Honeywell 82408667-004 Memory Module

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• • • • • • • • • • • • • • • • • • • • • Honeywell 82408667-004 — TDC 2000 / CB535 Series Memory Module

                                          A plug-in memory module for Honeywell's legacy TDC 2000 distributed control system (and CB535-based controllers), used to store the controller's application program, configuration and runtime data. It is part of the 82408667-xxx family of ROM/RAM and RAM MOS memory cards and is supplied as an obsolete / long-lead spare for installed TDC 2000 plants.

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                                          Key Technical Specifications

                                          表格

                                          Item	Specification
                                          Manufacturer	Honeywell Process Solutions
                                          Catalog number	82408667-004
                                          Product type	Controller memory module (ROM/RAM / RAM MOS card)
                                          System compatibility	Honeywell TDC 2000 / CB535 series controllers
                                          Family	82408667-xxx (sibling variants: -001 ROM/RAM CB535, -005 RAM MOS)
                                          Memory technology	MOS semiconductor memory (ROM/RAM mix per card variant)
                                          Form factor	Honeywell plug-in card, inserts into the controller's memory-card slot
                                          Function	Stores control logic, database, configuration and runtime data for the CB535/TDC 2000 controller
                                          Origin	USA
                                          Product status	Obsolete / legacy spare — no longer in active production; supplied through authorized MRO and surplus channels

                                          Note: Honeywell does not publish a modern public datasheet for this specific suffix. Exact capacity, access time and power-supply values are controller-specific and should be confirmed against the original TDC 2000/CB535 installation drawing and the card's nameplate.

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                                          Advantages & Features

                                          • Genuine OEM spare — direct replacement for the original 82408667-series card, preserving the TDC 2000 controller's memory compatibility and program integrity.
                                          • Plug-in form factor — field-swappable in the controller's memory slot; no soldering or board-level repair needed.
                                          • Family-matched variants — the 82408667-xxx line covers ROM/RAM and RAM MOS configurations, so the correct suffix must match the controller's revision and memory map.
                                          • Supports long-life legacy plants — TDC 2000 systems remain in service in many refineries, chemical and power plants; this card keeps those controllers running without a full DCS migration.
                                          • No battery-backed RTC dependency for program storage — program/configuration resides on the card; RAM contents are preserved per the controller's own backup scheme.
                                          • Worldwide MRO availability — stocked by Honeywell-authorized and independent DCS spare-parts distributors.

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                                          Typical Applications

                                           

                                          • Replacement memory card for Honeywell TDC 2000 basic controllers / CB535 processors
                                          • Refinery, petrochemical, chemical, power and pulp & paper plants still running legacy TDC 2000
                                          • Spare-parts inventory for plants under long-term service contracts
                                          • Controller repair, board swap and preventive-maintenance programs
                                          • Retrofit / life-extension projects that keep TDC 2000 operational until a scheduled migration to Experion / ControlEdge
                                          • Training and spare cards for OEM and system integrator service depots

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