Yokogawa ANT401-50 S1 Optical ESB Bus Repeater Master Module

Hardware Specifications

Yokogawa DCS ESB Optical Communication Features

The ANT401-50 S1 controls optical ESB signal conversion for CENTUM VP distributed control system communication. Therefore, it enables fiber optic transmission between ESB bus sections while maintaining electrical signal integrity.

The module uses optical communication to reduce the influence of electromagnetic interference on long-distance ESB connections. In addition, the fiber interface supports connection with optical ESB slave repeater modules such as the ANT502.

For Yokogawa process control networks, the module maintains dedicated ESB communication paths and supports distributed FCU configurations. Furthermore, the optical link structure allows flexible chain and star network arrangements according to system installation requirements.

The Yokogawa DCS architecture supports multiple field communication protocols, including 4-20 mA HART loop protocol, FOUNDATION Fieldbus, and Profibus PA interfaces through corresponding I/O modules. However, the ANT401-50 S1 performs ESB optical signal transmission rather than direct field instrument signal processing.

Frequently Asked Questions

Q: What is the primary function of the Yokogawa ANT401-50 S1 module?
A: The ANT401-50 S1 converts electrical ESB bus signals into optical signals and transmits ESB communication data through fiber optic cables.

Q: How many fiber cores are required for ANT401-50 S1 optical communication?
A: The module requires two fiber cores for optical ESB communication connections.

Q: Can the ANT401-50 S1 operate as an ESB bus terminator?
A: Yes. When the module terminates an electrical ESB bus section, the /CU1T connector unit with built-in terminator is used. The /CU1N connector unit is used for bus extension connections.

Field Installation Guidelines

Install the ANT401-50 S1 module inside the designated FCU hardware configuration, such as AFV30 or AFV40 units, according to Yokogawa system installation manuals.

Connect optical fiber cables between the ANT401-50 S1 master module and the corresponding optical ESB slave repeater module. Verify fiber polarity, connector cleanliness, and cable routing before system startup.

Keep optical communication cables separated from high-voltage power wiring and strong electromagnetic interference sources. Use proper grounding methods for the FCU cabinet and verify the ESB bus shielding arrangement.

Confirm connector unit selection before installation. Use the /CU1N option for ESB bus continuation and the /CU1T option when the electrical ESB segment requires termination.