Product Introduction
The Yokogawa ANT401-50 S1 Optical ESB Bus Repeater Master Module is a high-performance communication interface designed to extend and convert ESB bus signals into optical transmission within Yokogawa distributed control systems. It is part of the ESB Bus Repeater solution used in large-scale industrial automation networks to ensure stable, long-distance, and noise-immune data communication between control nodes.
By converting electrical ESB signals into optical signals, the module significantly enhances communication reliability and allows system expansion across distant field units, making it essential for complex DCS architectures in process industries.
Technical Specifications
| Parameter | Details |
|---|
| Manufacturer | Yokogawa |
| Model | ANT401-50 S1 |
| Module Type | Optical ESB Bus Repeater Master Module |
| Function | ESB electrical-to-optical signal conversion |
| Transmission Distance | Up to 5 km (with ANT502 slave module) |
| Communication Topology | Chain type / Star type |
| Max Connection Stages | 2 (chain configuration) |
| Max Node Connections | Up to 8 paired modules |
| Optical Fiber Type | Single-mode quartz fiber (LC connector) |
| Current Consumption | ~0.5 A |
| Weight | ~0.2–0.25 kg |
| Dimensions | Approx. 3.2 × 11.4 × 6.3 cm |
| Installation | Field Control Unit / Node Unit / Repeater Unit |
Product Function Overview
The ANT401-50 S1 plays a critical role in expanding ESB network architecture by:
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Converting electrical ESB signals into optical signals
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Extending communication range up to 5 km using fiber optics
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Enabling stable long-distance data transmission in noisy industrial environments
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Supporting scalable DCS network expansion across large facilities
It is typically paired with the ANT502 slave module to complete the optical communication loop.
Key Advantages
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Long-Distance Communication Capability: Extends ESB bus transmission up to 5 km without signal degradation
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High Noise Immunity: Optical transmission eliminates electromagnetic interference issues
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Flexible Network Topology: Supports both chain and star configurations
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Stable Industrial Performance: Designed for continuous operation in harsh environments
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Scalable Architecture: Enables expansion of large distributed control systems
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Compact and Lightweight Design: Easy integration into existing Yokogawa racks
This module enhances system reliability while supporting large-scale automation architecture upgrades.
Technical FAQs
1. What is the main function of ANT401-50 S1?
It converts ESB bus electrical signals into optical signals for long-distance communication.
2. What is its maximum transmission distance?
Up to 5 km when paired with ANT502 modules.
3. What systems is it used in?
Yokogawa DCS and field control systems (FCS, FIO nodes).
4. Does it support fiber optic communication?
Yes, it uses single-mode optical fiber with LC connectors.
5. What is the typical weight?
Around 0.2–0.25 kg depending on configuration.
6. How many connections does it support?
Up to 8 paired node connections in combined topologies.
7. What is the installation environment?
Field control units, node units, or repeater racks.
8. Does it require pairing with another module?
Yes, typically with ANT502 slave module for full operation.
9. Why is optical conversion important?
It improves signal stability and eliminates electrical noise interference.
10. What industries commonly use it?
Power plants, oil & gas, petrochemical, and large-scale manufacturing systems.
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