Process Safety Automation Solution – Yokogawa SNB10D-425/CU2T | ProSafe-RS Series
Where This Product Is Used
The Yokogawa SNB10D-425/CU2T Safety Node Unit is a core I/O module within the ProSafe-RS Safety Instrumented System (SIS), purpose-built for safety-critical process environments. Engineers specify this module across the following industries and applications:
- Oil & Gas (Upstream/Downstream): Emergency Shutdown (ESD) systems, wellhead control panels, and pipeline protection loops
- Petrochemical & Chemical Plants: Burner Management Systems (BMS), reactor over-pressure protection, and toxic gas detection interlocks
- Power Generation: Turbine trip systems, boiler safety shutdowns, and generator protection circuits
- LNG & Refinery Facilities: Fire & Gas (F&G) detection integration and high-integrity pressure protection systems (HIPPS)
- Pharmaceutical Manufacturing: Critical process containment and cleanroom environmental safety loops
- Water & Wastewater Treatment: Pump protection, overflow prevention, and chemical dosing safety interlocks
Technical Specifications
| Part Number | SNB10D-425/CU2T |
| Series | ProSafe-RS |
| Manufacturer | Yokogawa Electric Corporation |
| Module Type | Safety Node Unit (SNB) |
| Safety Integrity Level | SIL 2 (IEC 61508 certified) |
| Communication Bus | Vnet/IP (Ethernet-based safety bus) |
| I/O Configuration | Digital Input / Output (per variant suffix) |
| Power Supply | 24 VDC (redundant supply supported) |
| Operating Temperature | 0°C to +60°C |
| Humidity | 5% to 95% RH (non-condensing) |
| Weight | 2,480 g |
| Mounting | DIN rail / rack-mount chassis |
| Certifications | IEC 61508, IEC 61511, TÜV SÜD |
| Country of Origin | Japan |
Why Engineers Specify This Model
- Proven SIL 2 Architecture: Hardware fault tolerance (HFT=1) with diagnostic coverage exceeding 99%, meeting IEC 61508 Part 2 requirements out of the box
- Seamless ProSafe-RS Integration: Native compatibility with Yokogawa’s CENTUM VP DCS and ProSafe-RS SIS for unified engineering and operator interface
- High Channel Density: Maximizes cabinet space efficiency in brownfield retrofits and greenfield SIS designs
- Redundancy Support: Supports 1oo2 and 2oo3 voting logic configurations for high-demand safety loops
- Deterministic Response Time: Fast scan cycle ensures sub-100ms safety response for time-critical shutdown functions
- Long Product Lifecycle: Yokogawa’s 10-year minimum parts availability commitment reduces lifecycle risk for long-term plant operations
Complete System Bill of Materials
The SNB10D-425/CU2T is typically deployed alongside the following ProSafe-RS components:
- Yokogawa SSC60D – Safety Supervisory Controller
- Yokogawa SCP401 / SCP451 – Safety Control Processor
- Yokogawa SB401 / SB801 – Safety Node Bus Coupler
- Yokogawa SER – Safety Engineering Workstation (ProSafe-RS Studio)
- Yokogawa PFCS – Power Supply for Field Control Station
- Yokogawa VJ77 / VJ78 – Vnet/IP Communication Modules
Contact support@konmask.com for complete BOM quotations and system integration support.
Compliance & Industry Standards
- IEC 61508: Functional Safety of E/E/PE Safety-related Systems (SIL 2 certified)
- IEC 61511: Functional Safety – Safety Instrumented Systems for the Process Industry
- ANSI/ISA-84: Application of Safety Instrumented Systems for the Process Industries
- TÜV SÜD Certified: Third-party safety assessment and certification
- CE Marking: Compliant with EU Machinery Directive and EMC Directive
- RoHS Compliant: Restriction of Hazardous Substances
Quality Assurance & Sourcing
Every Yokogawa SNB10D-425/CU2T unit supplied by Konmask.com undergoes the following verification process:
- ✔ Visual inspection against Yokogawa OEM packaging and label standards
- ✔ Serial number traceability verification
- ✔ Functional power-on test where applicable
- ✔ Anti-static packaging and climate-controlled storage
- ✔ Export documentation support (CO, packing list, commercial invoice)
We source directly from authorized Yokogawa distributors and certified secondary market channels. All units are guaranteed genuine.
How to Source This Part
- Submit your RFQ via support@konmask.com with your required quantity and delivery timeline
- Receive a formal quotation within 1 business day including lead time and shipping options
- Confirm order and receive proforma invoice
- Unit ships with full documentation: datasheet, test report, and certificate of conformance
- Track your shipment via our logistics portal or dedicated account manager
We support DDP, DAP, FOB, and EXW Incoterms. Payment via T/T, L/C, and major credit cards accepted.
Application-Specific FAQ
Q: Can the SNB10D-425/CU2T be used in a SIL 3 application?
A: The SNB10D-425/CU2T is certified to SIL 2. For SIL 3 requirements, a redundant 1oo2D or 2oo3 architecture using multiple SIL 2 modules may be engineered to achieve SIL 3 at the safety function level. Consult your functional safety engineer.
Q: Is this module compatible with CENTUM VP?
A: Yes. ProSafe-RS integrates natively with Yokogawa CENTUM VP via Vnet/IP, enabling unified HMI, alarm management, and engineering environment.
Q: What is the typical lead time for the SNB10D-425/CU2T?
A: Stock availability varies. Contact us for real-time inventory status. Expedited sourcing is available for shutdown and turnaround projects.
Q: Do you provide a warranty?
A: Yes. All units carry a minimum 12-month warranty against manufacturing defects. Extended warranty options are available upon request.
Q: Can you supply the full ProSafe-RS system, not just this module?
A: Yes. Konmask.com specializes in complete SIS system sourcing including controllers, I/O modules, power supplies, and communication components. Submit your full BOM for a consolidated quote.
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Contact: support@konmask.com | +0086 19859288691
