YOKOGAWA NFCP502-W05 (STARDOM FCN-500 CPU Control Module) Detailed Explanation
I. Basic Product Positioning
Brand: Yokogawa (Japan)
Product Series: STARDOM FCN/FCJ Open Process Controller, compatible with CENTUM VP DCS system
Model: NFCP502-W05 is the main CPU processor card of the FCN-500 field control node
W05 represents a specific memory/firmware configuration version (large-capacity tag points, complex control operation configuration), the common hardware revision is S1
Function: Execute continuous control, sequential logic, data acquisition, external communication, can perform primary/backup redundant non-disruptive switching, widely used in chemical, thermal power, oil and gas, water treatment, refining projects
Core Hardware Configuration
1. Processor and Storage
CPU: Intel Atom E3815 1.46GHz industrial processor
Main memory: 256MB ECC error-correcting memory, reduces the probability of industrial control operation data errors
Static SRAM: 2MB (with ECC, lithium battery power loss saves critical parameters / variables)
Built-in Flash: 1GB flash memory, stores system firmware, user control programs
External Storage: SDHC slot (supports 4~32GB Class10 SD cards, used for program backup, event log storage)
Backup Battery: 1000mAh fluorine graphite lithium battery, saves SRAM data in case of power failure
2. Communication Interfaces
4 RJ45 Gigabit Ethernet ports (10/100/1000Mbps auto-sensing)
Can be respectively connected to Vnet/IP control network, upper-level monitoring, third-party Modbus TCP, OPC communication, remote maintenance
1 DB9 RS232-C serial port: local debugging, program download, fault diagnosis
SB duplex bus: extends local I/O modules (analog / digital card)
3. Power Supply Parameters
Module operating power supply: 5VDC ±5%, maximum current 1700mA, powered by the FCN rack backplane uniformly
Overall power consumption is approximately 8W
4. Environmental Parameters
Working temperature: 0℃ ~ +55℃ (standard control room environment); extended working conditions – 20℃~+70℃
Storage temperature: -40℃ ~ +85℃
Humidity: 5%~95% RH, no condensation
Protection grade: front panel IP20; supports long-term 7×24 uninterrupted operation of the cabinet
Key Control and Functional Features
Control Capability
Supports IEC61131-3 standard programming languages (FBD, LD, ST, SFC, etc.), can perform PID regulation, interlock logic, batch sequential control; can seamlessly connect to CENTUM VP DCS, used as a remote field control station FCS.
Redundant Architecture
Supports dual CPU redundant configuration, automatic non-disruptive switching (bumpless transfer) when the main CPU fails, the switching process does not interrupt control output, avoiding device interlock misoperation.
RAS Self-Diagnosis
Built-in complete hardware self-check: CPU, memory, network port, temperature, I/O bus faults are detected in real time, faults actively report alarms, facilitating operation and maintenance troubleshooting.
Multi-protocol Communication
Native support for Modbus TCP/RTU, Profinet, OPC UA/DA, Vnet/IP, can be connected to third-party instruments, inverters, SIS systems, plant-level MES.
Log and Event Recording It can store a large number of alarm, operation and fault events, facilitating post-fault traceability and analysis.
Model Disassembly
NFCP502: Standard CPU motherboard model of the FCN500 series
W05: Memory / Program Capacity Configuration Code, suitable for control projects with a large number of points and complex operations
S1: Hardware PCB Revision Version. When purchasing spare parts, the hardware version must be verified to avoid firmware incompatibility.
Typical Application Scenarios
Independent control station for chemical plant sections, connected to the CENTUM VP master DCS
Local control of auxiliary equipment in power plants, water treatment, and desalination water systems
Pipeline control systems for oil and gas long-distance transportation, booster stations
Local interlock and batch sequential control of refining and chemical plants
Technical renovation and expansion of old Yokogawa systems, replacing old FCN controllers
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