Yokogawa A2EE1A-T ESB Bus Adapter

Frequently asked questions
Q:What is the Yokogawa A2EE1A-T used for?
A:The Yokogawa A2EE1A-T is used to provide ESB Bus termination in CENTUM VP FIO systems. It is installed together with the SB401 ESB Bus Interface Slave Module at the end of an ESB Bus segment.

Q:What is the function of the built-in terminator?
A:The integrated terminator provides the required termination at the end of an ESB Bus segment, ensuring the bus is configured according to Yokogawa's system architecture.

Q:Which control system uses the A2EE1A-T?
A:The A2EE1A-T is used in Yokogawa CENTUM VP systems that employ the FIO (Field Input/Output) architecture and ESB Bus communication.

Description

The Yokogawa A2EE1A-T is a connector unit with an integrated terminator designed for the ESB Bus used in Yokogawa CENTUM VP Field Control Unit (FCU) systems. It is intended for installation with the SB401 ESB Bus Interface Slave Module, where it provides the required bus termination at the end of an ESB Bus segment. The A2EE1A-T forms part of the FIO (Field Input/Output) network architecture and is used to establish the proper termination of the ESB Bus in accordance with the system configuration defined by Yokogawa. It is applied in CENTUM VP control systems using SB401 interface modules and is identified in the official system configuration documentation as the connector unit with terminator for ESB Bus. The module supports reliable integration within the ESB Bus network and is installed as part of the standard hardware configuration for compatible FIO systems.

Parameter

Model: A2EE1A-T ESB Bus Adapter 
Transmission Speed: 128 Mbps (Megabits per second)
Connection Topology: Chain (Serial) configuration
Maximum Node Hops: Typically up to 8 hops per FIO Field Control Unit
Operating Temperature: -20 °C to +70 °C (-4 °F to +158 °F)
Storage Temperature: -40 °C to +85 °C (-40 °F to +185 °F)
Relative Humidity: 5% to 95%, non-condensing
Corrosive Gas Class: G3 Conformal Coating Option available for harsh industrial sites

Application areas

The Yokogawa A2EE1A-T connector unit with an integrated terminator is a specialized hardware component used exclusively within Yokogawa CENTUM VP distributed control systems (DCS). Its primary application areas include:

• Oil & Gas Refining and Petrochemicals: Ensuring continuous data flow from temperature, pressure, and flow transmitters in large-scale distillation, cracking, and blending units where a bus failure could trigger a total plant trip.
• Power Generation Facilities: Maintaining deterministic control communication for boiler, turbine, and auxiliary water systems in thermal, gas, or nuclear power plants.
• Chemical & Pharmaceutical Plants: Protecting batch processing logic and critical recipe controls from communication dropouts in heavily automated reactor blocks.
• LNG (Liquefied Natural Gas) Terminals: Supporting steady telemetry data handling across sprawling storage tanks and cryogenic vaporization fields.
  

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