Product Details：

Honeywell 51196714100 (51196714-100, HM History Module) is the core history memory and data recording board for Honeywell TDC3000 legacy DCS History Module rack,its main purpose is long-term storage of process historical data,alarm records,event sequence messages and system configuration tables for the whole LCN network. This board serves as the centralized data archive node of TDC3000 system. It continuously receives real-time sampling data uploaded from HPM controllers,operator stations and NIM gateway modules through the LCN bus,stores trend curves,parameter change records,interlock action events and operator operation logs in the on-board memory. It supports on-demand data retrieval,enabling operators to call historical trends and review alarm events on the universal station for process troubleshooting and production audit. It is equipped with built-in battery backup circuit to protect valid historical records and configuration data from being lost when the rack power supply is interrupted. It supports redundant HM deployment scheme. When the primary history board fails,the standby unit can continue recording data seamlessly to avoid missing critical production event records. It continuously monitors memory read-write state,LCN communication link and backup battery voltage,recording timestamped fault logs and uploading memory error or communication loss alarm information to LCN operator stations for maintenance engineers to judge and replace. It supports hot swap under lockout-tagout maintenance procedures to reduce data recording interruption risk for continuous production. It is a scarce original spare logic board for old TDC3000 projects,matched with LCN adapter board,clock source board and rack power supply module.

Key specifications：Rack plug-in HM history board for TDC3000 chassis,connects to LCN bus for centralized historical data archiving,battery-backed memory. Operating temperature range is 0°C to +60°C. It supports memory parity error,battery low voltage and LCN communication timeout fault diagnosis. The PCB is conformal coated for dust and moisture resistance. Front panel LED indicators display data recording status,active/standby mode and fault warning for quick on-site inspection.

This history module is widely deployed in petrochemical,chemical,power generation and water treatment plants for legacy TDC3000 DCS history rack maintenance and spare replacement projects. It cooperates with Honeywell NIM gateway board,HPM controller and operator station hardware to complete the whole process data monitoring and archiving architecture. As a core unit for HM history module and data logging board,it is the centralized historical data storage core of TDC3000 LCN network. Clearly defined edge connectors simplify rack installation,history data backup test and periodic backup battery voltage verification work for control engineers.