Product Overview

The YOKOGAWA SNB10D-425/CU2T functions as a complete, high-integrity Duplexed Safety Node Unit, providing a fully functional, fault-tolerant control station for Safety Instrumented Systems (SIS). This essential YOKOGAWA unit integrates redundant safety processors, specific I/O module capacity, and a redundant communication interface, making it a self-contained, safety-certified automation solution.

The "D" in the model number (SNB10D) signifies its Duplexed (Redundant) architecture, ensuring non-stop control.

The "S" in the broader series name indicates its Safety designation, typically certified up to TÜV SIL3.

The "425" portion denotes the integrated I/O capacity (which can vary, but generally indicates a mix of 4 Analog Inputs, 2 Digital Inputs, and 5 Digital Outputs, or similar high-density, safety-rated I/O).

Detailed Technical Specifications of the SNB10D−425/CU2T

The YOKOGAWA SNB10D-425/CU2T unit features a complete architecture built for safety and reliability.

Safety Redundancy and Integrated Design

The core of the SNB10D−425/CU2T is its duplexed safety processor, which executes the safety logic and continuously performs self-diagnostics to ensure high confidence in failure detection. The entire unit is designed and certified to the highest safety standards, making it suitable for Emergency Shutdown Systems (ESD) and High-Integrity Pressure Protection Systems (HIPPS). The integrated I/O is also safety-rated, providing a secure interface to safety-critical field sensors and final elements.

Frequently Asked Questions (FAQ)

Q1: What does the "Duplexed" feature mean for this Safety Node Unit?

A1: "Duplexed" means the unit contains two fully redundant, synchronized safety processors that provide immediate failover capability, ensuring the safety logic continues to execute without interruption (non-stop control) if one processor fails.

Q2: What safety standard does the SNB10D−425/CU2T typically meet?

A2: This unit is certified by organizations like TÜV for compliance with SIL3 (Safety Integrity Level 3), the highest integrity level commonly used in process industries.

Q3: How many input/output points are on the SNB10D−425/CU2T unit?

A3: The "425" in the model number suggests an integrated or predefined mix of I/O points (e.g., 4 Analog, 2 Digital, 5 Digital), providing a specific configuration of safety-rated I/O.

Q4: What is your policy if the unit has a quality issue upon arrival?

A4: We support a 30-day return window if there are any quality issues with the YOKOGAWA SNB10D-425/CU2T unit.