Description
The Honeywell 51402455-100 MP-DNCF02-201 is a Dual Node Card File assembly used in legacy Honeywell TDC 3000 and related process control architectures. It provides the mounting and electrical interface for multiple control cards, communication modules, and node-level hardware within the classic LCN-based system environment.
Key Functions:
- Dual node card file/backplane structure
- Provides module slot interconnection
- Supports Honeywell classic DCS node configurations
- Includes fan assembly for cabinet thermal management
- Used for long-life installed TDC 3000/TPS systems
Key Technical Specifications
| Parameter | Value |
|---|---|
| Product Model | MP-DNCF02-201 |
| Part Number | 51402455-100 |
| Manufacturer | Honeywell |
| Product Family | TDC 3000 / TPS Classic DCS |
| Product Type | Dual Node Card File Assembly |
| Function | Control node chassis and backplane |
| Architecture | Dual-node configuration |
| Backplane Type | Passive card file backplane |
| Supported Modules | Honeywell classic DCS node cards |
| Cooling | Integrated fan assembly |
| Mounting | Rack/cabinet installation |
| Power Distribution | Backplane power routing |
| System Network | Honeywell LCN environment |
| Typical Application | Process control cabinets |
| Operating Environment | Industrial control room/cabinet |
| Protection Level | Cabinet-mounted equipment |
| Replacement Consideration | Node configuration and card compatibility |
Product Introduction
Honeywell 51402455-100 MP-DNCF02-201 Product Introduction
Honeywell 51402455-100 MP-DNCF02-201 is a Dual Node Card File assembly designed for Honeywell TDC 3000 and TPS classic distributed control systems. Unlike processor or I/O modules, this unit serves as the mechanical and electrical foundation that houses node electronics and provides the internal bus connections required for system operation.
The Honeywell 51402455-100 MP-DNCF02-201 supports dual-node configurations where multiple control functions, communication interfaces, or application modules operate within the same cabinet assembly. The integrated fan assembly helps maintain acceptable operating temperatures for installed electronics during continuous plant operation.
The Honeywell 51402455-100 MP- remains relevant in plants that continue operating Honeywell legacy DCS platforms. Many process facilities maintain these systems because of validated control strategies, extensive field wiring, and the cost and risk associated with a complete control migration.
When replacing this assembly, engineers should not only match the part number. The installed card population, node addressing, power distribution, and LCN communication structure must also be verified.
51402455-100 MP-DNCF02-201
Application Scenarios & Field Pitfalls (The Engineer’s Perspective)
Engineering Pain Point
A legacy DCS cabinet experiences intermittent node communication failures or repeated module resets. Technicians replace individual cards, but faults continue because the actual problem originates from the card file assembly, backplane connection, or cooling system.
A chassis component can create system-wide symptoms. Poor slot connections, degraded backplane contacts, or insufficient airflow may appear as random controller or communication failures.
Typical Applications
Oil & Gas Processing
Used in:
- Refinery control systems
- Pipeline monitoring stations
- Compressor control applications
- Process unit automation
Chemical Plants
Applied for:
- Reactor control systems
- Batch process automation
- Distributed monitoring systems
Power Generation
Used in:
- Boiler control systems
- Auxiliary plant controls
- Balance-of-plant automation
Industrial Manufacturing
Applied for:
- Continuous production systems
- Long-life process control installations
- Legacy DCS cabinets
Technical Pitfalls to Avoid
1. Confirm Exact Card File Version
Honeywell produced multiple card file assemblies for different node configurations.
Verify:
- Node type
- Slot arrangement
- Installed boards
- Revision level
2. Inspect Backplane Connections
Before replacement, check:
- Oxidized contacts
- Loose card seating
- Connector wear
- Mechanical damage
A faulty connection can create intermittent faults that resemble failed modules.
3. Verify Cooling Performance
The integrated fan assembly is important for maintaining stable operation.
Check:
- Fan operation
- Airflow path
- Cabinet filters
- Ambient temperature
4. Preserve Node Configuration
Before removing the chassis:
- Record installed cards
- Document slot positions
- Save system configuration information
- Verify spare module compatibility
Related Products
- Honeywell 51401477-100
Single-node/alternate backplane assembly used in Honeywell classic DCS installations. It is not a direct replacement for dual-node configurations. - Honeywell TDC 3000 LCN Modules
Classic communication and controller modules installed within DNCF card file assemblies. - Honeywell 51305072-200 / 51305072-300
LCN interface-related card assemblies used with classic Honeywell node architectures. - Honeywell 51403519-160
Memory-related node component used in classic Honeywell system configurations. - Honeywell TDC 3000 Distributed Control System
Long-running process automation platform using LCN communication and modular node hardware. - Honeywell TPS (TotalPlant Solution)
Process control platform maintaining compatibility with many TDC 3000-era hardware assemblies.
