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Product Introduction
The Yokogawa SNT401-53 is an Optical ESB Bus Repeater Module designed to enhance the communication capabilities and network scalability of Yokogawa’s CENTUM VP and CS 3000 process control systems. This module is specifically engineered to repeat and regenerate optical signals along the ESB (Ethernet for Safety Bus) bus, ensuring high-integrity data transmission over long distances and in complex network topologies.
By converting weakened optical signals into strong, clean outputs, the SNT401-53 allows for flexible architecture layouts while maintaining synchronization and data accuracy between remote I/O units and controller subsystems. The device supports multi-segment configurations, making it ideal for large process facilities where communication distances often exceed standard optical cable limits.
With its robust construction, high-speed performance, and seamless integration into Yokogawa’s DCS ecosystem, the SNT401-53 is a critical component for reliable and scalable process automation networks.
Product Specifications
| Parameter | Specification |
|---|---|
| Model Number | SNT401-53 |
| Product Type | Optical ESB Bus Repeater Module |
| Supported Protocol | Optical ESB Bus (Ethernet-based Safety Bus) |
| Input Ports | 1 Optical input port |
| Output Ports | 2 Optical output ports |
| Data Transfer Rate | 100 Mbps (Full Duplex) |
| Transmission Medium | Multimode optical fiber |
| Supported Fiber Length | Up to 2 km per segment (depending on fiber type) |
| Wavelength | 1300 nm |
| Optical Connector Type | ST-type optical connectors |
| Operating Voltage | Supplied via baseplate |
| Power Consumption | Approx. 4 W |
| Status Indicators | Optical link status, power, and fault LEDs |
| Operating Temperature Range | 0°C to +50°C |
| Storage Temperature Range | -20°C to +70°C |
| Humidity Range | 5% to 95% RH (non-condensing) |
| Environmental Protection | Conforms to IEC 61000-4 EMC standards |
| Housing Material | Metal enclosure |
| Mounting | DIN-rail or baseplate mounting (standard Yokogawa system rack) |
| Dimensions (H x W x D) | 142.5 x 130 x 32.8 mm |
| Weight | 0.3 kg |
| Certifications | CE, RoHS compliant |
Applications
The Yokogawa SNT401-53 Optical ESB Bus Repeater Module is deployed in a wide range of process industries for improving communication reliability and flexibility:
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Oil & Gas Processing: Large-scale plant-wide networks with distant field instrumentation.
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Petrochemical & Chemical Plants: Multi-segment DCS architecture.
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Power Generation: Supporting complex control networks in power stations.
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Pharmaceutical Manufacturing: Enhancing network redundancy and signal quality.
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Water and Wastewater Treatment: Extending network coverage to remote treatment facilities.
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Steel and Metallurgy Plants: Reliable control networks in harsh industrial environments.
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Food and Beverage Industry: Supporting long-distance and high-reliability communications.
Advantages
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Reliable Long-Distance Communication: Extends the reach of ESB optical networks up to 2 km per segment.
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Enhanced Signal Integrity: Repeats and regenerates optical signals, reducing errors and data loss.
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Flexible Network Architecture: Supports multi-segment layouts for large and distributed systems.
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Compact & Robust Design: Suitable for industrial environments with space limitations.
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Seamless Integration: Designed for compatibility with Yokogawa’s CENTUM VP and CS 3000 systems.
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Low Power Consumption: Efficient operation with minimal energy usage.
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Simple Installation & Maintenance: DIN-rail and baseplate mounting options.
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Status LEDs: Provides clear visual indication of link status and operational health.
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Standards Compliance: Meets IEC EMC standards for electromagnetic immunity.
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Future-Proof: Supports the scalability of process control networks as plant requirements evolve.
Frequently Asked Questions (FAQ)
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What is the main purpose of the SNT401-53?
It extends and regenerates optical ESB Bus signals to ensure reliable data transmission over long distances. -
Which Yokogawa systems is this module compatible with?
Compatible with CENTUM VP and CS 3000 process control systems. -
How many output ports does it provide?
The module provides two optical output ports. -
What type of fiber is supported?
Supports multimode optical fiber. -
What is the maximum fiber length supported?
Up to 2 km per segment, depending on the fiber type. -
Can it be mounted on a DIN rail?
Yes, it supports DIN rail or baseplate mounting. -
What type of optical connectors does it use?
ST-type optical connectors. -
What is the operating temperature range?
From 0°C to +50°C. -
Does it comply with EMC standards?
Yes, it conforms to IEC 61000-4 EMC standards. -
Is this module RoHS compliant?
Yes, the SNT401-53 is RoHS compliant.
Related Models (Same Series / Related)
| Model Number | Product Type | Key Features |
|---|---|---|
| SNT401-50 | Optical ESB Bus Repeater Module | Standard version |
| SNT401-51 | Optical ESB Bus Repeater Module | Enhanced segment capacity |
| SNT401-52 | Optical ESB Bus Repeater Module | Extended range capability |
| SNT401-54 | Optical ESB Bus Repeater Module | High EMI immunity |
| SNT401-55 | Optical ESB Bus Repeater Module | Optimized for offshore and marine |
| SNT411-53 | Optical ESB Bus Interface Module | Interface module with advanced diagnostics |
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