Product Description
The SAI143-S53/A4S00 is a high-integrity analog input module specifically engineered for the Yokogawa Electric Corporation ProSafe-RS Safety Instrumented System (SIS). Unlike standard control modules, this unit is built to comply with SIL3 safety requirements, providing 16 channels of isolated 4–20 mA inputs for critical monitoring in safety-critical applications.
It performs continuous self-diagnostics to detect internal failures and abnormal operating conditions, ensuring that safety loops remain operational in hazardous environments. This makes the module ideal for Emergency Shutdown (ESD), Fire & Gas (F&G), and other high-risk protection systems.
The SAI143-S53/A4S00 variant features ISA S71.04 G3 conformal coating, providing enhanced resistance against corrosive atmospheres such as sulfur compounds, salt-laden air, and chemical vapors—making it particularly suitable for offshore and petrochemical installations.
Detailed Technical Specifications
| Parameter | Specification |
|---|---|
| Model Designation | SAI143-S53/A4S00 |
| System Platform | ProSafe-RS (SIS) |
| Safety Integrity Level | SIL3 (Certified by TÜV Rheinland) |
| Input Channels | 16 channels, channel-to-channel and system isolation |
| Signal Type | 4–20 mA DC current input |
| Input Impedance | 250 Ω (nominal) |
| Maximum Input Current | 25 mA |
| Conversion Accuracy | ±0.1% of full scale |
| Data Refresh Cycle | 40 ms (internal safety processing) |
| Isolation Withstand Voltage | 500 V AC (input-to-system) |
| Operating Temperature | -20°C to +70°C |
| Weight | 0.45 kg |
Industrial Applications
The SAI143-S53/A4S00 is widely deployed in industries where functional safety compliance is mandatory and system reliability is critical:
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Emergency Shutdown Systems (ESD) on offshore oil platforms
-
Burner Management Systems (BMS) for industrial boilers and furnaces
-
Toxic and flammable gas detection systems
-
Overpressure protection loops in chemical reactors
-
Safety monitoring in power generation and petrochemical plants
FAQ & Comparison
What is the difference between AAI143 and SAI143?
The AAI143 is designed for the CENTUM VP Distributed Control System (DCS) for general process control. In contrast, the SAI143-S53/A4S00 is a dedicated safety module for ProSafe-RS, incorporating advanced diagnostics and SIL3 certification for safety instrumented loops.
Does this module support dual-redundant configurations?
Yes. The SAI143-S53/A4S00 can be installed in redundant pairs within ProSafe-RS safety nodes, increasing system availability while maintaining SIL3 compliance.
What does the S53 suffix signify?
The “S53” suffix denotes the standard hardware configuration with enhanced G3 conformal coating for operation in harsh industrial environments with high sulfur content or marine exposure.
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| Shipping Port | ShangHai, Xiamen |
| Warranty | 12 Months |
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