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Yokogawa NFCP502-W05 S1 CPU Module

Configured for control processor execution and Ethernet-based controller communication in the FCN control platform, the Yokogawa NFCP502-W05 (NFCP502 CPU Module) provides direct physical and data-processing execution. The module integrates an Intel Atom E3815 processor, ECC-protected memory resources, onboard flash storage, four Ethernet interfaces, and an SB bus interface for controller operation within FCN systems.

Suffix Breakdown & Model Matrix

Code	Description
NFCP502	CPU module for FCN with 4 Ethernet ports
W	With extended functions
0	Standard type
5	Basic type with no explosion protection

Hardware Specifications

Parameter	Specification
Model	NFCP502-W05 S1
Brand	Yokogawa
Origin	Not specified in supplied data
Product Type	CPU Module
Processor	Intel Atom E3815, 1.46 GHz
Main Memory	256 MB ECC
Static RAM	2 MB ECC, battery-backed
Secondary Memory	1 GB onboard flash memory
External Media	1 x SDHC slot, 4 GB to 32 GB, Class 10
Serial Port	1 x RS-232-C, D-sub 9-pin male
Serial Communication	Full duplex or half duplex, software selectable
Synchronization	Asynchronous
Supported Baud Rates	0.3, 1.2, 2.4, 4.8, 9.6, 14.4, 19.2, 28.8, 38.4, 57.6, 115.2 kbps
Network Interfaces	4 x Ethernet RJ45
Ethernet Speeds	1000BASE-T, 100BASE-TX, 10BASE-T
I/O Interface	SB bus (duplex)
RAS Functions	Watchdog timer, temperature monitoring
Battery	1000 mAh graphite fluoride lithium battery
Indicators	3 CPU LEDs, 2 Ethernet LEDs, 1 SD LED, 1 EXEC LED
Switches	RESET, SHUT DOWN, FUNC, EXEC
Protection	CPU cover with wire-lock hole
Supply Voltage	5 VDC +/- 5%
Current Consumption	1700 mA maximum

DCS Communication and Channel Isolation Considerations

As a Yokogawa FCN CPU platform component, the NFCP502-W05 performs controller processing and Ethernet communication functions through four independent RJ45 interfaces supporting 10 Mbps, 100 Mbps, and 1000 Mbps operation. The module exchanges process and control data through the duplex SB bus while maintaining ECC protection on both main memory and static RAM resources.

The integrated RS-232-C interface supports configurable full-duplex or half-duplex operation with baud rates up to 115.2 kbps, allowing connection to serial maintenance, configuration, or diagnostic devices where required by the control architecture.

Frequently Asked Questions

Q: Does the NFCP502-W05 support removable storage for maintenance activities?
A: Yes. The module includes one SDHC card slot supporting Class 10 SDHC cards from 4 GB to 32 GB for external storage functions.

Q: What Ethernet interfaces are available on the module?
A: The module provides four RJ45 Ethernet ports supporting 10BASE-T, 100BASE-TX, and 1000BASE-T communication speeds.

Q: Is memory protection implemented within the CPU module?
A: Yes. The main memory and static RAM both utilize ECC protection. The 2 MB static RAM is additionally backed up by an onboard lithium battery.

Field Installation Guidelines

• Verify that the controller node is de-energized or placed into the approved maintenance state before module installation or removal.
• Maintain proper grounding practices for controller cabinets and communication cable shields according to site electrical standards.
• Route Ethernet and serial communication cables separately from high-energy power conductors to reduce electromagnetic interference.
• Confirm SDHC media compatibility before insertion and avoid removing storage devices during active write operations.
• Inspect the battery condition during scheduled maintenance intervals if retained memory functions are required.
• Ensure unobstructed airflow around the controller assembly to support processor and internal component thermal management.
• After installation, verify CPU status LEDs, Ethernet link indicators, and EXEC status indications before returning the controller to service.

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