Yokogawa SNB10D-223 Safety Node Unit

The Yokogawa SNB10D-223 Safety Node Unit is a critical module within the ProSafe-RS safety instrumented system (SIS). It serves as an interface between field devices and the safety control unit, transmitting analog and contact input signals while supporting redundant communication for high-reliability safety applications. Its modular design allows flexible integration with power supply, ESB bus interface, optical repeater, and I/O modules, making it suitable for various industrial processes.

Specifications

Applications

• Safety instrumented systems in process automation

• Monitoring and controlling critical plant operations

• Redundant safety signal management for chemical, oil & gas, and power plants

• Interface between field devices and ProSafe-RS control units

Advantages

• High Reliability: Dual-redundant architecture ensures continuous operation.

• Modular Design: Flexible configuration with multiple module support.

• Wide Environmental Tolerance: Operates in -20°C to 70°C and 5–95% humidity.

• Compatibility: Supports multiple communication protocols for seamless integration.

• Compact Form Factor: Standard 19-inch rack mounting for easy installation.

FAQ

1. What is the primary function of the SNB10D-223?

It transmits field input signals to the safety control system and supports redundant communication for safety-critical processes.

2. What kind of redundancy does it provide?

It features a dual-redundant architecture to maintain system reliability even in the event of a module failure.

3. Can it operate in harsh environments?

Yes, it operates between -20°C and 70°C and tolerates 5–95% relative humidity.

4. Which modules can be installed on this unit?

Power supply modules, ESB bus interface modules, optical ESB repeater modules, and I/O modules.

5. What is the communication protocol used?

It primarily uses the Enhanced Safety Bus (ESB) and supports multiple industrial protocols.

6. What are the physical dimensions and weight?

Dimensions: 482.6 × 221.5 × 205 mm; Weight: 5.9 kg.

7. Is it rack-mountable?

Yes, it is designed for 19-inch standard rack mounting.

8. Can it integrate with other Yokogawa SIS modules?

Yes, it is fully compatible with other ProSafe-RS modules.

9. Does it require a dedicated power supply?

Yes, it includes dedicated power supply modules for proper operation.

10. Which industries commonly use this unit?

Chemical, petrochemical, oil & gas, and power generation industries requiring safety instrumented systems.