YOKOGAWA NFCP502‑W05 CPU Module
Product Introduction
The YOKOGAWA NFCP502‑W05 CPU module is a high‑spec core processing unit within the STARDOM FCN‑500 autonomous controller series. Pre‑loaded with extended function software packages, it is equipped with four Gigabit Ethernet ports. Powered by the Atom E3815 processor, it delivers high‑speed process computation and serves as the core computing component for long‑distance oil & gas pipelines, distributed water treatment plants, and plant‑wide SCADA systems.
The NFCP502‑W05 CPU module offers full compatibility with redundant architectures. It features ECC error‑correcting memory and a power‑fail protected file system, and supports offline maintenance via SD card. Natively integrated protocol libraries include flow calculation functions and the complete suite of DNP3 and Modbus industrial protocols. Compared with the dual‑port NFCP501 series, it provides greater flexibility for network segmentation. It enables isolation of the control network, maintenance network, and third‑party device communication network simultaneously, making it suitable for large‑scale distributed automation projects with multi‑system integration. A single NFCP502‑W05 module in a complete FCN‑500 cabinet can handle full‑domain I/O scheduling and cross‑platform data interaction.
Technical Specifications
Core Hardware Specifications
| Processor | Intel Atom E3815, 1.46 GHz |
| Memory & Storage | 256 MB ECC main memory; 2 MB ECC battery‑backed static RAM; 1 GB on‑board flash memory; external SDHC card slot supporting 4‑32 GB Class10 cards |
| Network Interfaces | 4‑channel RJ45 Gigabit Ethernet (10/100/1000 Mbps auto‑negotiation); 1‑channel RS232‑DSUB9 serial port (serial port disabled under redundant mode) |
| Backplane Bus | Dual‑redundant high‑speed SB backplane bus; supports connection to N2EB E2 remote expansion bus |
| Power Supply | 5 VDC ±5%, maximum power consumption 1700 mA |
| Mechanical Dimensions | 65.8 mm (W) × 130 mm (H) × 149.3 mm (D); occupies 2 rack slots; net weight 0.9 kg |
| Backup Battery | 1000 mAh lithium‑fluoride battery; supports online hot‑swap; built‑in low‑battery self‑diagnostic alarm |
| Status Indicators | HRDY/RDY/CTRL system operation LEDs; LINK/ACT transmit‑receive LEDs for Ethernet ports; SD card read‑write LED; EXEC maintenance‑operation LED |
| Operation Keys | RESET, SHUTDOWN, FUNC function‑select, EXEC execute; lock‑protected cover to prevent unintended operation |
Software & Operating Specifications
| Program Performance | Minimum task cycle 5 ms; approx. 10 μs scan time per 1K‑step IL program; maximum control program capacity 3 MB (approx. 400 K steps) |
| Programming Languages | Full support for five IEC 61131‑3 standard languages (LD / FBD / ST / SFC / IL). |
| Embedded Software Packages | W‑suffix extended functions, integrating AGA gas metering, API liquid‑product flow calculation, Modbus master/slave, DNP3 server, multi‑brand PLC interconnection, SNTP time‑synchronization and complete process libraries |
| Environmental Specifications (Wide‑temperature variant NFCP502‑W05‑S1) | Operating: −20 ℃ ~ 70 ℃; storage: −40 ℃ ~ 85 ℃; humidity 5%‑95% non‑condensing; IP20 ingress rating; fan‑less natural cooling. |
| Compliance Standards | CE, CSA, ATEX Type‑n, IECEx, RoHS; ISA‑G3 anti‑corrosive coating available as option |
Core Functional Advantages
1. Multi‑Segment Network Isolation & Redundant Communication
Equipped with four independent Gigabit Ethernet ports, the NFCP502‑W05 enables flexible partitioning for redundant control network, dedicated third‑party device network and maintenance‑debug network. Upon primary‑CPU failure, IP address fails‑over automatically to the standby NFCP502‑W05 with zero communication interruption. It supports dual‑link OPC connection to host‑level SCADA systems, and accommodates low‑bandwidth remote transmission over GPRS or satellite links; only change‑of‑state data is transmitted to reduce data‑traffic costs.
2. Full‑Link High‑Availability Redundant Architecture
Dual‑redundant deployment is available for CPU, power supply, SB backplane bus and E2 remote expansion bus. Two identical NFCP502‑W05 modules synchronize programs and process parameters automatically with no extra programming required. All compatible I/O modules, power supplies and backplanes support hot‑swap; module replacement can be performed without system shutdown. Predefined safe output values are enforced upon faults to prevent process runaway.
3. ECC Hardware‑based Data Protection
All memory is equipped with error‑correction‑code hardware to auto‑correct single‑bit RAM faults. Combined with power‑fail‑safe file system, sudden power loss will not result in loss of user programs, PID tuning parameters or historical event logs. Battery‑backed RAM preserves critical process setpoints long‑term, reducing frequent project‑file backup operations.
4. PC‑Free Off‑line Maintenance Framework
Local backup / restore via SD‑card is native to NFCP502‑W05. Project import‑export can be completed via front‑panel FUNC and EXEC keys; password‑based SD‑card encryption is supported. System logs, I/O diagnostics and CPU‑load status can be remotely viewed via web interface; basic troubleshooting is achievable without dedicated host‑software.
5. Standardized Process Libraries to Lower Engineering Costs
W‑suffix extended firmware contains industry‑specific POU function blocks for oil‑gas, water‑treatment and power sectors. Modular encapsulated routines cover PID control, lag compensation, square‑root computation, HART / FF fieldbus acquisition. Custom libraries can be encrypted for reuse. Off‑line hardware‑free simulation is supported: full‑logic debugging can be completed on PC before downloading to NFCP502‑W05, greatly shortening site commissioning cycles.
6. Industrial Compatibility for Wide‑temperature & Corrosive Environments
Optional wide‑temperature operating range from −20 ℃ to 70 ℃ with ISA‑G3 anti‑corrosive coating. Fan‑less mechanical design mitigates dust‑induced failures. Well‑suited for harsh field conditions including desert oil‑gas wellheads, cold‑climate long‑distance pipelines and humid water‑treatment workshops.
Key Features
Unified Modular Spare‑parts: The NFCP502‑W05 shares power supplies, backplanes and I/O modules with NFCP501 as well as simplex/redundant cabinets, reducing on‑site spare‑part SKUs and capital occupation.
Multi‑protocol‑Compatible Buses: Natively supports FF fieldbus, HART, PROFIBUS‑DP and CANopen. It also enables cross‑device communication with Mitsubishi, Yokogawa FA‑M3 and Omron PLCs.
Remote Distributed Expansion: When paired with N2EB E2 bus modules, one NFCP502‑W05 can connect up to 8 remote expansion units. The maximum distance for a single bus segment reaches 800 m, and extends to 5 km with fibre‑optic conversion, ideal for distributed measuring points along long‑distance pipelines.
Unified Security Policy: Adopts the same IT‑security configuration specifications as Yokogawa CENTUM VP DCS. Firewall segmentation manages service networks and control networks to block unauthorised cross‑network access.
Full‑scope Self‑diagnostics: Covers CPU temperature monitoring, I/O channel wire‑break detection, battery level pre‑alarm and bus fault localisation. Fault messages are synchronously uploaded to SCADA for pop‑up alerts.
Lightweight Web‑based Monitoring: No client software installation required. Access NFCP502‑W05 directly via browsers on PCs or mobile phones to view live measuring points, fault logs and program versions.
Application Fields
Oil & Gas Industry: Gas transmission pipeline distribution stations, oil‑field wellhead RTUs, LNG tank metering, and flow control for oil‑gas gathering‑transmission pump stations. Leverage multi‑port network isolation of NFCP502‑W05 for metering systems and dispatch SCADA.
Water Treatment Industry: Urban‑rural water supply network monitoring, aeration and sedimentation process control in wastewater plants, and remote cluster dispatching of pump stations. The E2 bus performs long‑distance distributed acquisition of water‑network liquid‑level and pressure measuring points.
Power & Energy: Wind‑power box‑transformer monitoring, PV combiner cabinets, and logic control of auxiliary pumps and fans in thermal power plants. Redundant CPUs guarantee uninterrupted power‑system monitoring.
Chemical & Petrochemical: Medium‑and‑small‑scale rectification units, tank‑farm monitoring, and temperature‑pressure regulation for heat‑exchange stations. HART bus connects smart valves and analysers.
Municipal Utilities: Urban heating pipelines, gas pressure‑regulating stations, and unattended remote wastewater‑treatment stations, supporting wireless remote data upload over low‑bandwidth links.
Manufacturing Complete Sets of Equipment: Air compressors, refrigeration units and auxiliary production‑line control units; interfaces with upper‑level MES and third‑party PLC systems.
Product Comparison (NFCP502‑W05 vs NFCP501‑S05)
Ethernet Port Configuration: The NFCP502‑W05 comes with four Gigabit Ethernet ports and supports three‑network segmentation. The NFCP501‑S05 only has two Ethernet ports and can build one set of redundant network.
Software Functions: The NFCP502‑W05 is the W‑suffix extended version, fully equipped with complete process libraries for oil‑gas flow metering and multi‑PLC communication. The NFCP501‑S05 is the S‑suffix standard version without advanced metering and third‑party device interconnection libraries.
Power Consumption: Maximum current of NFCP502‑W05 is 1700 mA; the standard NFCP501 reaches maximum 1200 mA.
Application Scenarios: NFCP502‑W05 is suitable for large‑scale multi‑system integration projects, long‑distance transmission pipelines and scenarios with massive third‑party device connections. NFCP501‑S05 applies to small standalone units and local control of single‑process loops.
Remote Expansion Limit: Both support up to 8 units of E2 expansion units with identical I/O load capacity.
Redundancy Compatibility: The two CPUs can serve as mutual backups. Nevertheless, redundant pairing requires exactly identical model suffixes. Hot‑standby dual‑modular redundancy between NFCP502‑W05 and NFCP501 series is not allowed.
Compatible Products
1. Rack Backplanes
NFBU200 (Long rack, 19‑inch rack‑mount / DIN‑rail mounting), NFBU050 (Short DIN‑rail rack), N2BU030 (Compact rack)
2. Power Supply Modules
NFPW441 (100‑120 VAC input), NFPW442 (220‑240 VAC input), NFPW444 (24 VDC wide‑temperature DC power supply)
3. Remote Expansion Bus Modules
N2EB100 E2 Bus Interface Module, NFSB100 SB Backplane Repeater Module
4. Analog I/O Modules
NFAI135 (8‑channel isolated 4‑20 mA HART input), NFAI143 (16‑channel isolated analog input), NFAR181 (RTD platinum resistance input), NFAI543 (16‑channel isolated analog output)
5. Digital I/O Modules
NFDV151 (32‑channel 24 VDC isolated DI), NFDV551 (32‑channel 24 VDC isolated DO), NFDR541 (16‑channel relay output)
6. Fieldbus Communication Modules
NFLF111 FF Fieldbus Module, NFLP121 PROFIBUS‑DP Module, NFLC121 CANopen Module, NFLR121 RS485 Modbus Module
7. Matching Cables and Terminals
NFCB301 Special‑purpose SB bus cable, KMS40/KMS50 MIL signal cables, NFT series crimp terminals, NFDCV01 slot dust‑proof cover
FAQ
Q1: What do suffix‑W and suffix‑S stand for on NFCP502‑W05, and can they be mixed?
A1: W stands for Extended function package with embedded oil‑gas metering and multi‑brand PLC communication libraries. S stands for Standard function with basic control logic only. Redundant dual‑CPU pairing requires identical suffixes. Synchronization between NFCP502‑W05 and S‑suffix CPUs is not permitted.
Q2: What is the maximum remote I/O expansion distance for NFCP502‑W05?
A2: When used with N2EB100 E2 module, the maximum distance between expansion units is 100 m, and total length per bus is 800 m. With fibre‑optic media converters installed, the maximum bus length extends to 5 km. One NFCP502‑W05 can connect up to 8 cascaded expansion units.
Q3: Is the RS232 serial port of NFCP502‑W05 available under redundant mode?
A3: The hardware serial port is automatically disabled when two NFCP502‑W05 modules run in hot‑standby redundancy. For Modbus RTU serial communication, install the additional NFLR121 communication module.
Q4: Can NFCP502‑W05 be used in outdoor cabinets at ‑20 ℃ low‑temperature conditions?
A4: Complete part numbers NFCP502‑W15/W16 with S1 wide‑temperature suffix operate from ‑20 ℃ to 70 ℃. Standard W05/W06 versions support 0‑55 ℃ only. The ‑1‑suffix wide‑temperature variant must be selected for low‑temperature applications.
Q5: Is separate programming software required when purchasing NFCP502‑W05?
A5: The basic Logic Designer tool NT203AJ is supplied together with the unit. Flow‑calculation and DNP3 extended libraries NT205AJ are pre‑embedded in W‑suffix NFCP502‑W05; no extra license purchase is needed.
Q6: Is program re‑download required after replacing NFCP502‑W05?
A6: After hot‑swap replacement with an identical NFCP502‑W05, the redundant system synchronises all programs automatically. For simplex configuration, back‑up the project to SD card in advance. One‑click restoration from SD card on the new module is available without PC downloading.
Q7: What is the maximum quantity of NFCP502‑W05 modules for one FCN cabinet?
A7: A single NFBU200 long backplane supports only two NFCP502‑W05 modules for one complete redundant control unit. Deployment of three or more CPU modules is not supported.
Q8: Can NFCP502‑W05 interface with Siemens SCADA systems?
A8: Yes. Four Ethernet ports allow independent network segmentation. Direct connection is available via native Modbus TCP and DNP3 protocols. Cross‑brand host‑system data exchange can also be realised with the FCN OPC server.
Recommended Models of the Same Series
NFCP501 2‑Port Standard CPU Module
NFCP502 4‑Port CPU Module (Main series for NFCP502‑W05)
NFBU200 Long‑form Mounting Backplane
NFPW444 24 VDC Wide‑temperature Power Supply Module
N2EB100 E2 Remote Expansion Bus Module
NFAI135 8‑Channel HART Isolated Analog Input Module
NFAR181 RTD Platinum Resistance Input Module
NFDV151 32‑Channel 24 VDC Digital Input Module
NFDR541 16‑Channel Relay Output Module
NFLF111 FOUNDATION Fieldbus Communication Module
NFLP121 PROFIBUS‑DP Communication Module
NFSB100 SB Backplane Repeater Module
NFAI543 16‑Channel Isolated Analog Output Module
NFLR121 RS485 Modbus Communication Module
NFCB301 SB Bus Connection Cable
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