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FC9821X

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FC9821X
May 27, 2026

FC9821X

The FC9821X is a compact, rugged industrial factory computer (FA PC) from NEC’s FC-9821 series, designed for reliable operation in harsh factory and process automation environments. Built around an Intel 486 DX2 66 MHz CPU, it integrates onboard graphics, I/O ports, and expansion slots into a single unit, delivering stable performance for real-time control, data acquisition, and HMI tasks. With a durable chassis, extended temperature tolerance, and integrated watchdog functions, it ensures high availability for continuous industrial operation

Description

FC9821X

Product Introduction

The FC9821X is a compact, rugged industrial factory computer (FA PC) from NEC’s FC-9821 series, designed for reliable operation in harsh factory and process automation environments. Built around an Intel 486 DX2 66 MHz CPU, it integrates onboard graphics, I/O ports, and expansion slots into a single unit, delivering stable performance for real-time control, data acquisition, and HMI tasks. With a durable chassis, extended temperature tolerance, and integrated watchdog functions, it ensures high availability for continuous industrial operation.

Basic Information

  • Model: FC9821X (Model 1 / Model 2 variants)

  • Brand: NEC

  • Series: FC-9821X (Factory Automation Computer)

  • CPU: Intel 486 DX2 66 MHz (equivalent to 486 DX4 100 MHz with turbo)

  • Memory: Standard 2 MB (upgradable to 64 MB via expansion RAM boards)

  • Graphics: CIRRUS LOGIC GD5430, resolutions up to 1024×768 (256 colors)

  • Storage: Supports SCSI hard disk, floppy disk drive

  • Expansion: C-Bus slots for I/O and communication modules

  • Power Supply: AC 100/110 V, 50/60 Hz, 54 W typical

  • OS Compatibility: MS-DOS, Windows 95, Windows NT Embedded

  • Operating Temperature: 0 °C to 55 °C (Model 1); -20 °C to +70 °C (Model 2)

  • Mounting: Cabinet, panel, or DIN rail mount

Function and Positioning

The FC9821X serves as a cost-effective, high-reliability embedded controller for factory automation and process control systems. It executes real-time control logic, manages data acquisition from sensors and PLCs, and runs operator interface software. Positioned as a mid-range FA PC, it balances compact size, environmental ruggedness, and expandability, making it ideal for legacy system upgrades and new low-to-medium complexity automation projects. Its integrated graphics and I/O eliminate the need for external adapters, simplifying system integration.

Core Performance Parameters

  • CPU Performance: 66 MHz 486 DX2 for deterministic real-time computing

  • Memory Expandability: Max 64 MB RAM for data-intensive applications

  • Graphics Resolution: Up to 1024×768 (256 colors) for HMI visualization

  • I/O Capability: Onboard serial, parallel, and video ports for direct peripheral connection

  • System Reliability: Watchdog timer, ECC memory support, and surge protection

  • Environmental Resistance: Withstands vibration, dust, and extended temperature ranges

  • Power Stability: Tolerates ±10% voltage fluctuation and 30 ms power interruptions

  • Communication: Supports RS-232/485 and Ethernet via expansion cards

General Compatible Accessories

  • NEC FC-9821X expansion RAM boards (2 MB/4 MB/32 MB)

  • SCSI industrial hard disk drives and floppy disk drives

  • C-Bus I/O modules (digital/analog input/output, communication)

  • Industrial power supply units (AC 100/110 V compatible)

  • Shielded serial/parallel cables and video display cables

  • Industrial CRT/LCD monitors and touchscreen HMI units

  • DIN rail mounting brackets and industrial cabinet hardware

  • NEC system configuration and diagnostic software for FC-9821 series

Applicable Equipment Fields

  • Factory Automation: Assembly lines, packaging machinery, material handling systems

  • Process Control: Water treatment, chemical processing, food and beverage production

  • Industrial Machinery: Machine tools, textile machinery, printing equipment

  • Building Automation: HVAC systems, power monitoring, facility management

  • Semiconductor Manufacturing: Wafer handling, test equipment, cleanroom monitoring

  • Legacy System Upgrades: Replacement for older NEC FC-9800 series controllers


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