Description:
100% Original Yokogawa SEC401-51, a high-performance ESB bus coupler module with ESB bus master interface function. Features 128 Mbps high-speed data transmission, supports up to 9 connectable units, and integrates multiple protection functions, ensuring stable and reliable operation in harsh industrial environments. Ideal for process control and safety monitoring systems in petrochemical, power, pharmaceutical and other industries.
- High-Speed & Efficient Transmission:128 Mbps data transmission rate ensures fast and smooth data exchange between I/O modules, improving the real-time performance of the control system.
- Reliable Connection Capability: Supports up to 9 connectable units, enabling flexible expansion of the industrial control system to meet different scale application needs.
- Strong Environmental Adaptability: Adopts high-quality materials and exquisite craftsmanship, ensuring stable operation in harsh industrial environments such as high temperature, humidity and strong interference.
- Comprehensive Protection Functions: Equipped with overload, overvoltage and short-circuit protection, effectively preventing potential safety risks and equipment damage, extending the service life of the module.
- Easy Integration & Maintenance: Compatible with various PLC, DCS and industrial automation control systems, supports multiple programming languages and communication protocols, facilitating system integration, maintenance and debugging.
- Genuine Assurance: 100% original Yokogawa product with 12-month warranty, ensuring product quality and after-sales support
Application Scenarios:
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The Yokogawa SEC401-51 ESB Bus Coupler Module is widely used in various fields requiring automated control and monitoring, especially suitable for:
- Process control systems in petrochemical, electric power, pharmaceutical and other process industries.
- Sequence control and safety protection occasions in industrial production lines.
- Expansion and upgrading of Yokogawa and other brand PLC/DCS systems, realizing stable connection and data transmission between modules.
- Automated monitoring systems in harsh industrial environments that require high reliability and stability.

Q1:What is the product situation and warranty like?
A:Brand-new genuine items. 1-year warranty included.
Q2:What is your payment terms?
A:T/T, Paypal supported.
Q3: What is the delivery time for the product? Is there sufficient inventory?
A:Standard models in stock, shipped in 3–5 business days after payment. Scarce models require manufacturer ordering—contact customer service for timelines.
Q4:Shipping & Tracking
A:DHL/FedEx/UPS available.Tracking number + link provided post-shipment. Full-process monitoring by our team.
Q5:Packaging & Safety
A:Original brand packaging with reinforced protection (foam, sealed cartons, wooden crates for precision gear). Moisture & impact resistant.