Product Details：

Honeywell 51196728100 (51196728-100) is the upgraded version of 51196727100 dual-node processor board for Honeywell TDC3000 Classic CE controller rack,its main purpose is executing continuous closed-loop PID regulation,interlock logic,calculation and batch sequence control for two independent control nodes inside one rack. This board optimizes the memory capacity and bus synchronization timing of the previous model,improving the stability of redundant bumpless transfer under heavy load of multi-point control schemes. It receives analog 4-20mA and digital contact signals uploaded from PLCI I/O boards and paddle boards through the backplane bus,completes control algorithm operation and alarm judgment,and outputs drive commands to field solenoid valves and regulating valve positioners. It communicates with LCN network through NIM gateway module,transmitting real-time process data,alarm messages and trend records to operator stations for monitoring and operation confirmation. It supports hot standby redundant architecture,when the primary node hardware fails,the standby node can automatically switch over without disturbing the production control loop. Each node adopts independent battery-backed memory circuit to preserve configuration and event records after power loss. It continuously monitors watchdog circuit,memory parity status,backplane bus communication and dual-node synchronization signals,recording timestamped fault logs and uploading hardware abnormal alarm information to LCN operator station for maintenance troubleshooting. It supports hot swap under lockout-tagout maintenance procedures to reduce production shutdown risk. It is a scarce original spare processor board for legacy 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 processor board for TDC3000 CE chassis,two independent control cores,improved redundant switch performance,proprietary backplane bus interface. Operating temperature range is 0°C to +60°C. It supports parity error,bus communication timeout,synchronization loss and watchdog fault diagnosis. The PCB is conformal coated for dust and moisture resistance. Front panel LED indicators display active/standby channel 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 upgrade and spare replacement projects. It cooperates with Honeywell NIM gateway,UCN communication cable and HM history module to build LCN+UCN distributed control architecture. As a core unit for CE dual node processor and redundant logic board,it is the upgraded computing core of TDC3000 Classic CE redundant control rack. Clearly defined edge connectors simplify rack installation,control scheme download test and regular redundant switchover performance verification work for control engineers.