Honeywell 8C-TDOD61 / 51306973-175 – 8-Channel Digital Output Module | TotalPlant TPS / PlantScape DCS Platform
Engineering Background
The Honeywell 8C-TDOD61 (alternate part number 51306973-175) is an 8-channel transistor digital output (DO) module engineered for the Honeywell TotalPlant Solution (TPS) and PlantScape distributed control system platforms. Designed to interface directly with field actuators, solenoid valves, motor starters, and discrete control devices, this module delivers reliable, high-density digital output capability within the Honeywell C200/C300 and legacy TPS cabinet architectures.
Product Positioning
Targeted at process industries requiring deterministic discrete control — including refining, petrochemical, power generation, and pharmaceutical manufacturing — the 8C-TDOD61 is a proven field-replaceable unit (FRU) that maintains backward compatibility with existing TPS I/O bus infrastructure. Procurement engineers sourcing replacement or expansion modules will find this unit a direct drop-in for installed TPS systems without firmware or configuration changes.
Complete Technical Specifications
- Part Number: 8C-TDOD61
- Alternate / Catalog Number: 51306973-175
- Manufacturer: Honeywell Process Solutions
- Platform Compatibility: TotalPlant Solution (TPS), PlantScape, Experion PKS (legacy I/O)
- Module Type: Digital Output (DO) – Transistor Sourcing
- Channel Count: 8 channels
- Output Type: Solid-state transistor (NPN/sourcing)
- Output Voltage Range: 24 VDC nominal
- Output Current per Channel: Up to 0.5 A per channel
- Isolation: Optical isolation between field and system bus
- Backplane Interface: TPS I/O bus (proprietary Honeywell)
- Diagnostics: On-board LED status per channel; system-level fault reporting via DCS
- Operating Temperature: 0 °C to 60 °C (32 °F to 140 °F)
- Humidity: 5% to 95% RH, non-condensing
- Weight: Approx. 220 g
- Mounting: TPS I/O card cage / backplane slot
- Certifications: CE, UL (per Honeywell TPS system certification)
Proven Application Environments
- Oil & Gas refinery DCS control loops – solenoid valve and shutdown actuator control
- Petrochemical plant distributed I/O expansion for TPS cabinets
- Power generation facilities using legacy Honeywell TPS infrastructure
- Pharmaceutical batch processing with discrete device sequencing
- Pulp & paper mills requiring high-density DO in existing PlantScape systems
- Water treatment plants with motor starter and pump control via TPS
Engineering Advantages
- Direct Drop-In Replacement: 100% backward compatible with installed TPS I/O bus — no re-engineering required
- Optical Isolation: Protects DCS backplane from field-side transients and ground loops
- High Channel Density: 8 DO channels per slot maximizes cabinet I/O density
- On-Board Diagnostics: Per-channel LED indicators enable rapid field fault identification without test equipment
- Solid-State Output: No mechanical contacts — extended service life in high-cycle applications
- Proven Reliability: Deployed in safety-critical process environments globally for 20+ years
System Architecture & Signal Flow
The 8C-TDOD61 occupies a standard TPS I/O card cage slot and communicates with the Honeywell C200/C300 controller or legacy TPS Highway Interface Module (HIM) via the proprietary TPS I/O bus. Control commands from the DCS controller are decoded by the module’s onboard logic, which drives each of the 8 transistor output channels independently. Field wiring connects to the associated field termination assembly (FTA) via the backplane, maintaining full signal integrity and isolation. Fault status is reported back to the controller and surfaced in the Experion/TPS operator station HMI.
Sourcing & Quality Verification
- Condition: Genuine Honeywell surplus / refurbished — fully tested prior to shipment
- Inspection: Visual inspection, functional power-on test, and I/O channel verification performed
- Traceability: Original Honeywell part markings intact; no counterfeit risk
- Warranty: 90-day operational warranty from Konmask.com
- Packaging: Anti-static ESD bag + foam-lined carton for safe international transit
Procurement Process
- Confirm part number 8C-TDOD61 / 51306973-175 matches your installed TPS I/O bus revision
- Submit RFQ or place order directly via Konmask.com
- Receive proforma invoice with lead time confirmation (typically 1–3 business days for in-stock units)
- Payment via T/T bank transfer or approved credit terms
- Shipment via DHL / FedEx with full tracking; export documentation (commercial invoice, packing list, COO) included
- Post-delivery technical support available via email or WhatsApp
Technical FAQ
Q: Is the 8C-TDOD61 compatible with Experion PKS?
A: Yes, when used with legacy TPS I/O infrastructure connected to an Experion PKS system via the C200/C300 controller and appropriate I/O Link.
Q: What is the difference between 8C-TDOD61 and 51306973-175?
A: These are the same module — 8C-TDOD61 is the functional model number and 51306973-175 is the Honeywell catalog/order number. Both refer to the identical hardware.
Q: Can this module be hot-swapped?
A: Hot-swap capability depends on the TPS cabinet configuration and controller firmware version. Consult your Honeywell TPS system documentation or contact Konmask technical support before performing live replacement.
Q: Do you provide a Certificate of Conformance (CoC)?
A: Yes, a CoC is available upon request for all units shipped from Konmask.com.
Q: What FTA (Field Termination Assembly) is required?
A: The 8C-TDOD61 requires the corresponding Honeywell TPS digital output FTA for your cabinet type. Contact us with your cabinet model for a matched FTA recommendation.
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