Optical Communication Node Built for High-Availability Control Systems
The Yokogawa ANT401 Fiber Optic Bus Slave Module is a high-reliability communication interface designed to extend and stabilize ESB bus networks within Yokogawa distributed control systems. It converts electrical ESB signals into optical transmission, enabling long-distance, noise-immune communication between field control units and remote I/O nodes.
Engineered for large-scale industrial automation, the ANT401 plays a key role in ensuring deterministic data exchange across complex process environments where signal integrity, redundancy, and system scalability are essential.
Technical Specifications
| Parameter | Specification |
|---|
| Model | ANT401 |
| Module Type | Fiber Optic Bus Slave Module |
| System Architecture | ESB Bus / Optical ESB Bus |
| Communication Medium | Dual-core optical fiber |
| Transmission Distance | Up to 5 km (system dependent) |
| Connection Topology | Chain / star configuration |
| Fiber Type | Single-mode optical fiber |
| Connector Type | LC connector |
| Redundancy Support | Yes (dual bus configuration) |
| Signal Conversion | Electrical ESB ↔ Optical ESB |
| Installation Type | Field Control Unit / Node Unit rack |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -20°C to 70°C |
| Humidity Range | 5% to 95% RH (non-condensing) |
| Dimensions (H × W × D) | Approx. 142.5 × 130 × 32.8 mm |
| Weight | Approx. 0.3 kg |
Industrial Applications
The ANT401 is widely used in large distributed control environments where reliable long-distance communication is required. It is commonly deployed in:
-
Oil and gas production and offshore platforms
-
Petrochemical and refining plants
-
Power generation and transmission systems
-
Large-scale process manufacturing facilities
-
Remote I/O and control cabinet expansion systems
Its optical transmission capability ensures stable communication even in environments with high electromagnetic interference or physically dispersed equipment layouts.
Key Advantages and Engineering Value
One of the primary advantages of the ANT401 is its optical signal conversion capability, which significantly improves communication stability by eliminating electrical noise interference.
Its support for dual redundant ESB bus architecture enhances system reliability, ensuring uninterrupted data transmission even in the event of a communication path disruption.
The module also supports flexible topology design, including chain and star configurations, allowing engineers to design scalable and optimized network structures for different plant layouts.
In addition, its compact rack-mounted design simplifies integration into existing Yokogawa control systems, reducing installation complexity and supporting seamless system expansion.
Technical FAQs
1. What is the main function of the ANT401?
It converts ESB bus electrical signals into optical signals for long-distance communication.
2. What is the maximum transmission distance?
Up to 5 km depending on system configuration.
3. Does it support redundancy?
Yes, it supports dual-redundant ESB bus communication.
4. What type of fiber is used?
Single-mode dual-core optical fiber.
5. What systems is it compatible with?
Yokogawa CENTUM and ESB-based distributed control systems.
6. What is its role in the system architecture?
It acts as a slave communication node in the optical ESB bus network.
7. What topologies are supported?
Both chain and star configurations are supported.
8. What is the installation method?
Rack-mounted installation within field control or node units.
9. What ensures signal stability?
Optical transmission eliminates electromagnetic interference.
10. What industries commonly use this module?
Oil & gas, petrochemical, power generation, and process manufacturing industries.
A DCS Q Co., Ltd. - PLC and DCS Industrial Control Equipment Wholesale
