Product Parameters
- Model Number: SNB10D-243 S2
- Series: ProSafe-RS Safety Instrumented System
- Power Supply: 100-120 V AC / 220-240 V AC (Dual Redundant Support)
- Node Type: Safety Node Unit for FIO (Field I/O)
- Bus Interface: ESB Bus (Enhanced Service Bus)
- Configuration: 19-inch Rack-mount (Standard)
- I/O Slots: 8 Slots for I/O modules
- Safety Integrity Level: SIL3 Certified
Product Description
The Yokogawa SNB10D-243 S2 is a high-reliability safety node unit designed for the ProSafe-RS safety instrumented system. It acts as the physical and electrical housing for safety-related input/output modules, providing a secure backplane for communication and power distribution. The “S2” revision features optimized noise immunity and enhanced thermal management, ensuring stable operation in the demanding environments of industrial safety loops. This unit supports dual-redundant power supplies and ESB bus communication modules, allowing it to maintain critical safety functions even in the event of a partial hardware failure.
Application Areas
This safety node is a fundamental building block in Emergency Shutdown Systems (ESD), Fire and Gas Systems (F&G), and Burner Management Systems (BMS). It is utilized throughout the global energy sector, particularly in offshore platforms, chemical refineries, and nuclear power facilities where failsafe operation and SIL3 compliance are mandatory.
Product Specifications
- Weight: 5.80 kg
- Dimensions: 132.5 mm x 482.6 mm x 310 mm (3U Rack height)
- Country of Origin: Japan
- Mounting: 19-inch rack mounting or wall mounting (with kits)
Operational Precautions
- Ensure the ESB bus cables are properly terminated with the correct impedance to prevent signal reflections that can cause communication timeouts.
- When configuring for redundant operation, verify that both power supply units are connected to independent power sources for maximum availability.
- Use the provided grounding terminal to bond the unit to the facility’s safety earth ground to mitigate electromagnetic interference.
- Avoid installing non-safety-rated modules in the SNB10D slots if the node is being used in a SIL-certified safety loop.
Recommended Similar Product Models
| Model Number | Product Category | Feature Set |
| SNB10D-243 S1 | Safety Node Unit | Legacy Hardware Revision |
| SNT10D-243 S2 | Safety Node Unit | 24V DC Power Variant |
| SSC60D-F22 | Safety Control Unit | Integrated Controller Node |
| SEC401-S2 | Bus Interface Module | ESB Bus Connection |
| PW482-10 | Power Supply Module | Compatible Power Unit |
