The Yokogawa EB402-10 is a high-reliability ESB Bus Coupler Module used in CENTUM VP and CENTUM CS 3000 distributed control systems (DCS). It serves as a communication interface between the Field Control Unit (FCU) and remote I/O nodes, supporting high-speed, optical-based transmission for robust field data communication in both safe and hazardous industrial environments.

Technical Specifications

Applications

• Petrochemical Plants: Interface for remote I/O control in classified hazardous areas.

• Power Generation Facilities: Communication backbone for control loops between main and auxiliary systems.

• Pharmaceutical Industry: Ensures safe, reliable I/O signal transmission in cleanroom environments.

• Water and Wastewater Treatment: Robust module performance in high-humidity, corrosive areas.

• Oil and Gas: Vital component for offshore/onshore process automation systems.

Advantages

• High-Speed Fiber Optic Communication: Offers reliable, interference-resistant data transmission.

• Compact Design: Fits seamlessly into system architecture, optimizing space utilization.

• Robust Environmental Resistance: Operates under wide temperature and humidity ranges.

• System Compatibility: Fully integrates with CENTUM VP/CS 3000 DCS.

• Long-Term Stability: Designed for 24/7 industrial operation with low failure rates.

• Explosion Protection Ready: When used as part of a certified system, supports installation in Zone 2/Div. 2 areas.

FAQ Section

Q1: What is the primary function of the EB402-10 module?

A1: It serves as a fiber-optic bus coupler that links field I/O nodes to the central control unit in Yokogawa’s DCS platforms.

Q2: Is EB402-10 compatible with CENTUM CS 3000 systems?

A2: Yes, it is fully compatible with both CENTUM CS 3000 and CENTUM VP systems.

Q3: Can the EB402-10 be used in hazardous environments?

A3: Yes, when integrated into a certified system with explosion protection compliance (IECEx, ATEX, FM, CSA).

Q4: What kind of communication does the EB402-10 support?

A4: It supports full-duplex optical communication, ensuring high-speed and noise-immune data transfer.

Q5: What is the operating voltage of the EB402-10?

A5: The module is powered through its baseplate from the control system; no external power supply is needed.

Q6: How is the module mounted in the system?

A6: It is mounted on a designated baseplate inside the system cabinet.

Q7: Does it require a specific type of fiber optic cable?

A7: Yes, it requires standard duplex fiber-optic cables specified by Yokogawa for ESB bus modules.

Q8: Is EB402-10 hot-swappable?

A8: No, the module should not be inserted or removed while the system is live in hazardous areas.

Q9: What environmental conditions can the module withstand?

A9: It operates between 0°C to 50°C and 5% to 95% RH (non-condensing).

Q10: How much does the EB402-10 weigh?

A10: It weighs approximately 0.3 kg.