ProductPRODUCT
Featured products
Contact Us
- Yokogawa
- SNB10D-225
- Safety Node Unit
- Japan
- 482.6 x 221.5 x 205 mm
- 5.9 kg
- Xiamen, China
- New & In Stock
- T/T, PayPal, Western Union
- 1 Year
- 1-3 Working Days
- DHL, UPS, TNT, FedEx and EMS.
- 24-Hour Service
- COO
- 6
Our advantage
Global Logistics
We have a 10-year logistics and express cooperation agreement, so our products can be shipped to any place in the world.
Brand new and original
Our products are imported in bulk from the place of origin. Because of the cooperative relationship, our products are all original and 100% new.
24-hour service
We provide 7*24 hours service to our customers. We will be there whenever you need us.
Price advantage
All our products are priced very favorably because we have our own warehouse and supply.
| Company Information | |||
| [email protected] | |||
| Mobile | +8615980777398 | ||
| +8615980777398 | |||
| 15980777398 |
Product Overview
The Yokogawa SNB10D-225 Safety Node Unit is a core component of the Yokogawa ProSafe-RS Safety Instrumented System (SIS). It functions as a distributed safety I/O node, providing field signal acquisition, ESB bus communication, and power distribution to connected modules.
This unit is designed for mission-critical safety environments, ensuring high reliability, fault tolerance, and continuous operation in industrial automation systems such as oil & gas, petrochemical, and power generation plants.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Yokogawa |
| Model | SNB10D-225 |
| Product Type | Safety Node Unit |
| System Compatibility | ProSafe-RS / SIS |
| Function | Safety I/O node + ESB communication + power distribution |
| Communication Protocol | ESB Bus |
| Installation | 19-inch rack mounted |
| Dimensions | 482.6 × 221.5 × 205 mm |
| Weight | 5.9 kg |
| Power Supply | 100–120 V AC / 220–240 V AC / 24 V DC (variant dependent) |
| Redundancy | Dual-redundant power and communication support |
| Operating Temperature | -20°C to +70°C |
| Humidity | 10%–90% RH (non-condensing) |
| Country of Manufacture | Japan |
Function and Working Principle
The SNB10D-225 operates as a distributed safety node, responsible for managing field signals and communicating with the central safety controller.
Its core functions include:
- Collecting analog and digital field signals
- Providing power distribution to I/O modules
- Transmitting safety data via ESB bus
- Supporting redundant system architecture
- Ensuring deterministic, SIL-oriented communication
System Signal Flow
Field Devices → SNB10D-225 Node → ESB Bus → Safety Control Unit (SCU)
This architecture ensures continuous safe operation even under fault conditions, which is essential in safety-critical industries.
Role in Industrial Control Systems
Within Yokogawa ProSafe-RS systems, the SNB10D-225 acts as a localized safety I/O hub, connecting:
- Safety transmitters (pressure, temperature, flow, level)
- Emergency shutdown switches and field contacts
- Safety digital and analog I/O modules
- Safety Control Stations (SCS)
- ESB / optical ESB network infrastructure
It enables distributed installation of I/O modules close to field equipment, reducing wiring complexity while maintaining centralized safety control.
Industrial Applications
The SNB10D-225 is widely used in:
- Safety Instrumented Systems (SIS)
- Emergency Shutdown Systems (ESD)
- Fire & Gas detection systems
- Oil and gas production facilities
- Petrochemical and refining plants
- Offshore platforms
- Power generation stations
- Chemical processing industries
It is especially important where high reliability and functional safety compliance (SIL systems) are required.
Installation and System Integration
Proper installation ensures stable performance:
- Install in standard 19-inch industrial racks
- Ensure correct ESB bus routing and termination
- Maintain proper grounding and shielding
- Configure redundancy according to system architecture
- Avoid mechanical stress on connectors
- Perform full system commissioning checks
Correct installation improves system stability and long-term maintainability.
Compatible System Components
The SNB10D-225 works with:
- Yokogawa ProSafe-RS safety controllers
- ESB / optical ESB bus coupler modules (SEC401 / SEC402 series)
- Safety analog and digital I/O modules
- Terminal boards (SEA / SED / SBD series)
- Power supply modules
- Field instrumentation devices
- Engineering and diagnostics stations
These components together form a complete SIL-rated distributed safety architecture.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| SNB10D-225 | Safety Node Unit | Base SIS node platform | General safety systems |
| SNB10D-223 | Safety Node Unit | Lower variant in same family | Standard SIS applications |
| SNB10D-215 | Safety Node Unit | Revised configuration level | System-specific deployment |
| SNB10D-213 | Safety Node Unit | Earlier platform variant | Safety systems |
| SNB10D-4 | Safety Node Unit | Newer generation architecture | Modern SIS systems |
Key Advantages
- SIL3-oriented safety system design
- High-reliability ESB communication architecture
- Supports redundant power and communication paths
- Modular and scalable I/O expansion
- Integrated power distribution for field modules
- Strong diagnostics and fault detection
- Designed for continuous 24/7 operation
- Reduces field wiring complexity
- Proven performance in harsh industrial environments
Technical FAQs
What is SNB10D-225 used for?
It is a safety node unit used in Yokogawa ProSafe-RS systems to connect field devices and manage ESB-based communication.
Is it a controller or CPU?
No. It is a distributed I/O node, not a processing or logic controller.
What is the role of ESB bus?
The ESB bus provides deterministic and reliable communication between safety nodes and the central safety controller.
What industries use this module?
Oil & gas, petrochemical, chemical processing, offshore platforms, and power generation industries.
Conclusion
The Yokogawa SNB10D-225 Safety Node Unit is a critical component in industrial safety automation systems. It ensures reliable field signal acquisition, ESB communication, and distributed I/O management within ProSafe-RS architectures. With its redundant design and SIL-oriented engineering, it delivers stable and safe operation in demanding industrial environments where system integrity is essential.