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Product Overview
The Yokogawa SNB10D-425/CU2T Safety Node Unit is a rack-mountable module designed for integration into ProSafe-RS Safety Instrumented Systems. It facilitates reliable transmission of analog and discrete input signals from field devices to the safety control unit while providing stable power to connected I/O modules. Its robust design ensures compliance with industrial safety standards in critical applications.
Technical Specifications
| Parameter | Specification |
|---|---|
| Model | SNB10D-425/CU2T |
| Power Supply | 100–120 V AC / 220–240 V AC / 24 V DC |
| Power Consumption | 100–120 V AC: 200 VA 220–240 V AC: 230 VA 24 V DC: 5.5 A |
| Dimensions | 482.6 × 221.5 × 205 mm |
| Weight | 5.9 kg |
| Mounting | Rack-mounted (4 × M5 screws, insulation bushes included) |
| Operating Temperature | -10°C to +55°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5% to 95% RH (non-condensing) |
| Connectable Units | Up to 13 (with SEC402 ESB bus coupler) Up to 9 (with SEC401 ESB bus coupler) |
| Conformity | ProSafe-RS safety standards |
Applications
The SNB10D-425/CU2T is ideal for safety-critical industrial environments including:
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Process automation plants
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Power generation facilities
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Chemical and petrochemical plants
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Oil & gas installations
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Manufacturing systems requiring SIL-compliant safety operations
It ensures secure and reliable communication between field devices and the central safety control system.
Advantages
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Redundant power supply support for high reliability
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Rack-mountable design for space efficiency
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Dual ESB bus interface modules for improved signal integrity
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Supports multiple safety node units for scalable safety architectures
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Wide operating and storage temperature range
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Compliant with stringent industrial safety standards
FAQ
1. What is the purpose of the SNB10D-425/CU2T?
It provides reliable signal transmission and power supply for safety I/O modules in ProSafe-RS systems.
2. Can multiple units be connected together?
Yes, up to 13 units can connect using the SEC402 ESB bus coupler and 9 units using SEC401.
3. What are the supported power supply types?
100–120 V AC, 220–240 V AC, and 24 V DC.
4. What is the operating temperature range?
-10°C to +55°C.
5. What is the unit’s weight and dimensions?
Dimensions: 482.6 × 221.5 × 205 mm; Weight: 5.9 kg.
6. Can this unit be mounted in a standard rack?
Yes, it is rack-mountable using four M5 screws with insulation bushes.
7. Does the SNB10D-425/CU2T comply with safety standards?
Yes, it meets ProSafe-RS safety standards.
8. What kind of I/O modules can it support?
It supports analog and discrete input I/O modules compatible with ProSafe-RS.
9. Is the unit suitable for hazardous environments?
Certain suffix options provide compliance with explosion-protection standards; check the model code for specifics.
10. How is the ESB bus interface configured?
It uses dual SSB401 interface modules to maintain secure communication between nodes.
Related and Similar Models
| Model | Key Parameter | Dimensions | Weight |
|---|---|---|---|
| SNB10D-223/CU2N | Rack-mountable Safety Node | 482.6 × 221.5 × 205 mm | 5.9 kg |
| SNB10D-425/CU3T | Enhanced ESB Node | 482.6 × 221.5 × 205 mm | 6.1 kg |
| SNB10D-425 | Standard Safety Node | 482.6 × 221.5 × 205 mm | 5.8 kg |
| SNB10D-426 | Dual-redundant Node | 482.6 × 221.5 × 205 mm | 6.0 kg |
| SNB10D-227 | Compact Safety Node | 482.6 × 221.5 × 205 mm | 5.7 kg |
| SNB10D-428/CU2T | Advanced Safety Node | 482.6 × 221.5 × 205 mm | 6.2 kg |
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