High-Density Signal Acquisition for Stable Industrial Control Performance
The Yokogawa SDV144 Digital Input Module is a robust 16-channel input solution designed for precise acquisition of field contact signals in advanced distributed control and safety systems. Built for reliability in mission-critical industrial environments, this module ensures accurate signal detection, electrical isolation, and stable integration within Yokogawa automation architectures.
Engineered for continuous operation, the SDV144 is widely used in process industries where signal integrity, fast response, and system stability are essential for safe and efficient plant performance.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Yokogawa |
| Model | SDV144 |
| Product Type | Digital Input Module |
| Input Channels | 16 channels (individually isolated) |
| Input Signal Type | No-voltage contact (dry contact) |
| ON Resistance | ≤ 1 kΩ |
| OFF Resistance | ≥ 100 kΩ |
| Input Current | 6 mA ± 20% (at 24 V DC, 0 Ω input) |
| External Power Supply | 24 V DC (+20% / -10%) |
| Supply Current Capacity | Up to 200 mA |
| Maximum Input Voltage | 30 V DC (instantaneous) |
| Input Response Time | ≤ 40 ms |
| Isolation | 2 kV AC (between field and system, 1 min) |
| Current Consumption | 290 mA (5 V DC), 140 mA (24 V DC) |
| Installation | Rack-mounted module |
| Operating Temperature | -20°C to +70°C |
| Dimensions | 130 × 32.8 × 107.5 mm |
| Weight | Approx. 0.36–0.41 kg |
Industrial Applications
The SDV144 module is widely deployed in automation and safety-critical environments, including:
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Oil & gas production and refining systems
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Petrochemical processing plants
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Power generation stations
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Water and wastewater treatment facilities
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Chemical manufacturing plants
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Pharmaceutical production lines
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Industrial safety shutdown systems (ESD)
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Burner management systems (BMS)
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Process interlock and alarm monitoring
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Large-scale distributed control systems (DCS)
Its reliability makes it a preferred choice for facilities requiring continuous monitoring of discrete field signals.
Key Advantages
High Signal Integrity
Ensures stable detection of dry contact signals with strong noise immunity.
Industrial-Grade Isolation
Module-level electrical isolation enhances safety and reduces fault propagation risk.
Fast Response Performance
With a response time of up to 40 ms, it supports real-time control applications.
Flexible System Integration
Seamlessly integrates into Yokogawa CENTUM and ProSafe systems.
Compact High-Density Design
Enables efficient use of cabinet space without sacrificing performance.
Built for Harsh Environments
Operates reliably under wide temperature ranges and industrial vibration conditions.
Low Maintenance Requirement
Designed for long service life with minimal operational intervention.
Technical FAQs
1. What is the main function of the SDV144 module?
It collects and processes digital input signals from field devices such as switches and contact sensors.
2. How many input channels does it support?
It supports 16 isolated digital input channels.
3. What type of signals does it accept?
Dry contact (no-voltage) signals from field instruments.
4. Is the module suitable for safety systems?
Yes, it is widely used in safety instrumented and interlock systems.
5. What is the response time?
The input response time is up to 40 milliseconds.
6. What is the operating temperature range?
-20°C to +70°C.
7. Does it support electrical isolation?
Yes, it provides 2 kV AC isolation between field and system.
8. What is the module’s weight?
Approximately 0.36 to 0.41 kg depending on configuration.
9. Can it be used in redundant systems?
Yes, it supports redundancy configurations in compatible systems.
10. Why is SDV144 widely used in industry?
Because of its reliability, stable signal processing, and long-term durability in critical automation environments.
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