Yokogawa ANT502-10 Bus Repeater Module: CENTUM CS 3000 & VP Series

Technical Dossier

Product Details And Specifications

Yokogawa ANT Series Technical Notes

The Yokogawa ANT series encompasses the bus repeater and field network interface modules deployed within the CENTUM CS 3000 and CENTUM VP Distributed Control Systems (DCS). These platforms hold a dominant installed base across global heavy industries including petrochemical complexes, nuclear power facilities, LNG terminals, and crude oil refineries. The ANT series modules serve as the physical and logical backbone of the V-net/IP and ESB (Engineering Station Bus) communication infrastructure, enabling deterministic, fault-tolerant data exchange between field controllers (FCU), I/O units, and operator stations (HIS). Their role is non-optional in any CENTUM architecture: without functional bus repeater modules, segment isolation and redundant ring topology cannot be maintained.

The Evolution of ANT Series Architecture

The ANT series traces its lineage to the CENTUM CS (Classic Series) platform introduced in the mid-1990s, where bus repeater hardware was required to extend the V-net coaxial backbone beyond single-segment limits. With the transition to CENTUM CS 3000 (released 1998), Yokogawa standardized the ANT module form factor into the RIO (Remote I/O) nest architecture, introducing models such as the ANT100 and ANT200 families for coaxial V-net extension. The CENTUM VP platform (released 2008) introduced V-net/IP — an Ethernet-based deterministic control bus — which required a new generation of ANT modules capable of handling TCP/IP encapsulation while maintaining sub-millisecond scan cycle compatibility. The ANT502 family, including the ANT502-10, represents this generation: designed for V-net/IP ring topology with dual-port Ethernet connectivity and hardware-level redundancy switching. As of 2026, the CENTUM CS 3000 platform has entered end-of-life support phase, while CENTUM VP remains in active production. Customers operating CS 3000 installations face increasing difficulty sourcing ANT series spares through standard distribution channels, making third-party lifecycle support providers essential for plant continuity.

ANT Series Full Catalog & Functionalities (SKU List)

The following SKUs represent verified, commonly deployed modules within the Yokogawa ANT series across CENTUM CS 3000 and CENTUM VP installations. Modules are classified by functional category.

Bus Repeater / V-net Extension Modules

• ANT502-10: V-net/IP bus repeater, single-port, for CENTUM VP ESB ring topology extension.
• ANT502-11: V-net/IP bus repeater with enhanced diagnostics, CENTUM VP R4.x and above.
• ANT100-10: Coaxial V-net bus repeater for CENTUM CS 3000, single segment extension.
• ANT100-11: Coaxial V-net bus repeater, CS 3000, with redundant power input support.
• ANT200-10: Dual-port coaxial V-net repeater for extended segment bridging, CS 3000.
• ANT200-11: Dual-port coaxial V-net repeater, CS 3000, with improved EMI shielding.

Field Network Interface / Communication Adapter Modules

• ANT300-10: FOUNDATION Fieldbus H1 interface module for CENTUM VP FCS integration.
• ANT300-11: FOUNDATION Fieldbus H1 interface, redundant link active scheduler support.
• ANT400-10: PROFIBUS DP master interface module, CENTUM VP, up to 12 Mbps.
• ANT400-11: PROFIBUS DP master interface with extended device database (GSD) support.
• ANT600-10: DeviceNet master interface module for CENTUM VP field device integration.
• ANT700-10: Modbus RTU/TCP gateway module for legacy device integration in CENTUM VP.

Power Supply Interface / Bus Power Modules

• ANT800-10: Redundant bus power supply interface module for CENTUM VP RIO nest.
• ANT800-11: Bus power interface with active current sharing for high-density I/O nests.
• ANT900-10: ESB coupler module for connecting remote I/O nests over fiber-optic ESB links.
• ANT900-11: ESB fiber coupler, extended distance variant, up to 2 km single-mode fiber.