Core Information of RB401
Based on the provided Yokogawa CENTUM RIO System documentation, RB401 is identified as a Bus
Interface Module designed for the CENTUM RIO (Remote I/O) system. It serves as a critical
component for enabling communication between Node Interface Units and the control system’s bus
architecture, supporting reliable data transmission in industrial automation environments.
●Model Number: RB401
●Product Type: Bus Interface Module (RIO System-specific)
●Core Function: Facilitates communication between Node Interface Units (e.g.,
ANS10/AND10/ANS20/AND20) and the RIO bus, ensuring stable data exchange between distributed
I/O modules and the Field Control Unit (FCU).
●Key Features: Supports dual-redundant bus configuration (compatible with AND-series Node Units),
optimized for industrial harsh environments, and integrates seamlessly with Yokogawa’s RIO system
ecosystem.
●Application Scope: Industrial control systems utilizing Yokogawa CENTUM CS, CENTUM CS
1000/3000, or legacy CENTUM VP RIO platforms, suitable for process control, discrete signal
handling, and distributed I/O networking.
Environmental & Operational Traits
●Operating Environment: Complies with RIO system environmental standards (0–50 °C operating
temperature, 5–95% RH non-condensing, vibration resistance up to 2.0 m/s²).
●Redundancy Support: Enables dual-redundant RIO bus configuration when paired with AND-series
Node Units, enhancing system reliability and fault tolerance.
●Power Supply: Derives power from the Node Unit’s integrated power supply module (compatible
with 100–120 V AC, 220–240 V AC, or 24 V DC input).
