Description
YOKOGAWA SNB10D-425/CU2N Product Overview
The YOKOGAWA SNB10D-425/CU2N is a high-performance signal conditioner and isolator specifically designed for intrinsically safe applications in hazardous areas. This advanced unit provides secure signal conversion and isolation while meeting stringent explosion-proof requirements for Zone 1/21 environments.
Key Features
✔ Intrinsically safe I/O channels (Ex ia IIC T4)
✔ Universal signal conditioning (TC, RTD, mA, V)
✔ ±0.1% accuracy for precise measurement
✔ Dual-compartment design for enhanced safety
✔ ATEX/IECEx certified for hazardous areas
Technical Specifications
| Parameter | Specification |
| Model | SNB10D-425/CU2N |
| Manufacturer | YOKOGAWA |
| Type | Intrinsically Safe Signal Conditioner |
| Hazardous Area Cert. | ATEX, IECEx (Zone 1/21) |
| Input Signals | TC (J/K/T/E), RTD (Pt100), 4-20mA, 0-10V |
| Output Signals | 4-20mA (isolated) |
| Isolation | 1500V AC (input/output/power) |
| Accuracy | ±0.1% of span |
| Entity Parameters | Ui=28V, Ii=93mA, Pi=0.65W |
| Operating Temp. | -20°C to +60°C |
| Power Supply | 20-30V DC (safe area) |
| Dimensions | 22.5mm (W) × 110mm (H) × 115mm (D) |
YOKOGAWA SNB10D-425/CU2N
Main Features & Benefits
1. Hazardous Area Safety
Ex ia IIC T4 certification for gas/dust environments
Galvanic isolation between hazardous/safe areas
Dual-compartment housing separates IS/non-IS circuits
2. Precision Signal Conditioning
Cold junction compensation for TC inputs
Linearization for RTD measurements
Advanced filtering for noise rejection
3. Maintenance & Diagnostics
LED status indicators for quick troubleshooting
Terminal accessibility for easy maintenance
Predictive failure detection
Application Field
Oil & Gas
✔ Offshore platform instrumentation
✔ Refinery process monitoring
✔ Gas compression stations
Chemical/Pharmaceutical
✔ Reactor temperature monitoring
✔ Solvent handling areas
✔ Batch process control
Mining/Dust Environments
✔ Coal processing plants
✔ Grain silo monitoring
✔ Explosive dust areas
YOKOGAWA SNB10D-425/CU2N
Related Products
| Model | Description |
| SNB10D-425/CU2T | Temperature-focused version |
| SNB20D-425 | Dual-channel IS conditioner |
| YTA320-IS | IS temperature transmitter |
| ADM11B-IS | Legacy IS signal converter |
Installation & Maintenance
Installation Requirements
Must be installed by Ex-certified personnel
Proper IS cabling per IEC 60079-14
Barrier verification per control drawing
Maintenance Procedures
Annual IS compliance checks
Calibration verification every 2 years
Terminal inspections every 6 months
