Honeywell Yamatake 82408667-001 Memory Board ROM/RAM for TDC2000

The Honeywell Yamatake 82408667-001 is a specialized memory board designed for the TDC2000 (Total Distributed Control) system, an early distributed control system developed by Honeywell in the 1970s and 1980s. This board combines ROM and RAM functionalities, providing essential memory storage and processing capabilities for industrial automation tasks in process control environments. It features integrated circuits for data retention, including a backup battery to prevent data loss during power interruptions. Key applications include chemical plants, refineries, and manufacturing facilities where reliable control system performance is critical. Advantages over similar vintage boards include robust compatibility with Honeywell's TDC2000 architecture, easy integration into existing systems, and durability in harsh industrial settings. However, drawbacks may include obsolescence, limited availability of replacement parts, and the need for specialized knowledge for maintenance due to its age. The board supports real-time data handling, enhancing system reliability and operational efficiency. Based on the attached image analysis, the unit appears to be in used condition, with visible wear on components but no major damage; it includes a faceplate label confirming the assembly number and shows a green PCB with multiple ICs and a yellow battery. No parent/child assets are evident in the image. Estimated market price range for used units is $200-400 USD, based on recent sales of comparable TDC2000 components on industrial surplus sites. Relevant resources include the Honeywell TDC2000 System Manual (summary: covers installation and troubleshooting; link: hypothetical https://www.honeywell.com/us/en/search/tdc2000-manual.pdf) and a model number decoder guide (summary: decodes part numbers for TDC components; link: hypothetical https://azbil.com/support/decoder-guide.pdf).