Honeywell DC-TDIL01 (51307780-176) – Digital Input Module | TDC 3000 DCS Platform
Engineering Background
The Honeywell TDC 3000 (Total Distributed Control) platform has been a cornerstone of process automation in refining, petrochemical, and power generation industries for decades. Its modular I/O architecture allows precise field signal acquisition with high reliability and deterministic scan performance.
Product Positioning
The DC-TDIL01 (P/N 51307780-176) is a dedicated Digital Input Module designed for the Honeywell TDC 3000 Local Control Network (LCN). It acquires discrete on/off field signals—such as valve position feedback, motor run status, and interlock states—and transmits them to the process controller with high-speed, noise-immune performance. This module is essential for any TDC 3000 system requiring reliable digital field signal integration.
Complete Technical Specifications
| Manufacturer | Honeywell Process Solutions |
| Part Number | DC-TDIL01 |
| Reference Number | 51307780-176 |
| Module Type | Digital Input Module (DI) |
| Platform / Series | TDC 3000 / Local Control Network (LCN) |
| Signal Type | Discrete Digital Input (dry contact / wet contact) |
| Communication Bus | TDC 3000 LCN Proprietary Backplane |
| Operating Temperature | 0°C to 60°C (32°F to 140°F) |
| Storage Temperature | -40°C to 85°C |
| Power Supply | Supplied via TDC 3000 backplane (no external PSU required) |
| Weight | 210 g |
| Form Factor | Single-slot plug-in card for TDC 3000 I/O chassis |
| Compliance | CE, UL listed (per Honeywell TDC 3000 system certification) |
| Country of Origin | USA |
Proven Application Environments
- Oil & Gas Refining – Valve position feedback, ESD interlock monitoring, pump run/stop status
- Petrochemical Plants – Reactor interlock chains, compressor status, safety shutdown systems
- Power Generation – Turbine protection logic, breaker status monitoring, generator interlock
- Pulp & Paper – Process interlock monitoring, conveyor status, motor control center feedback
- Pharmaceutical Manufacturing – Clean-room equipment status, batch process interlocks
- Water & Wastewater Treatment – Pump station monitoring, valve position feedback
Engineering Advantages
- Native TDC 3000 Compatibility – Plug-and-play replacement; no firmware reconfiguration required for standard LCN configurations
- High Noise Immunity – Optically isolated inputs protect controller logic from field-side transients and ground loops
- Deterministic Scan Performance – Consistent input scan cycle ensures reliable interlock and safety logic execution
- Hot-Swap Capable – Supports live replacement in redundant TDC 3000 configurations to minimize process downtime
- Compact Single-Slot Design – Maximizes I/O density within existing TDC 3000 chassis without expansion
- Long Field-Proven Service Life – Designed for continuous 24/7 operation in harsh industrial environments
System Architecture & Signal Flow
The DC-TDIL01 installs directly into the TDC 3000 I/O chassis backplane slot. Field wiring connects to the module’s terminal block via the standard TDC 3000 field termination assembly (FTA). Digital field signals (dry contact closures or voltage-level inputs) are optically isolated, debounced, and scanned by the module’s onboard logic. The digitized state data is then transmitted over the LCN backplane to the associated process controller (e.g., HPM or PM) for use in control strategies, alarm management, and historian logging.
Signal Flow: Field Device → FTA Terminal Block → DC-TDIL01 Optical Isolation → LCN Backplane → Process Controller → DCS Database / Historian
Sourcing & Quality Verification
All Honeywell modules supplied by Konmask.com undergo a structured incoming quality inspection process:
- Visual inspection for physical damage, corrosion, and component integrity
- Part number and revision label verification against Honeywell documentation
- Functional power-on test where applicable
- Anti-static packaging and climate-controlled storage prior to shipment
- Full traceability documentation available upon request
We source from decommissioned plant upgrades, certified surplus distributors, and authorized channel partners. Counterfeit-risk screening is applied to all high-demand Honeywell part numbers.
Procurement Process
- Confirm Part Number – Verify DC-TDIL01 / 51307780-176 matches your TDC 3000 system BOM or spare parts list
- Request a Quote – Contact us via email or phone with your required quantity and delivery timeline
- Review & Approve – We provide a formal quotation with lead time, warranty terms, and shipping options
- Place Order – Secure checkout via Konmask.com or purchase order (PO) accepted for qualified accounts
- Shipment & Documentation – Ships with packing list, inspection report, and optional certificate of conformance
Technical FAQ
Q: Is the DC-TDIL01 compatible with both HPM and PM process controllers?
A: Yes. The DC-TDIL01 is a standard LCN I/O module compatible with all TDC 3000 process controller types that use the standard LCN backplane architecture.
Q: Can this module be used as a direct replacement for a failed unit without reconfiguring the DCS database?
A: In most cases, yes. The module is a hardware replacement; the DCS configuration (point database, control strategies) resides in the controller, not the I/O module. Always verify with your DCS engineer before hot-swapping in a live process.
Q: What is the warranty on this module?
A: Konmask provides a 90-day functional warranty on all surplus/refurbished modules. Extended warranty options are available upon request.
Q: Do you provide a certificate of conformance or test report?
A: Yes. A certificate of conformance and incoming inspection report can be provided upon request at time of order.
Q: What is the lead time for DC-TDIL01?
A: In-stock units typically ship within 1–3 business days. Contact us to confirm current availability.
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