Product Details
Product Overview
The Yokogawa NFSB100-S50 serves as the primary Safety Bus Coupler Module for the ProSafe-RS Safety Instrumented System (SIS). This critical component establishes the communication bridge between the Safety Control Station (SCS) and remote Safety Node Units. By utilizing Yokogawa's high-speed safety bus protocol, the NFSB100-S50 ensures deterministic data transport for emergency shutdown (ESD) and fire and gas (F&G) systems, maintaining the rigorous timing required for SIL3 applications.
Part Number Breakdown
Yokogawa specifies the functional profile of the NFSB100 through specific suffix and option codes:
| Code | Type | Description |
| NFSB100 | Model | Safety Bus Coupler Module |
| -S | Type | Standard Type |
| 5 | Style | Style Code 5 (Current hardware revision) |
| 0 | Always 0 | Basic Configuration |
Technical Specifications
The NFSB100-S50 maintains peak integrity for safety-critical communication paths:
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Manufacturer: Yokogawa
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System Platform: ProSafe-RS
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Function: Safety Bus Interface / Coupler
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Bus Support: ESB Bus / Optical ESB Bus (via repeater)
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Style Code: 50
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Installation: Occupies dedicated coupler slots in the Safety Control Unit
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Communication Speed: 128 Mbps (Safety-optimized)
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Condition: 100% Brand New and Original
Engineering Advantages
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SIL3 Certified Reliability: The NFSB100-S50 meets the strict hardware integrity requirements for Safety Integrity Level 3 (SIL3). It features extensive self-diagnostics that monitor the health of the safety bus in real-time, triggering a safe state if any communication discrepancy occurs.
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Deterministic Logic Execution: This module eliminates "network jitter" by providing a dedicated, high-speed path for safety signals. It ensures that the processor receives field data from remote safety nodes within fixed scan times, which is essential for high-speed trip sequences.
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Redundant Architecture Support: For maximum plant availability, the NFSB100-S50 operates in redundant pairs. If one coupler or bus cable fails, the system switches to the secondary unit without interrupting the safety logic, preventing nuisance trips.
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Enhanced Style 50 Revison: The Style 50 revision incorporates updated electronic components that improve thermal resilience and long-term stability in high-density I/O nests. This ensures the module maintains its 128 Mbps throughput even in peak ambient temperature conditions.
FAQs
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Is the Yokogawa NFSB100-S50 provided as new or refurbished?
We supply the NFSB100-S50 strictly as 100% Brand New and Original. Every unit is shipped in the original Yokogawa factory box with anti-static protection and factory seals intact to guarantee SIS integrity.
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Can I use the NFSB100-S50 in a standard CENTUM DCS?
No. The NFSB100-S50 is specifically designed for the ProSafe-RS safety system. While it shares some physical similarities with DCS couplers, the internal protocols are safety-rated and exclusive to the SIS architecture.
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Does this module support both local and remote nodes?
Yes. The NFSB100-S50 acts as the master interface. It connects to local safety nodes via standard ESB cables or to remote safety nodes (up to 50km) when paired with the appropriate optical fiber repeater modules.
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How do I replace an existing NFSB100 in a live system?
In a redundant configuration, the NFSB100-S50 supports online replacement. Ensure the "ACT" LED on the partner module remains steady before removing the faulty unit. Follow the ProSafe-RS maintenance manual to verify the new module synchronizes correctly before leaving the site.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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