Description

Not for real photos. All pictures are for reference only.

The SAI143-S33 is a SIL 3 certified safety analog input module for Yokogawa ProSafe‑RS safety instrumented system, used for ESD, fire & gas and safety interlock loops. It acquires 4–20 mA signals from pressure, flow, level and temperature transmitters, converts field analog values into digital safety data with built-in comprehensive diagnostics. This S33 variant does not support HART. It supports dual redundant configuration and hot swap, and adopts ISA G3 anti-corrosion coating for harsh plant environments. It is widely used in refineries, chemical, offshore and power safety control systems.

Technical Specifications

• Brand: Yokogawa
• Model: SAI143-S33
• Warranty: One Year
• Condition: 100% New & Original
• Input/Output: 16 fully isolated channels, 4–20 mA; supports 2-wire / 4-wire transmitters, loop power supply
• Operating Temp: -20°C to +70°C
• Communication: ProSafe‑RS internal safety control bus
• Accuracy: ±16 µA within 1–23 mA range
• Update Rate: 40 ms
• Isolation: 1.5 kV AC isolation between field side and safety logic
• Certification: SIL 3, IEC 61508
• Protection: ISA‑S71.04 G3 conformal coating
• Redundancy: Dual redundant module pairing supported
• Hot Swap: Yes
• Diagnostics: Overrange, underrange, loop break, internal self-check, watchdog
• Compatible System: ProSafe‑RS SCS, integrates with CENTUM VP
• Weight: Approx. 0.34 kg
• Mounting: Standard ProSafe‑RS nest rack slot
• Note: SAI143-Hxx series is the HART-enabled version

YOK-SAI143-S33 Alt text: Yokogawa SAI143-S33 16-channel SIL3 safety analog input module, ProSafe-RS SIS 4-20mA non-HART I/O card