NEC FC-9821X MODEL2 Factory Computer

The NEC FC-9821X MODEL2 is a high-performance factory computer from the PC-9821 series, designed for demanding industrial automation applications. It is optimized for use in semiconductor manufacturing, electronics assembly, and large-scale production lines where real-time data processing and control are critical. The system is based on a 32-bit CPU (i486-compatible) and is equipped with a large-capacity SCSI disk (typically 1.6 GB) for handling substantial amounts of real-time data.

Factory-Optimized Design

The FC-9821X MODEL2 is built for factory-floor reliability, featuring a robust chassis designed for 19-inch rack mounting. The system incorporates advanced RAS (Reliability, Availability, Serviceability) features, including self-diagnostics and monitoring of temperature and fan status. With an IP40 rating (or IP55 with an optional dust filter), the computer is protected against dust ingress, making it suitable for industrial environments with airborne particles. It operates reliably in temperatures ranging from -10°C to +55°C.

High-Speed I/O and Expansion

The computer is equipped with PIO and MAP expansion buses, which are specialized industrial interfaces designed for high-speed data exchange with sensors, actuators, and PLCs. These buses enable the system to connect to a wide range of field devices, making it suitable for real-time monitoring and control applications. The large SCSI disk capacity (1.6 GB) provides ample storage for process data, production logs, and system software. Additional interfaces include RS-232 serial ports and a parallel port for connectivity to legacy peripherals.

Application Domains

The NEC FC-9821X MODEL2 is used in semiconductor manufacturing for real-time process control, electronics assembly lines for monitoring and quality assurance, large-scale production systems (MES), real-time data backup and database servers, and factory automation systems requiring high-speed I/O. It is primarily used in legacy industrial installations where the PC-9821 architecture is still supported.