YOKOGAWA SB401-50 – Bus Interface Slave Module | STARDOM / FA-M3 Platform
Engineering Background
The YOKOGAWA SB401-50 is a dedicated bus interface slave module designed for integration within YOKOGAWA’s distributed control and field automation architectures. It serves as a critical communication bridge between field-level devices and the supervisory control layer, enabling deterministic, high-integrity data exchange across industrial bus networks. This module is engineered to meet the rigorous demands of continuous-process industries where signal fidelity and system uptime are non-negotiable.
Product Positioning
The SB401-50 is positioned as a slave-side interface component within YOKOGAWA’s FA-M3 / STARDOM control platform ecosystem. It is the preferred choice for procurement engineers who require a proven, OEM-sourced bus interface solution with full compatibility guarantees, traceable quality documentation, and long-term supply chain reliability. Konmask stocks and sources this module with full verification to support MRO, capital project, and emergency replacement procurement scenarios.
Complete Technical Specifications
| Manufacturer | YOKOGAWA Electric Corporation |
| Part Number | SB401-50 |
| Module Type | Bus Interface Slave Module |
| Compatible Platform | YOKOGAWA FA-M3 / STARDOM Series |
| Bus Protocol | YOKOGAWA Proprietary Field Bus (Slave Node) |
| Communication Role | Slave (field-side node) |
| Mounting | DIN Rail / Backplane slot (platform-dependent) |
| Operating Temperature | 0°C to +55°C |
| Storage Temperature | -25°C to +70°C |
| Relative Humidity | 5% to 95% RH (non-condensing) |
| Power Supply | Supplied via backplane bus |
| Weight | Approx. 300 g |
| Certifications | CE, UL (platform-level) |
| RoHS Compliance | Compliant |
| Country of Origin | Japan |
Note: Specifications are reference values. Always verify against the official YOKOGAWA SB401-50 datasheet for your specific application revision.
Proven Application Environments
- Oil & Gas: Upstream/downstream DCS slave node integration for flow, pressure, and temperature loop control
- Chemical & Petrochemical: Continuous process bus communication in hazardous-area-adjacent control panels
- Power Generation: Turbine and boiler control system bus expansion via slave interface
- Pulp & Paper / Water Treatment: FA-M3 distributed I/O bus slave node for multi-loop process control
- Pharmaceutical Manufacturing: GMP-compliant automation bus interface for batch process systems
- MRO & Spare Parts: Direct replacement for aging SB401-50 units in existing YOKOGAWA installations
Engineering Advantages
- Deterministic Bus Communication: Slave-side architecture ensures predictable scan-cycle response, critical for real-time process control
- Seamless Platform Integration: Plug-compatible with YOKOGAWA FA-M3 and STARDOM controller backplanes — no firmware patching required
- High Noise Immunity: Designed for industrial EMC environments with robust signal isolation on the bus interface
- Compact Form Factor: Optimized for high-density panel installations without sacrificing thermal performance
- Long Product Lifecycle: YOKOGAWA’s extended support policy ensures parts availability and firmware compatibility over multi-decade plant lifecycles
- Diagnostic Transparency: Onboard status indicators enable rapid fault isolation without specialized tools
System Architecture & Signal Flow
In a typical YOKOGAWA FA-M3 or STARDOM deployment, the SB401-50 operates as a slave node on the internal field bus. The master controller (e.g., F3SP series CPU) initiates cyclic polling; the SB401-50 responds with field I/O data and accepts setpoint/command writes from the master. Signal flow is unidirectional per cycle: Master → Bus → SB401-50 Slave → Field Device I/O, with acknowledgment frames returned to the master for integrity verification. This architecture supports deterministic latency budgets required by IEC 61511 SIL-rated process loops.
Sourcing & Quality Verification
- Origin: Sourced from authorized YOKOGAWA distribution channels and verified MRO supply networks
- Inspection: Each unit undergoes visual inspection, label verification, and functional pre-check prior to dispatch
- Documentation: Certificate of conformity and traceability documentation available upon request
- Condition: New (factory-sealed) or Refurbished (tested, warranted) — specify at time of inquiry
- Anti-Counterfeit: Konmask applies a zero-tolerance policy on counterfeit components; all units are cross-referenced against YOKOGAWA OEM markings
Procurement Process
- Submit Inquiry: Contact support@konmask.com or call +0086 19859288691 with your required quantity and delivery timeline
- Quotation: Receive a formal quotation within 1 business day including unit price, lead time, and shipping options
- Order Confirmation: Issue PO against the quotation; Konmask confirms stock availability and dispatch schedule
- Quality Check & Dispatch: Unit inspected, packed, and shipped with tracking and documentation package
- After-Sales Support: Technical support available post-delivery for integration queries and warranty claims
Technical FAQ
Q: Is the SB401-50 compatible with both FA-M3 and STARDOM platforms?
A: The SB401-50 is designed for YOKOGAWA’s bus interface architecture. Compatibility depends on the specific controller revision and backplane configuration. Please provide your existing system model numbers when inquiring to confirm fit.
Q: Can this module be used as a master node?
A: No. The SB401-50 is a slave-only interface module. Master bus control functions are handled by the CPU or dedicated master interface modules in the YOKOGAWA platform.
Q: What is the lead time for the SB401-50?
A: Lead time varies by stock availability. In-stock units ship within 3–5 business days. For out-of-stock scenarios, typical lead time is 4–8 weeks via authorized supply channels. Contact us for real-time availability.
Q: Do you provide a warranty?
A: Yes. New units carry the standard YOKOGAWA OEM warranty. Refurbished units are covered by Konmask’s 90-day functional warranty. Extended warranty options are available upon request.
Q: Can I request a datasheet or wiring diagram?
A: Yes. Official YOKOGAWA technical documentation is available upon request for verified B2B buyers. Contact our technical team with your application details.
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Contact: support@konmask.com | +0086 19859288691
