Product Short Description
Product Name: NEC FC-9821X MODEL2 Industrial Automation Computer (Factory Computer)
Product Overview: The NEC FC-9821X MODEL2 is a high-performance industrial automation computer from the PC-9821 series, powered by an Intel i486 DX2 66 MHz processor. It was the mainstream choice for mid-to-high-end industrial control and data acquisition systems in the 1990s and is now primarily maintained via existing inventory and spare parts.
Description
Technical Specifications:
- CPU: Intel i486 DX2 @ 66 MHz (fixed)
- Standard Memory: 4 MB (upgradable to max 956 MB from September 1999 onward)
- Graphics: Cirrus Logic GD5430 with 1.6 MB VRAM
- Display Output: RGB, 640 × 400/480 (256 colors), 1024 × 768 (256 colors)
- Storage: Front-accessible removable bay (supports 80 MB MO / 120 MB SCSI HDD); optional front MO/hard disk + internal SCSI HDD
- RAM Disk: Supports FC-9801F-RF1/RF2 (1 MB equivalent), 1–2 modules
- Expansion Slots: 6 standard (including 2 RAS function slots), expandable to 13 with FC-9812U
- Communication: RS-232C × 1 (D-sub 25, max 19.2 kbps); supports C&C-NET remote I/O
- Storage Interface: Front storage bay; internal SCSI (requires adapter card); external SCSI
- Other Interfaces: Printer port (D-sub 14, requires PC-9821-K02 to Centronics adapter)
- Power Supply: AC 85 – 121 V (100/110 V ±10%/-15%), 50/60 Hz ±1 Hz
- Max Power Consumption: 123 W
- Operating Temperature: 0 – 40 °C
- Storage Temperature: -20 – 60 °C
- Relative Humidity: 20 – 90 % (non-condensing)
- Vibration Resistance: 10 G (without internal HD)
- Form Factor: 19-inch rack-mount capable
- Operating Systems: Windows 3.1 / NT 3.51 / MS-DOS, fully compatible with PC-9800 software ecosystem
Functional Features: High processing speed for computationally intensive field systems; advanced storage capability with large-capacity SCSI disk for massive real-time data and complex database operations; extremely high reliability with RAS (Reliability, Availability, Serviceability) functions; rich I/O expandability for connecting field sensors, actuators, and PLC systems.
Application Scenarios: Real-time monitoring and control in semiconductor, electronics manufacturing, and large assembly lines; Manufacturing Execution Systems (MES) for machine status monitoring, massive data collection, and complex field control commands; large-scale data backup systems and database servers.
Structural & Material Characteristics: 19-inch rack-mount industrial chassis with anti-voltage-fluctuation power supply design.
Installation Requirements: Mount in 19-inch rack or place in industrial environment with stable AC 85–121 V power. Ensure operating temperature stays within 0–40 °C.
Usage Notes: As an obsolete platform, maintain spare units for critical deployments. Pay attention to aging electrolytic capacitors in the power supply. The PC-9800 software ecosystem compatibility is essential — do not attempt to run modern operating systems natively.
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