June 08, 2026

Emerson 406A066H01 WDPF Data Highway Communication Cable Product Description

Emerson 406A066H01 is a high‑reliability Data Highway (Westnet) communication cable engineered for the legacy Westinghouse WDPF Distributed Control System (DCS). Designed for interconnecting WDPF controllers, I/O modules, and operator workstations, it ensures robust, noise‑resistant data transmission across the WDPF network. This 30‑foot green Westnet cable supports high‑speed serial communication, maintaining signal integrity in electrically noisy industrial environments. It serves as a critical link for real‑time process data exchange, system diagnostics, and control commands in WDPF‑based plants.

Description

Emerson 406A066H01 WDPF Data Highway Communication Cable Product Description

1. Product Overview

2. Basic Product Information

Model Number: 406A066H01
Manufacturer: Emerson Automation Solutions (formerly Westinghouse Process Control)
Product Type: WDPF Westnet Data Highway Communication Cable
Cable Length: 30 feet (9.14 meters)
Cable Color: Green
Applicable Systems: Westinghouse WDPF DCS
Country of Origin: United States
Connector Type: WDPF‑compatible male/female connectors
Warranty: 12 months for new and factory‑tested units
Certifications: Emerson factory tested, EMC compliant, CE marked

3. Core Functions

The 406A066H01’s primary function is to establish a reliable serial communication link between WDPF system components via the Data Highway (Westnet) network. It transmits real‑time process data, control signals, and diagnostic information between controllers, I/O racks, and operator interfaces. The cable’s twisted‑pair, shielded design minimizes electromagnetic interference (EMI) and radio‑frequency interference (RFI), ensuring stable data transfer even in high‑noise industrial settings. It supports WDPF’s proprietary communication protocol, enabling seamless integration and data synchronization across the entire DCS. Additionally, it facilitates system‑wide diagnostics, allowing technicians to monitor network health and troubleshoot communication issues efficiently.

4. Technical Specifications

4.1 Electrical & Transmission

Cable Construction: Shielded twisted pair (STP)
Conductor Gauge: 22 AWG (standard for WDPF Westnet)
Characteristic Impedance: 120 Ω
Data Rate: Up to 19.2 kbps (WDPF Westnet protocol)
Maximum Distance: 30 feet (9.14 m, factory‑terminated)
Shielding: Foil + braided shield (100% coverage)
Voltage Rating: 300 VAC
Temperature Rating: -20 °C to +75 °C

4.2 Environmental

Operating Temperature: -20 °C to +75 °C
Storage Temperature: -30 °C to +80 °C
Relative Humidity: 5%–95% (non‑condensing)
Flexibility: Suitable for cable tray, conduit, and rack routing
Flame Retardancy: Compliant with UL 1061

4.3 Mechanical

Outer Jacket: PVC (green, abrasion‑resistant)
Connectors: Factory‑crimped, WDPF‑specific connectors
Weight: Approximately 2.0 kg (4.4 lbs)
Bend Radius: Minimum 8× cable diameter

5. Compatibility

The 406A066H01 is fully compatible with Westinghouse WDPF DCS and all Westnet‑enabled components, including WDPF controllers (e.g., 406A054H01 power supply‑integrated controllers), I/O modules (e.g., 406A036H01 RTD module), and operator workstations. It replaces older Westnet cable models, ensuring backward compatibility with existing WDPF installations. The factory‑terminated connectors eliminate wiring errors, enabling plug‑and‑play installation in WDPF racks and cabinets.

6. Industrial Applications

This cable is deployed in mission‑critical WDPF‑controlled industrial processes:

Power Generation: Thermal, combined‑cycle, and nuclear power plants
Petrochemical: Refineries, gas processing, and chemical manufacturing
Heavy Industry: Pulp & paper, mining, cement, and metallurgical facilities
Process Manufacturing: Any WDPF‑based plant requiring reliable inter‑module communication

7. Installation & Safety

Inspection: Check cable and connectors for damage before installation.
Routing: Avoid sharp bends and high‑EMI areas (e.g., motor drives, transformers).
Connection: Align connectors; push until fully seated; secure with locking clips.
Grounding: Connect cable shield to cabinet ground at both ends (<1 Ω resistance).
Testing: Verify communication status in WDPF diagnostic tools after installation.
Safety: Disconnect system power before connecting/disconnecting cables to avoid ESD damage.

8. Maintenance & Troubleshooting

Routine Checks: Quarterly inspection of connectors for wear/corrosion; annual cable continuity and shield integrity testing.
Common Issues:
- Communication Loss: Check connector seating, shield grounding, and cable for physical damage.
- Data Errors: Verify cable routing away from EMI sources; test for shield breaks.
- Intermittent Faults: Inspect connectors for loose pins or corrosion.

9. Ordering Information

Part Number: 406A066H01
Category: DCS Spare Parts → WDPF System → Communication Cables
Availability: New original and factory‑tested units (limited stock)
Lead Time: 2–4 weeks (standard); rush shipping available
Order Notes: Specify WDPF system serial number and required length (if custom) for compatibility.

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