YOKOGAWA AAI835-H50

Description

1. Detailed parameter table

YOKOGAWA AAI835-H50

2. Product introduction

The YOKOGAWA AAI835 – H50 is a high – performance analog I/O module designed to meet the complex requirements of industrial automation systems. As part of YOKOGAWA’s advanced product lineup, it serves as a crucial link between field devices and control systems. This module is engineered to convert analog signals from the field, such as those from sensors, into digital data that can be processed by the Field Control Station (FCS). Conversely, it can also transform digital data from the FCS into analog signals for output to actuators.

With its 4 – channel input and 4 – channel output configuration, the AAI835 – H50 offers flexibility in handling multiple analog signals simultaneously. The “H” in its model indicates its HART communication capability, allowing it to interface with HART – enabled devices. This feature greatly enhances its functionality in modern industrial setups where intelligent device communication is essential. Overall, the YOKOGAWA AAI835 – H50 plays a pivotal role in ensuring seamless data flow and control in industrial automation processes, contributing to enhanced efficiency and reliability.

3. Core advantages and technical highlights

High – Precision Signal Conversion

The YOKOGAWA AAI835 – H50 excels in signal conversion accuracy. Its input accuracy of ±16μA and output accuracy of ±48μA ensure that the signals transmitted between the field and the control system are highly precise. This level of accuracy is vital in industries like pharmaceuticals and electronics manufacturing, where even the slightest deviation in process parameters can lead to significant quality issues. For example, in pharmaceutical production, accurate control of temperature and pressure, which are often measured and transmitted through analog signals, is crucial for maintaining the quality and consistency of drug products. The AAI835 – H50‘s high – precision signal conversion helps in achieving this, reducing the risk of product defects.

HART Communication Capability

Equipped with HART communication functionality, the AAI835 – H50 stands out in the market. It can connect directly to HART devices using its built – in HART modem. This enables features such as remote device configuration, calibration, and diagnostic data retrieval. In large – scale industrial plants, where numerous HART – enabled sensors and actuators are deployed, the AAI835 – H50 can manage up to 16 HART devices per module, with support for 32 HART variables. This not only simplifies the communication infrastructure but also allows for more comprehensive monitoring and control of the industrial process. For instance, in a petrochemical refinery, HART – enabled pressure and temperature sensors can be easily integrated with the control system via the AAI835 – H50, providing real – time data and diagnostic information for better process optimization.

Channel – to – Channel Isolation

Featuring 500V AC isolation between input/output channels and with the system, the AAI835 – H50 offers excellent protection against electrical interference. This isolation is crucial in industrial environments where high – voltage equipment and electromagnetic fields are common. In a factory filled with large motors and power distribution systems, the isolation in the AAI835 – H50 ensures that signals in one channel are not affected by electrical noise or faults in other channels. This results in stable and reliable operation, reducing the likelihood of measurement errors and system malfunctions, and ultimately enhancing the overall performance of the industrial control system.

YOKOGAWA AAI835-H50

4. Typical application scenarios

In the manufacturing industry, the YOKOGAWA AAI835 – H50 is widely used for process control. In a food and beverage production plant, it can be used to control the flow rate of ingredients, measure the temperature of cooking and packaging processes, and adjust the pressure in filling machines. The module’s high – precision analog I/O capabilities ensure that the production process adheres to strict quality standards. For example, accurate control of ingredient flow rates is essential for maintaining product consistency in food manufacturing.

In the power generation sector, the AAI835 – H50 plays a significant role in monitoring and controlling power – related parameters. In a thermal power plant, it can measure the temperature and pressure of steam, the flow rate of fuel, and control the output of generators. By accurately converting analog signals from sensors in the plant to digital data for the control system, it helps in optimizing power generation efficiency and ensuring the safe operation of the plant. For instance, precise control of steam pressure and temperature is crucial for maximizing the efficiency of the turbine – generator system.

For environmental monitoring applications, such as in water treatment plants, the YOKOGAWA AAI835 – H50 can be used to measure and control parameters like water flow, pH levels, and chemical dosages. In a large – scale water treatment facility, accurate control of these parameters is essential for ensuring clean and safe water supply. The module’s ability to handle multiple analog signals simultaneously and its high – accuracy signal conversion make it an ideal choice for such applications, enabling effective monitoring and control of the water treatment process.

5. Related model recommendations

• AAI141 – H50/K4A00: A 4 – channel analog input module from YOKOGAWA. It is suitable for applications with fewer input signal requirements compared to the 8 – channel AAI835 – H50. It shares the HART communication feature and similar high – quality build, making it a cost – effective choice for smaller – scale projects.
• AAI143 – S50: An 8 – channel analog input module. While it has a different series designation, it is also an analog input – focused module like the AAI835 – H50. It may offer different input type combinations or other specific features, providing users with an alternative for applications that require only analog input functionality.
• AAO141 – H50/K4A00: An analog output module. It can be paired with the AAI835 – H50to form a more comprehensive analog I/O solution. If a project requires both analog input and output capabilities, using these two modules together can meet the need for both signal collection and control output.
• AAO835 – H50(hypothetical, for illustrative purposes): If it exists, it would likely be an 8 – channel analog output module similar in form factor and HART – compatibility to the AAI835 – H50. It could be used in scenarios where a large number of analog output signals need to be controlled, complementing the input – heavy AAI835 – H50 in complex industrial control systems.
• EJA Series Transmitters: These are pressure and temperature transmitters from YOKOGAWA. They can be sources of analog signals that the AAI835 – H50can receive and process. For example, EJA transmitters measuring pressure in a pipeline can send 4 – 20mA signals to the AAI835 – H50 for further processing in the control system.

6. Installation, commissioning and maintenance instructions

Installation preparation

Before installing the YOKOGAWA AAI835 – H50, ensure that the installation environment meets the module’s requirements. The area should be free from excessive moisture, dust, and strong electromagnetic fields. Prepare the necessary tools, such as screwdrivers and wire strippers, for mounting the module and connecting the cables. It is crucial to double – check the electrical specifications of the power source to ensure it matches the module’s requirements. When handling the module, always wear anti – static wristbands to prevent electrostatic discharge that could potentially damage the sensitive electronic components.

Maintenance suggestions

For daily maintenance, regularly inspect the module for any signs of physical damage, such as cracks or loose connections. Clean the module’s surface gently to remove dust that could affect its performance over time. In case of a malfunction, use the diagnostic tools provided by YOKOGAWA to identify the problem. If a component needs replacement, ensure that the replacement part is of the same specification as the original. For example, if the HART modem fails, replace it with an identical YOKOGAWA – approved part. Periodically check the calibration of the module to maintain its high – accuracy signal conversion capabilities. By following these maintenance suggestions, the AAI835 – H50 can maintain its optimal performance over its lifespan.

7. Service and guarantee commitment

YOKOGAWA stands firmly behind the quality of the YOKOGAWA AAI835 – H50. The module comes with a comprehensive quality assurance program. During the manufacturing process, it undergoes rigorous testing to meet international industry standards. In the unlikely event of a defect, YOKOGAWA offers an industry – competitive warranty period. If any issues arise within the warranty, YOKOGAWA will provide free repair or replacement services.

Moreover, YOKOGAWA’s global technical support team is available to assist customers. Whether it’s installation guidance, troubleshooting, or advice on optimizing the module’s performance, the team can be reached easily. The company also provides regular software updates to enhance the module’s functionality and compatibility. This commitment to service reflects YOKOGAWA’s confidence in the AAI835 – H50 and its dedication to ensuring customer satisfaction and long – term success in industrial automation applications.