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Yokogawa NFCP501-W05 S2 STARDOM CPU Module

The Yokogawa NFCP501-W05 S2, also cataloged as the NFCP501-W05 CPU Module, operates as a dedicated hardware component for high-speed process control task execution within the STARDOM FCN-500 autonomous controller network.

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa NFCP501-W05 S2
Origin	Japan
Processor	Intel Atom E3815, 1.46 GHz
MainMemory	256 MB ECC
StaticRAM	2 MB ECC (Battery-backed, 700 KB retained data area)
SecondaryMemory	1 GB onboard Flash
ExternalMediaSlot	1 x SDHC Card Slot (4-32 GB, Class 10)
EthernetPorts	2 x RJ45, 10/100/1000 Mbps
SerialPort	1 x RS-232-C, 0.3-115.2 kbps, full/half duplex
InternalBus	SB Bus, duplex-compatible backplane
ExecutionSpeed	~10 μs per Kstep (Instruction List)
ControlApplicationCapacity	Max 3 MB (~400 Ksteps)
SequenceProgramCapacity	Up to 180 Ksteps Ladder Logic
MaxControlTasks	16 tasks
TaskExecutionCycle	5 ms increments
SupplyVoltage	5 VDC ±5%
CurrentConsumption	Max 1200 mA
BackupBattery	1000 mAh Graphite Fluoride Lithium
Dimensions	2.2 cm × 12.4 cm × 12.6 cm
Weight	0.3 kg
OperatingTemp	-20 degC to 70 degC
AmbientHumidity	5% to 95% RH, non-condensing
ProtectionClass	IP20

Process Control Connectivity

The CPU module implements channel-to-channel isolation to maintain signal integrity across multiple I/O loops. It supports standard industrial communication protocols including 4-20 mA HART loops and FOUNDATION Fieldbus/Profibus PA connectivity. Cold junction compensation (CJc) is integrated for temperature sensor signal stability under varying ambient conditions.

Frequently Asked Questions

Q: Does the NFCP501-W05 S2 support hot-swap CPU replacement?
A: Hot-swapping the CPU is only supported within a dual-redundant configuration with proper synchronization; single-unit replacement requires system shutdown.

Q: What is the maximum SD card capacity supported?
A: The module accepts SDHC cards from 4 GB up to 32 GB, Class 10, for extended storage.

Q: Are Ethernet ports electrically isolated?
A: Both RJ45 ports implement standard isolation to prevent backplane-induced interference while maintaining deterministic data throughput.

Field Installation Guidelines

1. Mount the module vertically on the designated STARDOM backplane, ensuring SB bus connectors are fully engaged.
2. Connect all external cabling through shielded industrial-grade Ethernet or serial cables; ground shields at one point only.
3. Maintain a minimum 20 mm spacing between adjacent modules for airflow and thermal dissipation.
4. Verify the supply voltage is stable at 5 VDC ±5% and avoid connecting during system power-up for initial installation.
5. Ensure environmental humidity remains below condensation level; install in enclosures rated IP20 or higher.

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