Yokogawa SAI533-H33/PRP S1 | 8-Channel Analog Output Module for ProSafe-RS

The Yokogawa SAI533-H33/PRP S1 is a high-performance safety analog output module designed for use within the ProSafe-RS safety instrumented system. This module features 8 channels of isolated 4 to 20 mA outputs, specifically engineered to drive safety-critical actuators such as control valves and dampers. The “H33” designation indicates support for HART communication, while the “PRP” suffix signifies Parallel Redundancy Protocol support, ensuring seamless network availability and high-speed data synchronization in redundant safety configurations.

Product Specifications and Datasheet

  • Model Number: SAI533-H33/PRP S1

  • Number of Channels: 8 channels, isolated

  • Output Signal: 4 to 20 mA DC

  • Safety Integrity Level: Suitable for SIL 3 applications

  • Communication: HART protocol support (H33) and PRP (Parallel Redundancy Protocol)

  • Allowable Load Resistance: 0 to 750 Ω

  • Accuracy: ±0.1% of full scale

  • Dimensions: 130 mm x 45 mm x 130 mm

  • Weight: Approximately 0.52 kg

  • Country of Origin: Japan

Application Areas

The SAI533 is critical for safety loops in high-risk industrial sectors:

  • Oil & Gas: Controlling emergency shutdown (ESD) valves and blowdown valves.

  • Chemical Manufacturing: Managing safety-rated valve positioners in volatile chemical reactors.

  • Power Generation: Precise modulation of fuel and steam control valves for boiler protection.

  • Refineries: Managing critical interlocks and fire & gas (F&G) system actuators.

Product Instructions for Use

  1. Installation: Ensure the ProSafe-RS station is powered correctly before inserting the module. Slide the SAI533 into the assigned slot on the safety node (ANB10/ANB11) and tighten the screws to ensure proper grounding through the backplane.

  2. Field Wiring: Connect the field actuators to the corresponding terminals. Ensure that the 4-20mA loop polarity is observed. It is recommended to use shielded twisted-pair cables to prevent signal interference.

  3. Redundancy Setup: If utilizing the PRP functionality, verify that the module is correctly linked to both redundant network paths. This allows the module to maintain communication even if one network path fails.

  4. HART Diagnostics: Use the Yokogawa Plant Resource Manager (PRM) to access advanced diagnostics and calibration data from the connected HART-enabled actuators.

  5. YOKOGAWA SAI533-H33/PRP S1 Analog Output Module

Q&A: Frequently Asked Questions

Q1: What does the PRP S1 designation provide? A1: PRP (Parallel Redundancy Protocol) allows the module to send and receive data over two independent networks simultaneously, providing zero-recovery-time redundancy. The S1 refers to the specific hardware design revision.

Q2: Can this module be used in standard DCS systems? A2: No, the SAI533 is specifically designed for the ProSafe-RS safety system. For standard control applications, the AAI543 series is typically used.

Q3: Does the module support line monitoring for field wiring? A3: Yes, the SAI533 includes built-in diagnostics to detect open-circuit and short-circuit conditions in the field loops, which is essential for maintaining SIL 3 compliance.

Recommended Similar Models

  • SAI533-H03: Standard 8-channel safe analog output module without PRP support.

  • SAI143-H33: 16-channel safe analog input module with HART support.

  • SAV144-S53: Digital input module for ProSafe-RS safety systems.

  • SAI533-H33/LCH: Harsh environment version with G3 conformal coating.

  • SDV541-S53: 16-channel safe digital output module for driving solenoids and relays.

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