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- Yokogawa
- SDV144-S33 S2
- Digital Input Module
- Japan
- 25 mm × 100 mm × 130 mm
- 0.31kg
- Xiamen, China
- New & In Stock
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Safety Digital Input Module Overview
Model: SDV144-S33 S2
1. Brand and Series Information
The SDV144-S33 S2 belongs to an industrial safety digital input module family used in safety instrumented systems (SIS) and distributed control system architectures.
It is part of a modular safety I/O platform designed for reliable acquisition, monitoring, and transmission of discrete field signals from safety-related devices.
The series is widely applied in high-risk industrial environments where fast response, fault diagnostics, redundancy, and long-term stability are required for safe operation.
2. Product Overview
The SDV144-S33 S2 is a safety-grade digital input module designed for monitoring ON/OFF status signals from field devices in industrial automation systems.
It is used to acquire signals from emergency shutdown devices, safety interlocks, limit switches, and alarm contacts.
The module ensures stable signal transmission to safety controllers while maintaining strong electrical isolation between field wiring and control logic.
The S2 version indicates an upgraded revision with improved internal processing stability and enhanced diagnostic performance.
3. Technical Parameters
| Parameter | Specification |
|---|---|
| Signal Type | Safety digital input |
| Function | Safety signal acquisition and monitoring |
| Input Channels | Multi-channel digital input configuration |
| Input Voltage | 24 V DC industrial standard |
| Response Time | ≤ 10 ms |
| Diagnostic Function | Advanced channel-level diagnostics |
| System Version | S2 upgraded revision |
| Isolation Voltage | Up to 1500 V AC |
| Power Supply | 24 V DC |
| Power Consumption | Low-power safety design |
| Operating Temperature | -20°C to +60°C |
| Storage Temperature | -40°C to +70°C |
| Humidity Range | 5% – 95% non-condensing |
| Mounting Type | Rack / backplane installation |
| EMC Protection | High immunity industrial safety design |
| Dimensions (W × H × D) | 25 mm × 100 mm × 130 mm |
| Weight | 0.31 kg |
4. Product Introduction
The SDV144-S33 S2 is designed for safety-critical signal monitoring in industrial automation systems.
It continuously collects digital status signals from field devices and transmits them to safety controllers for processing and system decision-making.
The module is optimized for fast response and stable operation, ensuring reliable detection of abnormal or hazardous conditions.
The S2 revision enhances processing stability and diagnostic accuracy compared to standard configurations.
5. Applications
The SDV144-S33 S2 is widely used in industrial safety systems, including:
- Emergency shutdown systems (ESD)
- Fire and gas detection systems
- Safety interlock systems
- Petrochemical processing facilities
- Power generation safety systems
- Water treatment and distribution systems
- Industrial machinery protection systems
It is especially suitable for environments requiring high reliability and fast safety response.
6. Product Advantages
Enhanced Safety Performance
Designed for safety instrumented systems with improved stability and diagnostics.
Fast Response Capability
Ensures rapid detection of safety-related signal changes.
Strong Electrical Isolation
Protects control systems from external electrical interference.
Advanced Diagnostics (S2 Version)
Improved fault detection and channel monitoring.
Compact Modular Structure
Supports high-density installation in control cabinets.
High Operational Stability
Suitable for continuous long-term industrial operation.
7. Similar Models (Same Series / Related Safety Modules)
| Model | Description | Signal Type | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| SDV144-S31 S2 | Standard safety input module | Digital input | 25 × 100 × 130 | 0.29 |
| SDV144-S32 S2 | Enhanced diagnostic version | Safety DI module | 25 × 100 × 130 | 0.30 |
| SDV144-S33/B4D00 S2 | Alternate configuration model | Safety input module | 25 × 100 × 130 | 0.31 |
| SDV144-S34 S2 | Expanded channel model | Multi-channel safety input | 28 × 100 × 130 | 0.32 |
| SDV144-S35 S2 | High isolation reinforced model | Safety-grade input module | 25 × 105 × 135 | 0.33 |
8. Popular Models (Same Brand – Industrial Automation Modules)
| Model | Description | Function | Dimensions (mm) | Weight (kg) |
|---|---|---|---|---|
| ADV151-P00 S2 | Digital input module | Signal acquisition | 12 × 100 × 110 | 0.17 |
| ADV551-P50 S1 | Analog output module | Signal transmission output | 15 × 100 × 115 | 0.20 |
| AAI141-S00 S1 | Analog input module | Process signal measurement | 12.5 × 100 × 115 | 0.18 |
| AAI543-S50 S1 | Multi-channel analog input module | High-density signal acquisition | 15 × 105 × 120 | 0.23 |
| ADV859-P10 S1 | Communication module | System data communication | 20 × 110 × 130 | 0.25 |
9. Summary
The SDV144-S33 S2 is a safety digital input module designed for reliable monitoring of field device signals in industrial safety systems.
It is widely used in applications requiring fast response, advanced diagnostics, and high system integrity.
Its S2 upgraded architecture, modular design, and strong electrical isolation make it suitable for modern safety instrumented system environments.