June 08, 2026

Emerson 406A066H02 WDPF Westnet Data Highway Communication Cable Product Description

Emerson 406A066H02 is a high‑performance, factory‑terminated Westnet Data Highway communication cable for the legacy Westinghouse WDPF Distributed Control System (DCS). As the yellow‑jacketed counterpart to the green 406A066H01, it provides robust, noise‑immune serial communication between WDPF controllers, I/O racks, operator workstations, and peripheral devices. Engineered for mission‑critical industrial environments, it ensures reliable real‑time data exchange, system diagnostics, and control command transmission across the WDPF network. The cable’s shielded twisted‑pair construction and industrial‑grade materials deliver exceptional signal integrity and long‑term durability in high‑EMI areas.

Description

Emerson 406A066H02 WDPF Westnet Data Highway Communication Cable Product Description

1. Product Overview

2. Basic Product Information

Model Number: 406A066H02
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: Yellow
Applicable Systems: Westinghouse WDPF DCS
Country of Origin: United States
Connector Type: WDPF‑compatible male/female, factory‑crimped
Warranty: 12 months for new and factory‑tested units
Certifications: Emerson factory tested, EMC compliant, CE marked, UL 1061 flame retardant

3. Core Functions

The 406A066H02 establishes a dedicated, high‑speed serial link for the WDPF Westnet network, enabling seamless communication between all system nodes. It transmits real‑time process variables, setpoints, alarm signals, and diagnostic data, supporting WDPF’s proprietary communication protocol for synchronized operation. The cable’s dual‑shielded design (foil + braid) minimizes EMI/RFI interference and ground‑loop issues, critical for maintaining data accuracy in electrically noisy environments like power plants and refineries. It also facilitates system‑wide diagnostics, allowing technicians to monitor network health and troubleshoot communication faults quickly. The yellow jacket provides clear visual differentiation from green Westnet cables for simplified cable management in dense cabinets.

4. Technical Specifications

4.1 Electrical & Transmission

Cable Construction: Shielded twisted pair (STP), 22 AWG
Characteristic Impedance: 120 Ω
Data Rate: Up to 19.2 kbps (WDPF Westnet protocol)
Maximum Length: 30 feet (9.14 m, fixed factory length)
Shielding: 100% foil coverage + braided copper shield
Voltage Rating: 300 VAC
Insulation Resistance: ≥100 MΩ at 25 °C

4.2 Environmental

Operating Temperature: -20 °C to +75 °C
Storage Temperature: -30 °C to +80 °C
Relative Humidity: 5%–95% (non‑condensing)
Flame Retardancy: UL 1061 compliant
EMI/RFI Protection: EMC compliant for industrial environments

4.3 Mechanical

Outer Jacket: PVC (yellow, abrasion and oil resistant)
Connectors: Factory‑crimped, WDPF‑specific locking connectors
Weight: Approximately 2.0 kg (4.4 lbs)
Minimum Bend Radius: 8× cable diameter
Pull Tension: ≤50 lbs during installation

5. Compatibility

The 406A066H02 is fully compatible with all Westinghouse WDPF DCS components, including WDPF controllers, I/O modules, power supplies (e.g., 406A054H01), and operator interfaces. It is a direct replacement for older yellow Westnet cable models and works alongside green 406A066H01 cables in mixed installations. The factory‑terminated connectors ensure plug‑and‑play compatibility with WDPF backplanes and ports, eliminating field wiring errors and reducing installation time.

6. Industrial Applications

This cable is deployed in critical process industries relying on WDPF DCS:

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
Water Treatment: Large municipal and industrial water/wastewater plants

7. Installation & Safety

Pre‑Installation Inspection: Check cable, connectors, and jacket for damage before installation.
Routing: Avoid sharp bends, high‑EMI sources (motors, transformers), and direct sunlight.
Connection: Align connector pins, insert fully, and secure with locking clips.
Grounding: Connect shield to cabinet ground at both ends (resistance <1 Ω).
ESD Protection: Use anti‑static wristband when handling connectors to prevent static damage.
Power‑Off Requirement: Disconnect system power before connecting/disconnecting cables.

8. Maintenance & Troubleshooting

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

9. Ordering Information

Part Number: 406A066H02
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 cable color requirement for compatibility.

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