ABB AI835A Analog Input Module

ABB AI835A Analog Input Module

Product Overview

The ABB AI835A analogue input module provides a high performance solution for thermocouple/mV measurements. It integrates eight differential input channels, each of which can be independently configured to meet different measurement requirements. The module is suitable for a variety of industrial automation and process control applications, such as temperature monitoring, environmental monitoring, and power system protection.

Main features

8 Differential Input Channels: The AI835A provides 8 independent differential input channels, each of which can be configured for thermocouple or mV measurement. This provides users with flexible configuration options to suit different measurement needs.

High-precision measurements: The module features a 15-bit resolution analogue-to-digital converter (A/D), which ensures high-precision measurement results. It also supports measurements with multiple thermocouple types (e.g., B, C, D, E, J, K, L, N, R, S, T, and U), which further improves measurement accuracy and reliability.

Cold End Compensation: One of the channels (channel 8) can be configured for ‘cold end’ (ambient) temperature measurement and thus be used as a CJ (cold end) channel for the other channels. This provides the user with a convenient cold-end compensation function to eliminate the effect of ambient temperature on measurement results.

Disconnect Monitoring Function: The AI835A also features an input disconnect monitoring function that monitors the status of the input line in real time. Once a broken line or open circuit fault is detected, the module will send out an alarm signal so that the user can take timely measures to deal with it.

Easy to Configure and Use: The module provides a friendly user interface and configuration software, which is convenient for users to configure and use the module. At the same time, it also supports a variety of communication protocols (such as MODBUS RTU, etc.), which is convenient for data exchange and integration with other devices.

Application Areas

ABB AI835A analogue input module is widely used in various industrial automation and process control applications, such as:

Temperature monitoring: In environments where precise temperature measurement is required, such as chemical, metallurgical, and power industries, AI835A can provide accurate and reliable temperature measurement results.

Environmental monitoring: In environmental monitoring systems, AI835A can be used to measure air temperature, humidity and other parameters, providing powerful data support for environmental protection and governance.

Power system protection: In the power system, AI835A can be used to monitor the changes of current, voltage and other parameters, to detect and deal with potential faults and abnormalities in a timely manner, to ensure the stable operation of the power system.

Technical specifications

Signal specification: -30mV to +75mV linear or TC types B, C, D, E, J, K, L, N, R, S, T and U.

Resolution: 15 bits (A/D).

Input Impedance: 290kΩ for voltage input (may vary by model and configuration).

Communication protocol: Supports protocols such as MODBUS RTU (specifics may vary by model and configuration).

Operating temperature: usually within a certain range (specific may vary depending on the model and configuration), to meet the needs of most industrial environments.

Precautions

When installing and using the ABB AI835A Analogue Input Module, make sure that you follow the product instructions and safety specifications.

Perform regular maintenance and inspections to ensure long-term stable operation of the module.

When encountering problems, contact ABB's after-sales service team or professional technical support personnel.

The IO module has the following main functions

Input Function

The IO module can receive input signals sent by external devices and convert them into digital or analogue signals for use by the computer system or control system. These input signals can come from a variety of sensors, such as temperature sensors, pressure sensors, photosensitive sensors and so on. By receiving and parsing these input signals, the system can monitor and control the external environment in real time.

Output Functions

The IO module is capable of converting the output signals generated by a computer system or control system into the form required by an external device. These output signals are typically used to control actuators such as motors, valves, lights, etc. By sending appropriate output signals to external devices, the system enables control and operation of the external environment.

Data Acquisition and Processing

The IO module is capable of acquiring data from external devices and transferring it to a computer system or control system for further processing. This enables the system to acquire environmental data, status information and user inputs in real time and make appropriate decisions or perform specific tasks based on these data.

Communication Interfaces

IO modules are usually equipped with different types of communication interfaces, such as serial interfaces (RS232, RS485), Ethernet interfaces, CAN bus interfaces, and so on. These interfaces enable IO modules to exchange data and communicate efficiently with computer systems or other external devices.