Yokogawa STB4D-10 S2 Dual-Redundant Digital I/O Terminal Block – STB Safety Terminal Block Series
In high-stakes industrial environments — oil refineries, chemical plants, and power generation facilities — a single point of failure in the I/O subsystem can cascade into unplanned shutdowns, safety incidents, and millions in lost production. When a digital I/O terminal block fails without redundancy, field signals go dark, operators lose visibility, and control loops break open. The Yokogawa STB4D-10 S2 eliminates this risk by delivering hardware-level dual redundancy at the terminal block layer, ensuring continuous signal integrity even when one channel path is compromised.
The STB4D-10 S2 occupies a critical position within Yokogawa’s STB (Safety Terminal Block) series — a product line engineered specifically for safety instrumented systems (SIS) and high-availability distributed control systems (DCS). As global process industries push toward IEC 61511 compliance and zero-unplanned-downtime targets, the STB series has become a benchmark for redundant I/O architecture. The STB4D-10 S2 variant, with its dual-redundant digital channel configuration, is widely deployed across CENTUM VP and ProSafe-RS platforms in more than 80 countries worldwide.
Technical Specifications
- Part Number / SKU: STB4D-10 S2
- Manufacturer: Yokogawa Electric Corporation
- Series: STB (Safety Terminal Block)
- Type: Dual-Redundant Digital I/O Terminal Block
- Redundancy Architecture: Dual-redundant channel design
- Signal Type: Digital Input / Digital Output
- Compatible Systems: Yokogawa CENTUM VP, ProSafe-RS, STARDOM
- Mounting: DIN rail compatible
- Weight: Approx. 400 g
- Compliance: Designed for IEC 61511 / IEC 61508 SIL-rated applications
Note: All specifications are based on Yokogawa official documentation. Contact us for the full datasheet.
Key Features & Benefits
- Dual-Redundant Architecture: Two independent signal paths ensure continuous operation even if one path fails — critical for SIL 2/3 safety loops.
- Hot-Swap Capability: Supports online replacement without process interruption, minimizing maintenance downtime.
- High Signal Integrity: Engineered to suppress noise and maintain accurate digital signal transmission in electrically harsh industrial environments.
- Compact DIN-Rail Design: Space-efficient form factor simplifies panel layout in both new builds and retrofit projects.
- Seamless DCS/SIS Integration: Plug-and-play compatibility with Yokogawa CENTUM VP and ProSafe-RS reduces commissioning time.
- Long Service Life: Built to Yokogawa’s industrial-grade quality standards for 10+ year operational lifecycles.
- Traceability: Each unit carries full manufacturing traceability for audit and compliance documentation.
Industry & Equipment Applications
- Oil & Gas: Wellhead control panels, pipeline SCADA, offshore platform safety systems
- Petrochemical & Refining: Reactor safety interlocks, emergency shutdown (ESD) systems
- Power Generation: Turbine control, boiler management, grid protection relay interfaces
- Chemical Processing: Batch control systems, hazardous area I/O marshalling
- Pulp & Paper / Water Treatment: High-availability process control with redundant I/O requirements
- Pharmaceutical: FDA-compliant manufacturing lines requiring validated I/O hardware
System Integration & Compatible Parts
The STB4D-10 S2 is designed to integrate directly into Yokogawa’s modular I/O ecosystem. Compatible and commonly paired components include:
- Yokogawa ProSafe-RS Safety Controller modules
- Yokogawa CENTUM VP Field Control Stations (FCS)
- STB series analog and digital I/O modules (STB4A, STB4D variants)
- Yokogawa ESB Bus couplers and I/O expansion units
- Standard IEC 60947-compliant terminal accessories
Contact our technical team to verify compatibility with your specific system revision and firmware version.
Our Quality Assurance Process
- Source Verification: All Yokogawa parts are sourced from authorized distributors or directly from Yokogawa-certified supply chains.
- Visual & Functional Inspection: Every unit undergoes physical inspection for label integrity, connector condition, and housing damage before shipment.
- Authenticity Check: Serial numbers and date codes are cross-referenced against manufacturer records where applicable.
- Secure Packaging: Anti-static packaging with moisture barrier protection for safe international transit.
- Documentation: Certificate of conformance and packing list provided with every order.
How to Order
- Submit your inquiry via the Contact / RFQ form on this page.
- Provide your required quantity, delivery timeline, and destination country.
- Our team will respond within 24 business hours with availability, lead time, and a formal quotation.
- Upon order confirmation, we arrange secure packaging and international logistics.
- Tracking information and shipping documents are provided upon dispatch.
📧 Email: support@konmask.com | 📞 WhatsApp/Tel: +0086 19859288691
Why Choose Konmask.com?
- ✅ Specialized in Industrial Automation: We focus exclusively on PLC, DCS, and SIS components — not a generalist marketplace.
- ✅ Global Sourcing Network: Access to hard-to-find and obsolete Yokogawa parts through our verified supplier network.
- ✅ B2B Inquiry-First Model: No pressure purchasing — get a quote, verify specs, then decide.
- ✅ Export Documentation: Full support for commercial invoices, packing lists, and customs documentation for international buyers.
- ✅ Technical Pre-Sales Support: Our engineers can assist with compatibility verification before you commit to an order.
Frequently Asked Questions
- Q: Is the STB4D-10 S2 compatible with ProSafe-RS R3.xx firmware?
- A: The STB4D-10 S2 is designed for the ProSafe-RS platform. Please contact us with your specific firmware revision for a compatibility confirmation.
- Q: Do you supply new or refurbished units?
- A: We primarily supply new-in-box units. Refurbished or tested-used units may be available for obsolete stock — please specify your requirement in the inquiry.
- Q: What is the typical lead time?
- A: Lead time varies by stock availability. In-stock items typically ship within 3–5 business days. For out-of-stock items, lead time is quoted individually.
- Q: Can you provide a certificate of conformance?
- A: Yes. A certificate of conformance is included with every shipment as standard.
- Q: Do you accept orders from outside China?
- A: Yes. We ship globally and have experience with export documentation for North America, Europe, Southeast Asia, and the Middle East.
© 2026 Konmask.com. All rights reserved.
Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
