Product Details：

Honeywell 51196727100 (51196727-100, Classic CE Dual Node Module) is a rack plug-in dual-node processor board for Honeywell TDC3000 legacy DCS system,designed for redundant continuous process control,its main purpose is executing closed PID control,interlock logic,calculation algorithm and batch sequence for two independent control nodes inside one rack. This dual-node CPU is the upgraded CE version,optimized for stable operation under heavy industrial interference conditions. It receives field analog and digital signals transmitted from PLCI I/O boards and paddle boards through the backplane bus,completes control strategy calculation,judges alarm conditions and sends output commands back to field instruments to drive regulating valves and solenoid actuators. It communicates with LCN network through NIM gateway module,uploading real-time process values,alarm messages and trend data to operator stations for monitoring and operation. It supports hot standby redundant configuration,when the primary control node fails,the standby node can realize bumpless switchover automatically to avoid interruption of critical production loops. It adopts independent memory backup circuit for each node,preserving control configuration and event records when rack power supply is lost. It continuously monitors hardware watchdog,memory parity state,backplane bus communication and node synchronization signal,recording timestamped fault logs and uploading hardware failure alarm information to LCN operator station for maintenance troubleshooting. It supports hot swap under lockout-tagout maintenance procedures to reduce shutdown risk of continuous control loops. It is a scarce original spare core processor board for old TDC3000 CE rack projects,matched with dual node power supply,clock source board and NIM network interface module.

Key specifications：Rack plug-in dual-node CPU board for TDC3000 CE chassis,two independent control processing cores,supports redundant bumpless transfer,proprietary backplane bus interface. Operating temperature range is 0°C to +60°C. It supports parity error,bus communication timeout,node synchronization loss and watchdog fault diagnosis. The PCB is conformal coated for dust and moisture resistance. Front panel LED indicators display active/standby status,run signal and fault warning for quick on-site inspection.

This dual node processor module is widely deployed in petrochemical,chemical,power generation and water treatment plants for legacy TDC3000 DCS CE control rack reconstruction and spare replacement projects. It cooperates with Honeywell NIM gateway,UCN communication cable and HM history module to build a complete LCN+UCN distributed control architecture. As a core unit for dual node CPU and redundant control processor,it is the core logic calculation hardware of TDC3000 Classic CE redundant control rack. Clearly defined edge connectors simplify rack installation,control logic download test and periodic redundant switchover performance verification work for control engineers.