Product Description

The A2EE1A-T is a critical hardware component within the Yokogawa CENTUM VP integrated production control system. It functions as an ESB (Extended Serial Backplane) Bus Adapter with integrated termination, specifically designed to preserve signal integrity at the physical end of an ESB network.

By eliminating electrical reflections on the bus, the A2EE1A-T (Part Number: A2EE1A-T) ensures stable, high-speed data communication between the Field Control Unit (FCU) and connected FIO or optical node units, directly supporting reliable I/O data exchange.

Technical Specifications

System Integration and Role

In multi-node ESB topologies, the A2EE1A-T is installed at the final node of an ESB bus segment. Its presence is mandatory to:

• Maintain correct ESB signal impedance

• Prevent reflections and electrical noise

• Pass CENTUM VP hardware consistency checks

• Avoid intermittent communication (“soft”) errors

Unlike standard ESB adapters, the A2EE1A-T integrates termination internally, eliminating the need for external terminators and reducing cabinet wiring complexity and failure points.

Frequently Asked Questions

Where should the A2EE1A-T be installed?
It must be installed in the last slot of the last FIO or ESB node unit on the ESB bus. For branched or optical ESB topologies, Yokogawa-specified termination rules must be followed to ensure proper bus balance.

Can a non-terminated adapter be used at the end of the ESB bus?
No. Using a standard adapter without the “-T” suffix at the end of the ESB chain will cause signal reflections, often resulting in communication timeouts or “Link Down” alarms in CENTUM VP diagnostics.