YOKOGAWA SAI143-H33

Description

1. Detailed parameter table

YOKOGAWA SAI143-H33

2. Product introduction

The YOKOGAWA SAI143-H33 is a high-precision industrial analog input module designed to accurately 采集 (acquire) and convert analog signals from field sensors into digital data for industrial control systems. Unlike the digital output-focused S2BN5D-121 DO, this module specializes in capturing continuous process variables, serving as a critical link between field instruments and control systems (such as the CP461-50 PLC).

Featuring 8 channels that support both voltage (0-10V DC) and current (4-20mA DC) inputs, the SAI143-H33 can connect to a wide range of sensors, including temperature transmitters, pressure transducers, and flow meters. With 16-bit resolution and ±0.05% accuracy, it ensures precise measurement of subtle process changes, which is essential for maintaining tight control over industrial processes. The module’s robust isolation design and wide operating temperature range (-20°C to 70°C) make it suitable for harsh environments in industries such as oil and gas, chemical processing, and power generation. As a key component in data acquisition systems, the YOKOGAWA SAI143-H33 provides reliable and accurate input data, enabling control systems to make informed decisions and optimize process performance.

3. Core advantages and technical highlights

High-precision measurement capabilities:

With 16-bit resolution and ±0.05% accuracy, the SAI143-H33 outperforms many standard analog input modules. In a pharmaceutical manufacturing reactor, it can detect minute changes (as small as 0.02mA in a 4-20mA signal) in temperature or pressure, ensuring that the reaction stays within the tight tolerances required for drug production. This precision helps maintain product consistency and compliance with regulatory standards.

Dual-input type support:

The module’s ability to accept both voltage (0-10V) and current (4-20mA) signals eliminates the need for separate modules for different sensor types. In a water treatment plant, it can simultaneously measure pH levels (via 4-20mA transmitters) and chemical dosage levels (via 0-10V sensors) through the same module, simplifying system architecture and reducing costs. This flexibility also allows easy integration with legacy and new sensors alike.

Enhanced noise rejection:

Equipped with advanced filtering (50Hz/60Hz notch filters and low-pass filters), the SAI143-H33 effectively suppresses electrical noise from industrial environments. In a factory with heavy machinery (powered by the PW702 power supply), it ensures that pressure readings from hydraulic systems remain stable, even amid electromagnetic interference from motors and drives. This noise rejection is critical for preventing false readings that could lead to incorrect control actions by the PLC (like the CP461-50).

Extended temperature range and ruggedness:

Operating reliably in -20°C to 70°C, the SAI143-H33 thrives in extreme environments where the S2BN5D-121 DO might face limitations. In an Arctic oil pipeline monitoring system, it accurately measures flow rates and pressure in freezing conditions, ensuring the control system receives accurate data to prevent pipeline bursts. Its rugged design also resists vibration (10-2000Hz, 15g peak) and shock (30g peak), making it suitable for mobile industrial equipment.

YOKOGAWA SAI143-H33

4. Typical application scenarios

In an oil refinery’s distillation column control system, the SAI143-H33 collects data from multiple sensors, including temperature probes at various stages of the column, pressure transducers, and level sensors. It converts these analog signals into digital data for the CP461-50 PLC, which uses the information to adjust heating rates and valve positions (via the S2BN5D-121 DO module) to optimize separation efficiency. The module’s high accuracy ensures that even small changes in temperature (as little as 0.1°C) are detected, preventing costly process deviations.

In a solar power plant, the SAI143-H33 monitors the performance of solar panels by measuring current and voltage outputs from string inverters (via 0-10V signals) and environmental conditions (such as irradiance and ambient temperature via 4-20mA sensors). This data is sent to the central control system, which uses it to adjust panel angles and track the sun for maximum energy production. The module’s wide temperature range allows it to operate in the hot, sun-exposed control cabinets of desert solar farms.

In a food and beverage production line, the module measures variables like mixer speed (via 4-20mA tachometers), ingredient flow rates (via 0-10V flow meters), and tank levels. This information is used by the PLC to control motor speeds and valve positions (through the S2BN5D-121 DO module), ensuring consistent product quality. The module’s accuracy is particularly important for batch processes, where precise ingredient proportions are critical.

5. Related model recommendations

• SAO143-H33: YOKOGAWA’s analog output module, complementary to the SAI143-H33, for sending control signals to actuators and valves based on the input data collected.
• SAI144-H33: A 16-channel variant of the SAI143-H33for larger systems requiring more input points, offering the same precision and features.
• S2BN5D-121 DO: The digital output module that works with the SAI143-H33in control loops, executing actions based on the analog data collected by the input module.
• CP461-50: The high-performance PLC that processes data from the SAI143-H33, using it to make real-time control decisions and coordinate with other system components.
• PW482-10 S2: The dual-input power supply that provides stable power to the SAI143-H33, ensuring consistent measurement accuracy even in fluctuating power conditions.
• F3PU50-0N: The HMI panel that displays real-time data from the SAI143-H33, allowing operators to monitor process variables and respond to alarms.

6. Installation, commissioning and maintenance instructions

Installation preparation

Before installing the SAI143-H33, ensure the mounting rail is securely fastened in a control cabinet with ambient temperature between -20°C and 70°C. Prepare tools including a torque screwdriver (0.5-1.5Nm), wire strippers, a multimeter, and a precision signal generator for calibration.

Verify that the backplane power (typically 5V DC from the PLC rack) is within specifications. Use shielded twisted-pair cables for all sensor connections, with the shield grounded at the sensor end to minimize noise. For current inputs, ensure proper wiring (including loop power if required by the sensor), and for voltage inputs, use short cable runs to prevent signal degradation. Label each channel clearly to match the connected sensor, simplifying troubleshooting.

Maintenance suggestions

Perform quarterly visual inspections of the SAI143-H33 to check for loose connections, dust accumulation, or signs of corrosion. Clean the module’s surface with a dry, lint-free cloth if necessary, taking care not to disturb wiring. Calibrate the module annually using a precision signal generator to maintain its ±0.05% accuracy—this is especially important in applications with strict regulatory requirements.

Monitor the module’s status indicators: a steady green LED indicates normal operation, while red or flashing LEDs signal faults (e.g., overvoltage, communication errors). Use the PLC’s diagnostic software to check for drift in individual channels, which may indicate a need for recalibration or sensor replacement. If a channel fails, first test the connected sensor and wiring before replacing the module.

Store spare modules in a dry, temperature-controlled environment, preferably in anti-static packaging. Keep a record of calibration dates and results to track the module’s performance over time, and document sensor assignments for quick reference during maintenance.

7. Service and guarantee commitment

YOKOGAWA provides a 5-year warranty for the SAI143-H33, reflecting confidence in its precision and durability. Each module undergoes rigorous testing, including temperature cycling, vibration testing, and accuracy verification across its operating range, ensuring compliance with industrial standards.

Our technical support team includes specialists in analog signal processing, offering 24/7 assistance for installation, calibration, and troubleshooting. On-site support is available in major industrial regions with a 48-hour response time for non-critical issues. YOKOGAWA provides detailed calibration procedures and application notes specific to the SAI143-H33, helping customers achieve optimal performance with their sensor networks.

Training programs cover analog input module calibration, noise reduction techniques, and integration with control systems like the CP461-50. Extended warranty options and preventive maintenance services are offered, including annual calibration checks to ensure the module maintains its high accuracy over time, supporting reliable and precise industrial process control.