The S2EN402-S0001 is a 2-port N-ESB bus coupler module designed for use in ProSafe-RS safety instrumented systems. It provides a high-speed communication interface between the Safety Control Unit (SCU) and an N-IO node, which consists of a node interface unit and N-IO I/O units. This module ensures reliable data exchange over the N-ESB bus and supports dual-redundant configurations for enhanced system availability.

Technical Specifications

• N-ESB Bus Interface
  • Model Variants:
    • S2EN402: 2 communication ports
    • S2EN404: 4 communication ports
  • Connector Type: RJ-45 (ISO/IEC 8877-compliant)
  • Transmission Medium: Unshielded twisted pair (UTP), Cat 5 or higher
  • Transmission Speed: 100 Mbps
  • Maximum Cable Distance: 100 m between nodes (cabinet-contained routing only)
  • Connection Configuration:
    • Modules must be installed in odd-numbered and adjacent even-numbered slots of the S2SC70 base unit
    • Connected to N-ESB bus 1 and bus 2 respectively
    • Always used in dual-redundant configuration
• Electrical and Mechanical
  • Current Consumption: 0.5 A
  • Weight: 0.22 kg
  • Mounting Restrictions:
    • Slots 7 and 8 of S2SC70 are unavailable if ESB bus coupler modules (SEC401/SEC402) are installed
    • Only slots 1–6 are usable for S2EN402/S2EN404 in redundant pairs