Products Description
The Yokogawa SNT501-13 is an optical ESB bus repeater module designed to enhance communication within industrial automation systems. It extends the transmission distance of the ESB bus while boosting signal strength. This functionality ensures stable, uninterrupted data flow between devices. The module is built for reliability, making it ideal for use in industrial and process control systems. Its design supports both star and chain-type network configurations, offering flexible installation options.
Technical specifications

Function: ESB Bus optical transport function
Connection method: Star type connection
Chain type connection
Available for both star and chain type connection.
Number of connecting stage: Maximum two
Transmission distance: Maximum 5 km (total two stages)
In case of Vnet/IP system with the R1.03 or later,
the total distance of two stagesis maximum 10 km.
Current consumption: 0.5 A
Key Features
- Signal Amplification for Long-Distance Communication:The SNT501-13 Optical ESB Bus Repeater Module is designed to regenerate and amplify optical signals, allowing reliable communication over long distances in distributed control systems (DCS). This ensures that data remains accurate even as it travels through extended network segments.
- Improved Data Integrity with Optical Transmission:Utilizing optical fiber technology, the SNT501-13 minimizes the risk of electromagnetic interference, ensuring that data integrity is preserved even in environments with high electrical noise. This makes it ideal for industrial applications where signal clarity is crucial.
- Seamless Integration into ESB Networks:The module seamlessly integrates with Yokogawa's Enhanced Smart Field (ESB) networks, enabling smooth coupling of different network segments. It helps to expand and enhance the communication capabilities of large-scale industrial systems.
- Compact and Robust Design:Designed for industrial environments, the SNT501-13 features a compact and rugged build. It is built to withstand harsh operating conditions, including high temperatures and vibrations, while maintaining long-term reliability.
- Easy Installation and Maintenance:The module is designed with user-friendly features for easy installation and low-maintenance operation. It is equipped with diagnostic tools that allow operators to quickly identify issues and ensure that the system is running optimally.
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FAQ
Frequently Asked Questions (FAQ)
Q1: What is the primary function of the SNT501-13 module?
A1: The SNT501-13 module amplifies and regenerates optical signals in an ESB network, enabling reliable long-distance communication between different network segments without signal degradation.
Q2: How does the optical transmission benefit the system?
A2: Optical transmission is immune to electromagnetic interference, which significantly improves data integrity and reliability, particularly in environments with high electrical noise, common in industrial facilities.
Q3: Can the SNT501-13 be used with existing ESB systems?
A3: Yes, the SNT501-13 is fully compatible with Yokogawa's ESB networks, making it easy to integrate with existing systems and extend the communication range.
Q4: How does the SNT501-13 module perform in harsh environments?
A4: The module is built to endure tough industrial environments. Its rugged design ensures reliable performance even under extreme temperature fluctuations, vibrations, and electromagnetic interference.
Q5: Is the SNT501-13 module easy to maintain?
A5: Yes, the SNT501-13 requires minimal maintenance. It is equipped with diagnostic tools that help identify network issues, allowing for quick troubleshooting and ensuring the system remains operational with minimal downtime.
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