



Introduction
The Yokogawa SAV144 Voltage Input Module is a high-density, isolated analog input module designed for ProSafe-RS safety systems and Yokogawa distributed control architectures. It is engineered to accurately acquire voltage signals from field instrumentation and convert them into stable digital data for process monitoring and safety logic execution.
This module is widely used in mission-critical industrial environments where signal accuracy, electrical isolation, and system redundancy are essential for safe and reliable operations.
Technical Specifications
| Parameter | Specification |
|---|
| Manufacturer | Yokogawa |
| Model Number | SAV144 |
| Product Type | Voltage Input Module |
| System Compatibility | ProSafe-RS / CENTUM VP / FCS architectures |
| Input Channels | 16 channels, individually isolated |
| Input Signal Range | 1–5 V DC / 1–10 V DC |
| Permissible Input Range | ±30 V DC |
| Input Impedance | 1 MΩ (power ON), 100 kΩ (power OFF) |
| Accuracy | ±4 mV (1–5 V), ±9 mV (1–10 V) |
| Data Update Cycle | ~40 ms |
| Temperature Drift | ±4 mV/10°C (1–5 V), ±9 mV/10°C (1–10 V) |
| Withstand Voltage | 1.5 kV AC for 1 minute |
| Maximum Current Consumption | 300 mA (5 V system), 140 mA (24 V system) |
| External Connection Types | Pressure clamp terminal / MIL connector / KS1 cable |
| Redundancy Support | Supported in dual-redundant configuration |
| Operating Temperature | -20°C to +70°C |
| Storage Temperature | -40°C to +85°C |
| Weight | ~0.24–0.29 kg |
| Installation Type | FCU / ESB bus node mounting |
Applications
The Yokogawa SAV144 module is widely deployed in high-reliability automation and safety systems:
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Yokogawa ProSafe-RS safety instrumented systems (SIS)
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CENTUM VP distributed control systems
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Oil & gas refinery monitoring and control systems
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Petrochemical and chemical processing plants
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Power generation instrumentation systems
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Water treatment and utility automation
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Industrial SCADA and process data acquisition
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High-integrity analog signal monitoring systems
Technical FAQs
Q1: What is the main function of the SAV144 module?
A: It acquires and processes voltage input signals from field instruments for control and safety systems.
Q2: How many channels does it support?
A: It supports 16 isolated voltage input channels.
Q3: What signal types are supported?
A: 1–5 V DC and 1–10 V DC voltage signals.
Q4: Is it suitable for safety systems?
A: Yes, it is commonly used in ProSafe-RS safety instrumented systems.
Q5: What happens if a channel is overloaded?
A: The module is designed to tolerate up to ±30 V without damage.
Q6: Can it operate in redundant configurations?
A: Yes, dual-redundant configurations are supported.
Q7: What is the update speed?
A: Approximately 40 ms data refresh cycle.
Q8: What wiring methods are supported?
A: Pressure clamp, MIL connector cable, and KS1 dedicated cable.
Q9: Where is it typically installed?
A: Inside Field Control Units (FCU) or ESB bus node units.
Q10: Why is it important in DCS/SIS systems?
A: It ensures accurate and isolated voltage measurement for safe and stable process control.