ANT401-50/CU1T | Yokogawa | Optical ESB Bus Repeater Master Module

Yokogawa ANT401‑50/CU1T Optical ESB Bus Repeater Master Module

The Yokogawa ANT401‑50/CU1T is an optical ESB Bus Repeater Master Module designed for long‑distance ESB bus extension in Yokogawa control networks. As a 5‑km optical repeater, it enables reliable ESB communication across distributed control cabinets and remote I/O segments.

Technical Specifications

Functional Description

The ANT401‑50/CU1T serves as a master‑side optical repeater for Yokogawa ESB Bus systems. It converts electrical ESB bus signals into optical signals for long‑distance transmission and reconverts them at the receiving end. This ensures stable, noise‑immune communication across extended plant layouts.

Key Functional Behaviors

• Optical ESB Bus Repeating Converts ESB electrical signals to optical format for up to 5 km transmission.
• Master‑Side Repeater Role Designed for the master side of ESB bus segments, typically paired with a corresponding optical repeater on the remote end.
• Connector Unit /CU1T Includes a terminator‑equipped connector unit ensuring proper ESB bus impedance and signal integrity.
• Standard Type (5) No explosion‑proof rating; intended for general industrial environments.
• Basic Type (0) Standard functional configuration without additional protective options.

Frequently Asked Questions

Q: What does the “50” in ANT401‑50 mean? A: It indicates the 5‑km optical transmission capability.

Q: What is the purpose of the /CU1T suffix? A: It specifies the connector unit with an ESB bus terminator, required for proper bus termination and stable communication.

Q: Can the ANT401‑50/CU1T be used in hazardous areas? A: No. The “5” suffix indicates no explosion protection.

Field Installation Guidelines

• Ensure proper seating of the CU1T connector unit to maintain ESB bus termination.
• Route optical fiber away from high‑voltage cables to avoid mechanical stress and accidental damage.
• Maintain correct fiber bend radius to preserve optical transmission quality.
• Follow Yokogawa grounding and shielding practices for ESB bus segments.
• Verify optical link continuity after installation, especially for long‑distance runs.