Product Description

The Yokogawa SNT401-53 S1 is a high-performance optical bus repeater module designed for long-distance extension of the ESB (Extended Serial Backplane) bus in distributed control systems like CENTUM VP. It converts electrical ESB signals into optical signals, enabling noise-immune transmission over fiber optic links.

The module allows remote I/O nodes to be located beyond the distance limits of standard copper cabling. The S53 designation indicates a standard-type module with G3-compliant conformal coating for enhanced protection in corrosive industrial environments, while the S1 suffix denotes the specific hardware revision.

Technical Specifications

Application Scenarios

The SNT401-53 S1 is used in large-scale industrial installations where remote I/O nodes must be linked over long distances, including:

• Offshore platforms

• Large chemical refineries

• Power generation plants

It ensures stable, interference-free control bus communication in environments with high electromagnetic noise or extensive cable runs.

FAQ

Q: Does the SNT401-53 S1 support redundant bus links?
Yes. In a redundant ESB bus architecture, a pair of SNT401 modules provides independent optical paths, ensuring full system availability if one fiber path fails.

Q: What is the maximum distance supported by this optical repeater?
Distance depends on the fiber type and system configuration. Typically, it supports 500 meters up to 5 kilometers or more with the appropriate transceivers.