Description
The Yokogawa EC402-10 STYLE S1 is an ESB Bus Coupler Module used to connect a Field Control Unit (FCU) with ESB bus node units in Yokogawa CENTUM VP control systems. The EC402 provides two ESB bus connector ports and functions as an ESB bus master interface, supporting communication between the FCU and connected node units. Yokogawa specifications list a transmission speed of 128 Mbps, a maximum of 9 connectable units on each side under the standard configuration, and a maximum transmission distance of 10 m per side. The supplied listing identifies this item as a new open-box unit and specifies Japan as the country of origin.
EC402-10 STYLE S1
Product Datasheet
| Parameter | Value |
|---|---|
| Brand | Yokogawa |
| Model | EC402-10 STYLE S1 |
| Series | EC402 Series |
| Product Name | ESB Bus Coupler Module |
| Function | ESB Bus Master Interface |
| ESB Ports | 2 |
| Transmission Speed | 128 Mbps |
| Country of Origin | Japan |
| Condition / Status | New – Open Box |
| Weight | Approx. 0.24 kg |
| Power Consumption | Approx. 0.5 A |
⚙️ Product Features
🔹 ESB Bus Coupling – Connects the Field Control Unit with ESB bus node units through the ESB communication bus.
🔹 Two-Port Architecture – EC402 provides two ESB bus connector ports, allowing a larger number of connected nodes and a longer overall transmission path than the single-port arrangement.
🔹 128 Mbps Communication – Supports 128 Mbps I/O module data transmission for compatible Yokogawa control-system configurations.
🔹 Dual-Redundant Applications – Yokogawa documentation specifies EC401/EC402 bus coupler modules for dual-redundant configurations.
🔹 CENTUM VP Integration – Designed for compatible Field Control Units and ESB bus architectures used in Yokogawa process-control systems.
❓ Common Questions & Answers
Q1: What is the Yokogawa EC402-10 STYLE S1?
A: It is an ESB Bus Coupler Module used to connect a Field Control Unit with ESB bus node units.
Q2: What is the main function of the EC402?
A: It provides the ESB bus master interface between the Field Control Unit and connected ESB bus nodes.
Q3: How many ESB ports does EC402 have?
A: The EC402 has two ESB bus connector ports on the front of the module.
Q4: What is the communication speed?
A: The specified I/O module data transmission speed is 128 Mbps.
Q5: How many nodes can be connected?
A: Under the standard configuration, Yokogawa specifies a maximum of 9 units on the upper side and 9 units on the lower side.
Q6: What is the maximum transmission distance?
A: The specification lists up to 10 m on each side, with a total maximum transmission distance of 20 m under the standard arrangement.
Q7: Can EC402 be used in a redundant system?
A: Yes. Yokogawa documentation specifies EC401/EC402 ESB Bus Coupler Modules for dual-redundant configurations.
Q8: What should be checked before replacement?
A: Confirm the complete model number, STYLE/S1 designation, FCU compatibility, ESB bus configuration, slot arrangement, and redundancy requirements before installation.
⭐ Recommended Yokogawa Models
- EC401 – ESB Bus Coupler Module
- EC402 – ESB Bus Coupler Module with two ESB ports
- A2EN402 – N-ESB Bus Coupler Module
- A2EN404 – N-ESB Bus Coupler Module
- ANT401 – Optical ESB Bus Repeater Module
- ANT411 – Optical ESB Bus Repeater Module
- ANB10D – ESB Bus Node Unit
- ANB11D – Optical ESB Bus Node Unit
- CP461 – Processor Module
- CP471 – Processor Module
