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Product Overview
The Yokogawa SNB10D-225 Safety Node Unit is an essential component of the ProSafe-RS safety instrumented system. It is designed to reliably manage field device signals and communicate with the Safety Control Unit (SCU), ensuring continuous safe operation of industrial processes. The unit’s dual-redundant power supply, modular rack-mountable design, and compliance with strict safety standards make it suitable for high-availability applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SNB10D-225 |
| Mounting | 19-inch Rack-Mountable |
| Power Supply | Dual-redundant, 220–240 V AC |
| Communication | ESB Bus (Ethernet Safety Bus) |
| Input/Output | Analog and Contact Signals |
| Environmental Compliance | ISA Standard G3 |
| Operating Temperature | -20°C to 70°C |
| Explosion Protection | None |
| Dimensions | 482.6 x 221.5 x 205 mm |
| Weight | 5.9 kg |
Applications
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Safety monitoring of chemical, oil, and gas plants
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Power generation and distribution systems
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Critical process automation in refining and petrochemical industries
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Integration with ProSafe-RS SCU for real-time safety management
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Redundant safety-critical signal processing
Advantages
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High Reliability: Dual-redundant power supply ensures uninterrupted operation.
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Modular Design: Rack-mountable and modular for flexible system expansion.
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Advanced Communication: ESB Bus allows secure, fast data transmission to SCU.
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Wide Operating Range: Functions reliably across a broad temperature range.
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Scalable Integration: Supports multiple I/O modules for complex safety configurations.
FAQ
1. What is the primary function of the SNB10D-225?
It transmits signals from field devices to the SCU to ensure process safety.
2. Can it operate independently without other safety modules?
No, it requires integration with a ProSafe-RS SCU for full functionality.
3. What type of communication does it use?
It uses the Ethernet Safety Bus (ESB) to connect to the SCU.
4. What are the supported input signals?
Both analog and discrete contact signals from field devices are supported.
5. What is the operating temperature range?
The unit operates safely from -20°C to 70°C.
6. Is explosion protection required?
No intrinsic explosion protection is included; it is designed for safe-area environments.
7. How is power redundancy achieved?
Through a dual-redundant AC power supply ensuring continuous operation.
8. Can it support multiple I/O modules?
Yes, it provides power and connectivity to several I/O modules for modular expansion.
9. What are the installation requirements?
It is designed for 19-inch rack mounting with standard rack spacing.
10. How heavy is the unit and what are its dimensions?
Dimensions: 482.6 x 221.5 x 205 mm; Weight: 5.9 kg.
Related and Similar Models
| Model | Description | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| SNB10D-200 | Safety Node Unit, single-redundant | 482.6 x 221.5 x 205 | 5.5 |
| SNB10D-210 | Enhanced safety node with extra I/O | 482.6 x 221.5 x 205 | 5.7 |
| SNB10D-220 | Dual-redundant node, extended temp | 482.6 x 221.5 x 205 | 5.8 |
| SNB10D-230 | Rack-mountable, high-availability | 482.6 x 221.5 x 205 | 6.0 |
| SNB10D-240 | Node unit with integrated diagnostics | 482.6 x 221.5 x 205 | 6.2 |
| SNB10D-250 | Advanced modular safety node | 482.6 x 221.5 x 205 | 6.3 |
Popular Yokogawa Models
| Model | Description | Dimensions (mm) | Weight (kg) |
|---|---|---|---|
| CENTUM VP CS300 | Process Control Station | 450 x 200 x 200 | 7.0 |
| ProSafe-RS SCU | Safety Control Unit | 482 x 220 x 210 | 6.5 |
| DCS FCS Controller | Field Control Station | 480 x 210 x 200 | 6.2 |
| SNB20D-225 | Next-generation Safety Node | 482.6 x 221.5 x 205 | 6.0 |
| STARDOM FCN | Modular Safety Controller | 430 x 210 x 190 | 5.8 |
| YS100 Safety Relay | Safety signal relay module | 120 x 60 x 35 | 0.4 |
