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- Warehouse: Spot
- Warranty： 365 days
- Quality: Original module
- Condition： New
- Shipping method: Courier delivery
- Contact person: LI MING
- Contact number: +86 18059884790
- WeChat：18059884790
- E-mail: plc66@qq.com
Yokogawa EC4020 ESB Bus Coupler Module
Product Brief Description
Yokogawa EC4020 (EC402 series) is a 2-port ESB bus coupler master module for CENTUM VP DCS AFV30 and AFV40 field control units. It serves as the ESB bus master interface inside FCU, connecting the field control unit to ANB series ESB node units and FIO I/O racks, running at 128 Mbps high-speed bus transmission for process control data.
Product Functions
- Act as ESB bus master to establish communication between FCU and remote/local ANB nodes
- Two independent ESB ports to expand bus topology and connect multiple node units
- Support dual redundant configuration by installing two EC4020 modules in one FCU
- Transmit real-time I/O values, setpoints, alarm and diagnostic information at 128Mbps
- Max up to 13 connected ESB node units for large-scale FIO I/O expansion
- Front LED indicators for bus active, communication error and module status diagnosis
- Support hot swap and redundant bus switchover without interrupting control operation
Application Scenarios
- Yokogawa CENTUM VP DCS petrochemical, refinery and natural gas control systems
- Thermal power, combined cycle power plant boiler and turbine control cabinets
- Chemical, pharmaceutical and water treatment continuous process control
- Large FIO I/O distributed layout with multi-node ESB bus architecture
- DCS cabinet retrofit, spare replacement and system expansion projects
FAQ
Q: What is the difference between EC4020 and EC401?
A: EC4020 (EC402) is 2-port version, supports more connected nodes and longer bus distance; EC401 is older single-port coupler module.
Q: Which FCU models are compatible with EC4020?
A: It is designed for AFV30S, AFV30D, AFV40S, AFV40D FIO field control units of CENTUM VP DCS.
Q: What is the maximum transmission speed?
A: The ESB bus communication speed is 128 Mbps for I/O data transmission.
Q: Can it be used for Vnet/IP network?
A: No, EC4020 is dedicated ESB bus coupler, not compatible with Vnet/IP communication network.
Q: Is this module available for spare replacement?
A: It is a mature DCS communication module. New surplus and refurbished units are supplied for existing CENTUM VP system maintenance.
