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- Yokogawa
- SNB10D-213/CN2N
- Safety Node Unit
- Japan
- 482.6 x 221.5 x 205 mm
- 5.9 kg
- Xiamen, China
- New & In Stock
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Product Overview
The Yokogawa SNB10D-213/CN2N Safety Node Unit is a high-reliability field node used in Yokogawa ProSafe-RS Safety Instrumented Systems (SIS). It serves as a distributed safety I/O and communication hub, connecting field instruments to the safety control system via the ESB bus architecture.
This model is specifically designed for mission-critical industrial environments, ensuring safe signal acquisition, redundant communication, and stable power distribution for connected I/O modules.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | Yokogawa |
| Model | SNB10D-213/CN2N |
| 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 x 221.5 x 205 mm |
| Weight | 5.9 kg |
| Power Supply Options | 100–120 V AC / 220–240 V AC / 24 V DC |
| Power Consumption | ~200–230 VA (AC variants) |
| Redundancy | Dual-redundant power and communication support |
| Operating Temperature | -20°C to +70°C |
| Humidity | 5%–95% RH (non-condensing) |
| Country of Manufacture | Japan |
Function and Working Principle
The SNB10D-213/CN2N operates as a distributed safety node, responsible for collecting field signals and transmitting them securely to the central safety controller.
Its main functions include:
- Acquisition of analog and digital field signals
- Power distribution to connected I/O modules
- ESB bus communication with Safety Control Unit (SCU)
- Supporting redundant safety data transmission paths
- Ensuring fail-safe operation in critical processes
System Data Flow
Field Devices → SNB10D Node → ESB Bus → Safety Control Unit (SCU)
This architecture ensures deterministic, fault-tolerant communication required for SIL-rated safety systems.
Role in Industrial Control Systems
Within Yokogawa ProSafe-RS architectures, the SNB10D-213/CN2N 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 significantly reduces field wiring complexity while improving system modularity and maintainability.
Industrial Applications
The SNB10D-213/CN2N is widely used in:
- Safety Instrumented Systems (SIS)
- Emergency Shutdown Systems (ESD)
- Oil and gas upstream/downstream facilities
- Petrochemical and refining plants
- Offshore platforms
- Power generation stations
- Chemical processing plants
- Large-scale industrial automation systems
It is particularly critical in environments where process failure can lead to safety hazards or operational shutdowns.
Installation and System Integration
Proper installation is essential for safe operation:
- Install in standard 19-inch industrial racks
- Ensure correct ESB bus cabling and termination
- Maintain proper grounding and shielding
- Follow redundancy configuration requirements
- Avoid mechanical stress on connectors
- Verify system addressing during commissioning
Correct setup ensures stable communication and reduces system downtime risk.
Compatible System Components
The SNB10D-213/CN2N works with:
- Yokogawa ProSafe-RS safety controllers
- ESB / optical ESB bus coupler modules (SEC401 / SEC402 series)
- Safety analog and digital I/O modules
- Power supply units for node operation
- Terminal boards (SEA / SED / SBD series)
- Field instrumentation devices
- Engineering and diagnostics stations
These components together form a complete SIL-capable safety automation architecture.
Recommended Alternative Models
| Model | Type | Key Feature | Application |
|---|---|---|---|
| SNB10D-213/CN2N | Safety Node Unit | Standard redundant safety node | SIS / ESD systems |
| SNB10D | Safety Node Unit | Base platform | General safety applications |
| SNB10D-2 | Safety Node Unit | Dual-redundant configuration | High-availability systems |
| SNB10D-4 | Safety Node Unit | Updated revision | Modern SIS architectures |
| SCS Safety Controller | Control Unit | Central safety processing | System-level control |
Key Advantages
- SIL3-oriented safety system design
- High-reliability ESB communication architecture
- Supports redundant power and communication paths
- Integrated power distribution for I/O modules
- Scalable distributed safety architecture
- Strong fault detection and diagnostics capability
- Designed for continuous 24/7 operation
- Reduces field wiring and installation complexity
- Proven reliability in hazardous industrial environments
Technical FAQs
What is the main function of SNB10D-213/CN2N?
It is a safety node unit that connects field devices to Yokogawa ProSafe-RS systems and manages ESB-based communication and power distribution.
Is it a controller or CPU?
No. It is a distributed safety I/O node, not a processor module.
Where is it used?
It is used in Yokogawa Safety Instrumented Systems (SIS), including ESD and emergency shutdown applications.
What does the suffix “/CN2N” indicate?
It typically refers to connector and configuration options used for ESB bus integration and system compatibility.
Conclusion
The Yokogawa SNB10D-213/CN2N Safety Node Unit is a critical component in high-integrity safety systems. It provides reliable field signal acquisition, redundant ESB communication, and integrated power distribution for distributed I/O modules. With its robust industrial design and SIL-oriented architecture, it plays a key role in ensuring safe and continuous operation in complex industrial environments.