Emerson 406A124H01 WDPF Non‑Touch Desktop CRT Monitor Unit
Product Overview
Emerson 406A124H01 is a rugged, industrial‑grade non‑touch desktop CRT monitor unit, originally engineered by Westinghouse for the WDPF (Westinghouse Distributed Processing Family) DCS platform. Designed as a dedicated operator HMI (Human‑Machine Interface) for legacy WDPF control rooms, it provides stable video display and integrated keyboard/trackball interface support for WEStation and MMI workstations. Built to withstand harsh industrial environments with high EMI/RFI, vibration, and temperature fluctuations, this unit ensures long‑term reliability for mission‑critical process monitoring and control. Factory‑tested and certified by Emerson, it serves as a direct replacement for older WDPF CRT monitor assemblies, maintaining full backward compatibility with existing WDPF system infrastructure.
Basic Product Information
Part Number: 406A124H01
Manufacturer: Emerson Automation Solutions (formerly Westinghouse Process Control)
Product Type: WDPF Non‑Touch Desktop CRT Monitor Unit (Model E02038‑20E)
Compatible Systems: Westinghouse WDPF DCS, WEStation Operator Consoles, WDPF MMI Workstations
Form Factor: Desktop, freestanding, industrial CRT
Display Type: 14‑inch monochrome CRT, non‑touch
Interface Ports: Integrated WDPF keyboard port, DB25 serial, video input
Power Supply: 110 VAC, 50/60 Hz
Country of Origin: United States
Weight: Approximately 14.5 kilograms
Warranty: 12 months for new and factory‑tested refurbished units
Certifications: Emerson factory tested, EMC compliant, CE marked, UL recognized
Core Functions
The 406A124H01 functions as the primary visual display and input interface for WDPF DCS operator workstations. Its core role is to render real‑time process graphics, alarm screens, trend data, and system diagnostics from the WDPF controller, enabling operators to monitor and adjust industrial processes accurately. The integrated keyboard/trackball interface connects directly to WDPF MMI ports, supporting seamless data entry and cursor control without external adapters. The CRT display is optimized for industrial viewing conditions, offering high contrast and stable brightness to reduce eye fatigue during extended shifts. With built‑in surge protection and EMI shielding, it maintains consistent video quality in high‑interference environments, preventing signal distortion or data errors. The non‑touch design enhances durability in dusty or dirty control rooms, minimizing maintenance needs.
Technical Specifications
Electrical Specifications
Operating Voltage: 110 VAC ±10%, 50/60 Hz
Power Consumption: ≤85 watts
Video Signal: WDPF proprietary analog video, 640×480 resolution
Input Interfaces: WDPF keyboard port, DB25 RS‑232 serial, analog video in
Isolation Voltage: 1500 VAC between power and signal circuits
Surge Protection: IEC 61000‑4‑5 compliant
EMI/RFI Shielding: Full metal enclosure with conductive gaskets
Environmental Specifications
Operating Temperature Range: 0°C to +50°C
Storage Temperature Range: -20°C to +60°C
Relative Humidity: 10% to 90%, non‑condensing
Vibration Resistance: 0.2 g, 10–500 Hz
Shock Resistance: 20 g, 10 ms duration
Altitude: Up to 2000 meters
Enclosure Rating: NEMA 12 (dust and splash resistant)
Mechanical Specifications
Display Size: 14‑inch diagonal CRT
Resolution: 640×480 pixels, monochrome
Dimensions: 380 mm (W) × 420 mm (D) × 350 mm (H)
Housing Material: Heavy‑duty steel, corrosion‑resistant powder coating
Keyboard Interface: Integrated 84‑key WDPF keyboard port
Trackball Support: Compatible with WDPF serial trackball devices
Cooling: Passive convection, filtered ventilation slots
Compatibility
Emerson 406A124H01 is fully compatible with all Westinghouse WDPF DCS HMI components, including WEStation operator consoles, WDPF MMI workstations, and dedicated WDPF keyboard/trackball assemblies. It connects directly to WDPF controller video output ports and LocalBus‑powered MMI interfaces, eliminating the need for additional converters or adapters. The unit supports backward compatibility with legacy WDPF system revisions, replacing older CRT monitor models without hardware or software modifications. It also integrates seamlessly with WDPF alarm and event logging systems, ensuring consistent display of critical process data across the control room.
Industrial Applications
This CRT monitor unit is deployed exclusively in WDPF‑controlled industrial facilities where reliable, dedicated HMI display is critical:
Power Generation: Thermal power plants, combined‑cycle facilities, and nuclear power stations
Petrochemical Industry: Oil refineries, natural gas processing plants, and chemical manufacturing complexes
Heavy Manufacturing: Pulp and paper mills, mining operations, cement plants, and metallurgical facilities
Process Industries: Any WDPF‑based industrial plant requiring stable, long‑term operator workstation display
Installation Guidelines
Prior to installation, verify the unit’s compatibility with the WDPF system revision and workstation configuration. Place the monitor on a flat, stable surface in the control room, ensuring adequate ventilation around the enclosure to prevent overheating. Connect the WDPF video cable from the controller to the monitor’s video input port, ensuring a secure fit. Attach the WDPF keyboard/trackball assembly to the integrated port on the monitor’s rear panel. Connect the 110 VAC power cord to a grounded industrial outlet, avoiding shared circuits with high‑power equipment. Power on the unit and confirm the CRT illuminates with the WDPF system boot screen. Adjust brightness and contrast settings via the front‑panel controls for optimal viewing. Ensure all cables are routed away from high‑EMI sources such as motors or transformers to prevent video interference.
Maintenance and Troubleshooting
Perform monthly visual inspections to check for enclosure damage, loose cables, or abnormal CRT flickering. Clean the CRT screen and ventilation slots quarterly with a soft, dry cloth to remove dust buildup. Conduct annual electrical safety checks, verifying grounding integrity and insulation resistance. Common issues include no video display, which may result from a faulty power supply or loose video cable; check power connections and cable seating. Flickering or distorted video typically stems from EMI interference or a failing CRT; re‑route cables away from interference sources or replace the CRT. Unresponsive keyboard/trackball operation often relates to a loose interface connection; inspect and reseat the keyboard port cable. Replace the unit if irreparable CRT or power supply faults occur to maintain control room reliability.
Ordering Information
Part Number: 406A124H01
Product Category: DCS Spare Parts → WDPF System → HMI Monitors & Displays
Availability: New original and factory‑tested refurbished units (limited stock)
Standard Lead Time: 3–5 weeks; rush shipping available for urgent orders
Order Requirements: Specify WDPF system serial number and workstation model to confirm compatibility
Packaging: Heavy‑duty wooden crate with foam cushioning, ESD‑safe labeling, and factory test certificate
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