SNT401-13 | Yokogawa CENTUM VP Optical ESB Bus Repeater Master Module

Product Overview

The Yokogawa SNT401-13 serves as a high-speed Optical ESB Bus Repeater Master Module for the CENTUM VP integrated production control system. This module converts electrical signals into optical pulses to extend the ESB bus network beyond the limitations of copper cabling. It enables the Field Control Station (FCS) to communicate with remote I/O nodes across significant distances. We supply this unit as 100% Brand New and Original, ensuring peak network performance and system synchronization for your DCS infrastructure.

Part Number Breakdown

Technical Specifications

Engineering Advantages

• Immunity to EMI/RFI: By utilizing optical fiber for data transmission, the SNT401-13 completely eliminates electromagnetic interference and radio frequency noise. This ensures stable data throughput even when routing cables through electrically "noisy" industrial environments near large motors or switchgear.

• Long-Distance Connectivity: This module bypasses the strict length constraints of standard copper ESB cables. It allows engineers to place remote I/O nodes in separate buildings or distant sections of the plant while maintaining real-time control synchronization.

• Total Galvanic Isolation: The optical link provides a physical break in the electrical circuit between nodes. This isolation protects the central control station from ground loops and high-voltage surges that may occur at remote field locations.

• Ultra-Slim Profile: At only 2.2 cm wide, the SNT401-13 maximizes slot density within the FCS rack. This compact footprint allows for redundant master configurations without requiring additional base units or cabinet expansion.

FAQs

• Does the SNT401-13 require a slave module to function?

  Yes. You must pair the SNT401-13 (Master) with a corresponding Optical ESB Bus Repeater Slave Module (such as the SNT501 series) located at the remote node side to establish the complete optical link.

• Can I hot-swap this module during operation?

  In a redundant configuration, you can replace a faulty SNT401-13 without shutting down the FCS. However, always verify that the standby module holds the active communication link before removing the unit to prevent bus interruption.

• What type of optical fiber connector does this module use?

  The SNT401-13 typically utilizes specific connectors designed for industrial quartz fiber optics. Refer to your system engineering manual to ensure your patch cables match the -13 style port requirements.

• What is the primary difference between Style 2 and Style 3 versions?

  The Style 3 (-13) version incorporates updated electronic components for improved thermal management and long-term reliability. It maintains full backward compatibility with systems designed for earlier SNT401 styles.