SAI143-S53 ProSafe-RS Analog Input Module | Yokogawa

Product Overview

The Yokogawa SAI143-S53 serves as a high-precision analog input interface within the ProSafe-RS Safety Instrumented System (SIS). This module monitors 16 isolated channels of 4 to 20 mA signals, providing critical data for emergency shutdown (ESD) and fire and gas (F&G) applications. It delivers the fast response times and high accuracy required to maintain Safety Integrity Level (SIL) standards in complex industrial processes. We supply this module as 100% Brand New and Original, ensuring your safety loops meet all regulatory and factory performance mandates.

Part Number Breakdown

Technical Specifications

• Channels: 16 isolated analog input channels.

• Signal Range: 4 to 20 mA DC.

• Accuracy: ±0.1% of full scale.

• Resolution: 16 bits (High-resolution signal conversion).

• Input Impedance: 100 kΩ.

• Temperature Range: -25 to 70°C (Extended operating environment).

• Withstanding Voltage: 1.5 kV AC between input signal and system logic.

• EMI/RFI Immunity: Complies with IEC 61000-4-3 and IEC 61000-4-4 standards.

• Power Supply: 24 VDC ±10%.

• Dimensions: 25 mm x 123 mm x 98 mm.

Engineering Advantages

• Superior Signal Isolation: Each channel provides individual galvanic isolation, which blocks ground loops and electrical noise. This architecture prevents a fault on one field instrument from propagating through the safety rack, ensuring the integrity of the remaining 15 safety loops.

• Harsh Environment Resilience: The "S53" variant features ISA G3 conformal coating and an extended temperature rating (-25 to 70°C). This allows for reliable deployment in non-climate-controlled marshaling cabinets and locations exposed to corrosive gases like $H_2S$ or $SO_2$.

• Advanced Noise Immunity: The module incorporates high-level EMI/RFI shielding according to IEC 61000 standards. It maintains high accuracy even when installed near variable frequency drives (VFDs) or heavy switchgear that typically generates significant electromagnetic interference.

• High-Density Marshalling: The compact 25mm width optimizes rack space in the ProSafe-RS nest. This allows engineers to consolidate more safety I/O points into a smaller cabinet footprint, reducing total hardware costs and simplifying wiring management.

FAQs

• Does the SAI143-S53 support HART communication?

  No. The "S" designation indicates the standard analog input model. For HART digital communication and remote device diagnostics, you must select the SAI143-H series modules.

• Can I install this module in a standard CENTUM VP station?

  The SAI143-S53 specifically targets ProSafe-RS Safety Instrumented Systems. While physical footprints may appear similar to DCS modules, you must use this in safety-certified nests to comply with SIS functional safety requirements.

• Is this a refurbished or pull-out unit?

  Absolutely not. We guarantee this product is 100% Brand New. It arrives in original Yokogawa factory packaging with the original serial number and factory seal intact.

• How does the 16-bit resolution benefit my safety system?

  The 16-bit resolution allows the system to detect minute changes in process pressure, flow, or level. This sensitivity ensures the safety controller reacts to developing hazards before they breach critical trip limits, enhancing overall plant safety.