Yokogawa SB401 BUS Interface Module Style S1 SB401-11

Description:

The Yokogawa SB401-11 (Style S1) Bus Interface Module is used an ESB (Enhanced System Bus) interface slave module used in Yokogawa CENTUM VP and related DCS architectures. It provides the communication link between field control units (FCU), node units, and I/O modules, enabling reliable data transmission across the system bus. 

Applications:

The Yokogawa SB401-11 is used in industrial environments to enable communication between control systems and distributed I/O. It is commonly deployed in chemical processing, oil & gas, power generation, and manufacturing plants. The module ensures stable and synchronized data exchange between controllers and field devices, supporting continuous and safe plant operation.

Technical Specifications:

• Manufacturer: Yokogawa
• Model / Part Number: SB401-11 (Style S1)
• Product Type: ESB Bus Interface Slave Module
• Function: Connects FCU / node units to ESB communication bus
• System Compatibility:
• CENTUM VP / CENTUM CS
• FIO / ESB node units
• Configuration: Dual-redundant operation (typically installed in pairs)
• Data Transmission: High-speed bus communication (~128 Mbps typical)
• Max Connected Units: Up to ~9 nodes (system dependent)
• Current Consumption: ~0.5 A
• Dimensions: ~224 × 24 × 150 mm
• Weight: ~1–2 kg
• Installation: Rack-mounted within node/interface unit
• Function Role: Communication bridge between I/O modules and control system

Common Replacements:

• Yokogawa SB401-10 (single-port variant)
• Yokogawa SSB401-53 (newer ESB interface module)
• Yokogawa SEC401-11 Coupler Module