Honeywell TC800 Modules — TC809A1056

Technical Dossier

Product Details And Specifications

Honeywell TC800 Series: Comprehensive Module Range and Technical Overview

The Honeywell TC800 series is a core hardware platform within the TotalPlant Solution (TPS) and TotalPlant Alcont (TPA) Distributed Control System (DCS) architecture. Deployed extensively across global heavy industry — including petrochemical refineries, nuclear power facilities, offshore platforms, and continuous-process chemical plants — the TC800 hardware family represents one of the most widely installed DCS backplane ecosystems in operation today. Its modular architecture allows individual I/O, controller, communication, and power supply cards to be replaced independently, making it a preferred platform for long-cycle asset management programs where full system replacement is not operationally viable.

The Evolution of TC800 Architecture

The TC800 platform was introduced as part of Honeywell's TotalPlant Solution (TPS) DCS in the mid-1990s, succeeding the earlier TDC 3000 hardware generation. The architecture is built around a proprietary Local Control Network (LCN) and Universal Control Network (UCN), with the TC800 backplane serving as the physical integration point for all module types. Early revisions of the TC800 series used parallel bus communication between the motherboard and I/O modules; later revisions introduced enhanced diagnostics and improved EMI shielding to meet IEC 61000 industrial immunity standards.

The TC800 series is compatible with Honeywell's High-Performance Process Manager (HPPM) and Advanced Process Manager (APM) controller nodes. As the TPS platform has entered its extended lifecycle phase, Honeywell has transitioned primary development focus to the Experion PKS platform. However, the installed base of TC800 hardware remains substantial, and the demand for verified spare modules — particularly motherboards, I/O cards, and communication adapters — continues across maintenance, turnaround, and emergency replacement scenarios. Compatibility between TC800 hardware revisions requires careful attention to firmware version alignment and backplane slot addressing.

TC800 Full Catalog & Functionalities (SKU List)

The following SKUs represent verified components within the Honeywell TC800 / TPS DCS hardware ecosystem, organized by functional category:

Motherboards & Backplane Assemblies

• TC809A1056: TC800 series motherboard assembly; primary backplane interface for I/O and controller modules
• TC809A1024: TC800 motherboard variant; earlier revision with standard bus configuration
• TC809A1040: TC800 motherboard; mid-revision with enhanced slot diagnostics

Controller Modules (CPU / Process Manager)

• TC-CCR014: C300 Controller module; primary execution engine for Experion-compatible TC800 nodes
• TC-CCR013: C300 Controller; earlier firmware revision, compatible with legacy LCN configurations
• TC-FPCXX: Fail-safe Process Controller module; used in SIL-rated process segments
• 51304485-100: High-Performance Process Manager (HPPM) CPU card; direct TC800 backplane mount
• 51304485-150: HPPM CPU card, revision 150; enhanced memory and scan rate

Analog Input (AI) Modules

• TC-IAH161: 16-channel analog input module; 4–20 mA HART-enabled, 16-bit resolution
• TC-IAH081: 8-channel analog input; HART pass-through, isolated channel architecture
• 51309512-175: Analog input card; legacy TPS format, direct TC800 slot compatible

Digital Input (DI) / Digital Output (DO) Modules

• TC-IDG081: 8-channel digital input module; 24 VDC, optically isolated
• TC-ODG081: 8-channel digital output module; 24 VDC sourcing, short-circuit protected
• TC-OAH081: 8-channel analog output; 4–20 mA, HART-capable

Communication & Network Adapters

• TC-PCIC25: Process Control Interface Card; LCN/UCN bridge adapter for TC800 nodes
• TC-RPCXX: Redundancy module; enables 1:1 controller redundancy on TC800 backplane

Power Supply Modules

• TC-PRS021: TC800 power supply module; 24 VDC regulated output, DIN-rail compatible
• 51401469-100: Redundant power supply assembly; dual-feed input for critical process nodes

Sourcing Hard-to-Find & Obsolete TC800 Parts

Honeywell has formally designated portions of the TC800 / TPS hardware catalog as End-of-Life (EOL), with last-time-buy notifications issued for several module families. For facilities operating on extended maintenance contracts or deferring full DCS migration, sourcing verified surplus and refurbished TC800 modules is the primary strategy for sustaining system availability.

DriveKNMS maintains a dedicated inventory of TC800 series components, including hard-to-find motherboard assemblies such as the TC809A1056, legacy CPU cards, and I/O modules that are no longer available through Honeywell's standard distribution channels. All units are sourced from decommissioned systems, tested facilities, and authorized surplus channels. Each module is individually logged with its revision level and firmware version prior to dispatch.

For plant engineers managing multi-year turnaround cycles, DriveKNMS offers advance reservation of critical TC800 spares, ensuring module availability aligns with scheduled maintenance windows rather than emergency procurement timelines.

Quality Control for the TC800 Range

TC800 modules present specific testing challenges due to their proprietary backplane bus protocol and multi-layer PCB construction. DriveKNMS applies the following verification procedures to all TC800 inventory:

• Backplane Bus Continuity Test: Each motherboard assembly, including the TC809A1056, is tested for full pin continuity across all backplane connector positions using a dedicated TC800-compatible test fixture.
• Power Rail Verification: All power supply modules are load-tested at rated output current. Voltage ripple is measured against Honeywell's published tolerance specifications.
• I/O Channel Functional Test: Analog input and output modules are verified across the full 4–20 mA range. HART communication integrity is confirmed using a HART communicator device.
• Digital I/O Isolation Test: Optical isolation barriers on DI/DO modules are tested at 500 VDC to confirm channel-to-channel and channel-to-bus isolation integrity.
• Visual and Component Inspection: All boards undergo inspection for capacitor condition, solder joint integrity, corrosion, and physical damage prior to functional testing.
• Firmware Revision Logging: Controller and communication modules are powered and firmware versions are recorded to ensure compatibility documentation is provided with each shipment.