Overview

The Yokogawa SAI533-H33 Analog Output Module is designed to provide accurate and reliable analog signals to field devices such as valves, actuators, and regulators. With 8 galvanically isolated output channels, it ensures safe, interference-free operation in complex industrial environments, making it suitable for safety-critical applications.

The module supports rated output ranges of 1.25–23 mA, with a standard 4–20 mA range, offering ±48 µA accuracy and ±16 µA/10°C temperature drift. Its 40 ms data update frequency enables responsive control, while 1.5 kV AC isolation and compatibility with resistive loads of 230–600 Ω ensure reliability under harsh conditions.

Compact in design and compatible with Yokogawa’s ProSafe-RS platform, the SAI533-H33 is ideal for industries such as oil & gas, chemical processing, and power generation.

Technical Data

Typical Applications

• Safety Instrumented Systems (SIS): Provides precise analog signals to control valves, dampers, and other final elements.

• Chemical Processing Plants: Regulates flow, pressure, and other process variables in hazardous environments.

• Oil & Gas Facilities: Interfaces with actuators in emergency shutdown and flare systems.

• Power Generation: Controls turbine and boiler operations requiring high-accuracy analog outputs.

• OEM Safety Panels: Integrated into SIL-rated control cabinets for critical analog control.

Example: In a refinery SIS, the SAI533-H33 accurately positions control valves based on real-time process data, maintaining safe operating conditions and ensuring process efficiency.

FAQ

Q: How many analog outputs does the SAI533-H33 support?
A: 8 galvanically isolated analog output channels.

Q: What is the standard output range?
A: Rated 4–20 mA, with an extended range of 1.25–23 mA.

Q: Is it suitable for safety-critical applications?
A: Yes, it is designed for use in Yokogawa’s ProSafe-RS safety instrumented systems.

Q: What kind of loads can it drive?
A: Supports resistive loads between 230–600 Ω.

Q: What is the update frequency?
A: Output data is updated every 40 milliseconds.