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The NFCP502-W05 is a high-performance central processing unit for the Yokogawa Electric Corporation STARDOM FCN-500 autonomous controller series. Designed to combine PLC flexibility with DCS-level reliability, this CPU utilizes an Intel Atom E3815...
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The NFCP502-W05 is a high-performance central processing unit for the Yokogawa Electric Corporation STARDOM FCN-500 autonomous controller series. Designed to combine PLC flexibility with DCS-level reliability, this CPU utilizes an Intel Atom E3815 (1.46 GHz) processor to execute complex regulatory control, sequencing logic, and data handling simultaneously.
A key differentiator is its quad Gigabit Ethernet architecture, enabling advanced network segmentation, redundant communication paths, and secure system zoning for critical infrastructure applications.
The module integrates ECC (Error Correcting Code) memory and battery-backed SRAM to maintain data integrity during power disturbances. A rugged, wire-lockable protective cover secures the RESET and SHUT DOWN switches, aligning with industrial cybersecurity and physical protection standards.
Engineered for high-availability deployments, the NFCP502-W05 supports duplex SB-bus interfaces for synchronized I/O redundancy.
| Parameter | Specification |
|---|---|
| Processor | Intel Atom E3815 (1.46 GHz) |
| System Memory | 256 MB ECC-RAM |
| Non-Volatile Storage | 1 GB On-board Flash + 2 MB Battery-backed SRAM |
| Expandable Storage | SDHC Slot (4–32 GB, Class 10) |
| Ethernet Ports | 4 × 10/100/1000 Mbps RJ45 |
| Serial Interface | 1 × RS-232-C (D-sub 9-pin, up to 115.2 kbps) |
| Backplane Interface | Duplex SB-bus compatible |
| Diagnostic Indicators | 7 Status LEDs (CPU, Ethernet, SD, EXEC) |
| On-board Controls | RESET, SHUT DOWN, FUNC, EXEC tactile switches |
| Reliability Features | Watchdog timer + Internal temperature monitoring |
| Battery Type | 1000 mAh Graphite Fluoride Lithium |
| Input Voltage | 5 VDC (±5%) |
| Maximum Current Consumption | 1700 mA |
The NFCP502-W05 incorporates hardware-level RAS functions to maximize plant uptime:
Watchdog Timer: Detects software lockups and initiates safe recovery.
Thermal Monitoring: Internal temperature sensor provides early detection of cabinet cooling failures.
Controlled Shutdown Sequence: Ensures data logs and process variables are written to flash memory before power-down, preventing file system corruption.
Physical Security: Wire-lockable protective cover prevents unauthorized manual reset or shutdown.
Does the NFCP502-W05 support redundant CPU configurations?
Yes. The NFCP502-W05 can operate in a dual-redundant configuration on an FCN-500 backplane. If the primary CPU fails, the standby unit assumes control within milliseconds without disturbing process outputs.
What type of SD card is recommended?
Although standard SDHC cards (4–32 GB) are supported, industrial-grade SLC (Single Level Cell) SD cards are strongly recommended for high-write logging applications to ensure long service life and data reliability.
