Yokogawa ANT401-50 S1 Optical ESB Bus Repeater Module

The Yokogawa ANT401-50 S1, also cataloged as the ANT401 Optical ESB Bus Repeater Module, operates as a dedicated hardware component for converting and transmitting ESB bus signals over optical media within CENTUM VP/CS 3000 systems.

Suffix Breakdown & Model Matrix

• ANT401: Base designator for the Optical ESB Bus Repeater Master Module.
• -50: Specifies the maximum transmission range configuration of up to 5 km over optical fiber cabling.
• S1: Designates the specific hardware revision and assembly standard.

Hardware Specifications

Process Control and DCS Instrumentation

• Channel-to-Channel Isolation: Built-in optical transceiver circuits establish galvanic isolation between the local electrical backplane and the remote fiber nodes. This design isolates common-mode voltage spikes and ground potential differences across distance runs of up to 5 km.
• Deterministic Signaling Loop: The module translates electrical ESB bus transitions to corresponding optical light pulses without introducing software protocol latency, maintaining synchronous, high-velocity signal execution between the master Field Control Station (FCS) and remote FIO nodes.

Frequently Asked Questions

Q: How is the physical ESB bus termination configured on the module housing? A: When the ANT401 module is positioned at the absolute end of the physical ESB bus chain, it must be mated with the A2EE2A-T adapter (connector unit with terminator). For standard inline non-terminated transit paths, use the A2EE2A-N adapter.

Q: What are the target mounting slot locations for the repeater module inside an FIO node? A: The master repeater module can be installed directly in the Field Control Unit or ESB Bus Node Unit within designated communication-ready FIO slots, linking to an ANT502 slave module via duplex fiber optic cables.

Field Installation Guidelines

• Fibre Optic Bend Radius Limits: When routing the duplex optical fiber cabling between the ANT401 master and ANT502 slave modules, maintain a minimum dynamic bending radius of 30 mm. Sharp bends will cause attenuation spikes and disrupt optical transmission.
• Connector Adapter Alignment: Ensure the adapter modules (A2EE2A-N or A2EE2A-T) are seated flush against the front interfaces of the module. Tighten all integrated capture screws evenly to secure the physical connection to the copper ESB bus segment.
• Anti-Static Enclosure Measures: Always utilize an electrostatic discharge (ESD) wrist strap grounded to the cabinet chassis before handling the module to prevent localized voltage discharges from destroying the integrated optical transceiver diodes.