Overview

The Yokogawa S2EN402-S0001 Bus Coupler Module is designed to enable fast, reliable, and redundant communication within safety instrumented systems (SIS). It connects the Safety Control Unit (SCU) to N-IO nodes via the N-ESB bus, using two RJ-45 ports to provide dual-redundant data paths. This redundancy enhances system availability and fault tolerance, which is critical in oil & gas, chemical processing, and power generation environments.

The module supports 100 Mbps transmission over UTP cables (Enhanced Category 5 or better), with a maximum distance of 100 meters per link. Its compact form factor and ISO/IEC8877-compliant connectors make integration into ProSafe-RS architectures straightforward, supporting scalable, high-availability safety networks.

Technical Data

Typical Applications

• Safety Instrumented Systems (SIS): Ensures redundant communication between SCUs and N-IO nodes for emergency shutdown, fire, and gas detection systems.

• Oil & Gas Facilities: Provides high-availability communication in hazardous areas.

• Chemical Processing Plants: Supports distributed safety logic and I/O coordination.

• Power Generation: Enables fast, secure data exchange in turbine and boiler protection networks.

• OEM Safety Panels: Integrated into custom safety architectures for regulated industrial applications.

Example: In a refinery SIS, the S2EN402-S0001 maintains uninterrupted communication between controllers and field I/O even if one network path fails, ensuring operational safety and system integrity.

FAQ

Q: What is the function of the S2EN402-S0001 module?
A: It serves as a bus coupler, enabling high-speed communication between SCUs and N-IO nodes.

Q: How many communication ports does it have?
A: Two RJ-45 ports, providing dual-redundant N-ESB connections.

Q: What cable type is required?
A: Enhanced Category 5 or better UTP cables.

Q: Is it compatible with Yokogawa’s ProSafe-RS system?
A: Yes, it is specifically designed for ProSafe-RS integration.

Q: What is the maximum cable length supported?
A: Up to 100 meters per connection.