Description

The Yokogawa NFCP502-W15 is a high-performance central processing unit (CPU) module acting as the core control processor within Yokogawa STARDOM FCN-500 autonomous controller platforms. It handles continuous regulatory loops, advanced batch sequences, and protocol processing inside automated industrial plants. Running on a fanless, low-power architecture, this processor features error-correcting memory and native high-speed communication routing over multi-node topologies. It is frequently applied in upstream oil and gas wellhead fields, pipeline monitoring, and utility distributed control nodes where high environmental tolerance and deterministic processing are critical.

Commercial and Lifecycle Logistics

+---------------------------+------------------------------------------------------------+
| Parameter                 | Value                                                      |
+---------------------------+------------------------------------------------------------+
| Product Condition         | New Original (Factory Sealed Surplus)                      |
| Warranty                  | 12-Month Comprehensive Warranty                            |
| Availability              | In Stock / Ready for Immediate Global Shipping             |
| Standard Lead Time        | 1–3 Business Days via DHL Express / FedEx / UPS            |
| Price Notice              | Price subject to market conditions; contact us for a firm  |
|                           | quote                                                      |
+---------------------------+------------------------------------------------------------+ 

Technical Specifications and Hardware Architecture

The exact configuration string NFCP502-W15 indicates a model fitted with extended firmware capabilities, an industrial-tier operating temperature footprint, and specific safety compliance frameworks.

Processor and Memory Allocation

• Processor: Intel Atom E3815 clocking at 1.46 GHz.
• Main Memory: 256 MB RAM equipped with Error-Correcting Code (ECC) to intercept and repair single-bit volatile data corruptions.
• Static RAM (SRAM): 2 MB battery-backed memory with ECC protection (dedicated to holding retention variables, process states, and active recipe parameters).
• Secondary/Onboard Storage: 1 GB embedded flash memory for local control application storage; contains 1 x external SDHC card slot (supporting 4 GB to 32 GB Class 10 cards) for automated data logging, parameter mirroring, and offline firmware restores.

Communication Framework and Bus Architecture

• Ethernet Communication: 4 x integrated 1 Gbps RJ45 Ethernet ports (supporting 10BASE-T/100BASE-TX/1000BASE-T). These links handle control networks, peer-to-peer data links, and SCADA connectivity.
• Serial Interface: 1 x isolated RS-232-C port via a standard D-sub 9-pin connector, operating at baud rates ranging from 0.3 kbps to 115.2 kbps for legacy RTU integrations.
• Backplane Interface: Proprietary high-speed SB Bus connection supporting direct dual/redundant configuration setups over the base unit backplane.

Electrical and Environmental Thresholds

• Internal Supply Voltage: 5 V DC \pm5% sourced via the companion NFBU200 or FCN baseplate module.
• Current Consumption: Maximum 1,700 mA draw at the internal 5 V DC level.
• Control Cycle Threshold: Minimum 20 ms deterministic logic scan time execution.
• Atmospheric Resilience: Built to satisfy ANSI/ISA S71.04 Class G2 harsh environment ratings for corrosive gas protection. Fanless convective cooling path design prevents dust entry.

Field Integration and Redundancy Constraints

Critical System Architecture Note:

To implement an ultra-reliable, hot-standby dual CPU redundancy layout on an FCN-500 baseplate, both installed CPU modules must share identical hardware suffix variants and identical style codes (e.g., matching Style S2 baseline hardware). Mismatching an NFCP502-W15 with an older NFCP501 or standard temperature module will halt backplane cross-synchronization.

• Extension Topologies via E2 Bus: When using Style S2 or higher variants of the NFCP502 module, the CPU can command up to 8 extension base units via specialized E2 Bus interface adapters. This extends the total physical footprint up to a maximum of 79 distinct I/O cards depending on your specific signal density layout.
• Software Design Ecosystem: Configuration and logic definition require Yokogawa’s Logic Designer package conforming directly to the IEC 61131-3 standard framework (supporting structured text, function block diagrams, and ladder logic architectures).
• HART Loop Multiplexing: The SB Bus layer driven by the NFCP502 natively transparently maps 4-20 mA HART digital instrument telemetry without introducing delay blocks into primary analog feedback execution paths.

Frequently Asked Questions (FAQ)

What does the “-W15” suffix signify compared to a standard “-W05” model?

The specific numerical characters at the end of the Yokogawa ordering code represent targeted variations in factory temperature thresholds and certification markings (such as specific explosion protection or marine certifications). Always verify your specific site environmental classification with the official Yokogawa hardware deployment manual to ensure matching thermal compliance.

How is a CPU module swap handled if a running unit develops a fault?

In a duplexed (redundant) FCN-500 layout, the backup module tracks the primary module in lockstep over the SB Bus backplane with a switchover penalty of \le 50 ms. If the primary module develops a fault, control transfers to the secondary unit automatically. The faulty unit can then be unlatched and removed while the backup card maintains plant operations.

Is the backup battery included with the module to retain the SRAM variables?

The CPU module includes an internal 1000 mAh graphite fluoride lithium battery to hold the 2 MB SRAM database intact during major station power drops. While shipping new-surplus units, battery isolation strips are checked to ensure battery life remains intact. It is standard maintenance practice to verify battery voltage indicators via the system maintenance console every 36 months.