Product Short Description
Product Name: NEC FC-9821KE Industrial CRT Operator Station
Product Overview: The NEC FC-9821KE is a dedicated CRT-based operator workstation for NEC’s EYIS (Engineering Yard Information System) and NDX distributed control systems. It served as the primary Human-Machine Interface (HMI) in legacy NEC control rooms, providing operators with real-time process visualization, alarm management, and system configuration capabilities. The product is now obsolete (End-of-Life).
Description
Technical Specifications:
- Manufacturer: NEC Corporation
- System Family: NEC EYIS and NDX Process Control Platforms
- Form Factor: Floor-standing or console-mounted industrial workstation with integrated 19″ monochrome CRT
- Processor: Intel i486 or early Pentium-class CPU (varies by revision)
- Operating System: Proprietary real-time OS or customized UNIX variant
- Display: Monochrome CRT, 1024 × 768 resolution, P39 phosphor
- Interfaces: RS-232/422 serial ports, proprietary NDX bus connection, PS/2 keyboard/mouse
- Power Supply: 100 – 240 V AC, internal linear or early switching PSU
- Cooling: Forced-air ventilation with replaceable filters
- Diagnostic Indicators: Power LED, HDD activity light, CRT degauss status
Functional Features: Runs the core HMI application for NEC EYIS/NDX systems, providing operators with real-time mimic diagrams, alarm lists, trend data, and manual override capabilities. Commonly deployed in Japanese and Asian power plants, steel mills, and municipal utilities from the 1980s through early 2000s.
Application Scenarios: Primary HMI in legacy NEC control rooms for process monitoring, alarm management, and system configuration in power plants, steel mills, and municipal utilities.
Structural & Material Characteristics: Industrial-grade floor-standing/console-mounted workstation with integrated CRT and forced-air cooling.
Installation Requirements: Install in a control room environment with adequate ventilation and stable 100–240 V AC power. Properly ground the unit to minimize electrical noise affecting the proprietary NDX communication card.
Usage Notes: Given 20+ years of potential continuous operation, common failure modes include CRT degradation (dimming, focus drift, tube failure), internal power supply capacitor aging causing random reboots, and mechanical wear on keyboard/trackball. Recommended maintenance: quarterly CRT brightness/geometry calibration; proactive power supply capacitor replacement; cleaning internal air filters during scheduled outages; maintaining at least one spare unit periodically powered to prevent “storage death.” No official manufacturer support, firmware updates, or genuine spare parts are available.
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