set station address, baud rate, communication mode and interrupt resources through on-board DIP switches and jumpers to avoid network and bus resource conflicts in multi-node distributed control systems. The front panel is equipped with LED indicators for power status, CPU running heartbeat, communication link and fault alarm, helping maintenance technicians quickly locate communication timeout, program exception and bus failure during commissioning and daily inspection. The PCB adopts industrial-grade components and complete EMC filtering and surge suppression design, which can resist electromagnetic interference, vibration and dust in power plants, chemical plants and oil & gas sites for stable long-term continuous operation. This legacy control CPU board is mainly supplied as spare replacement parts for existing XYCOM distributed automation systems. Users need to confirm firmware version, backplane definition and communication parameter matching before installation. A conformal coated version is optional for high humidity, corrosive industrial environments. This model is widely used in power distribution monitoring, chemical process control, oil and gas pipeline supervision and old DCS system renovation projects.

This embedded CPU board adopts standard single-slot rack board structure. It draws power from the control system backplane. LED indicators display power status, CPU activity and communication status for convenient on-site inspection. The operating temperature range is 0°C to 50°C, storage temperature ranges from -40°C to 85°C, relative humidity 5% to 95% non-condensing. It complies with industrial shock, vibration and EMC standards and has CE certifications. It supports control program and communication configuration backup for fast recovery after hardware replacement.

This XYCOM 81945F embedded control CPU board is widely applied in legacy DCS control racks and distributed process monitoring retrofit projects. It undertakes local real-time control and protocol conversion tasks for field automation systems. As a reliable discontinued spare part, the XYCOM 81945F retains original control logic and protocol compatibility, and effectively reduces the renovation cost of legacy industrial control system maintenance.