ABB IMASI23 module

ABB IMASI23 module

product overview

The ABB IMASI23 module is an analog input module designed specifically for industrial automation systems, responsible for critical data acquisition tasks in industrial control systems. It can convert analog signals from various sensors on site, such as temperature, pressure, flow rate, liquid level, and other physical quantities, into digital signals and transmit them to the control system, providing accurate data basis for precise control and decision-making of the system. It is an indispensable basic component for achieving precise control of industrial automation.

Specification parameters

（1） Channel parameters

Number of channels: Equipped with 8 analog input channels, it can simultaneously access 8 different analog signals, suitable for small and medium-sized industrial automation data acquisition scenarios, meeting diverse monitoring needs.

Signal type: Supports multiple standard analog signal inputs, including 4-20mA current signals, ± 10V voltage signals, etc. 4-20mA current signal is commonly used for long-distance signal transmission in industrial sites, with strong anti-interference ability; The ± 10V voltage signal is suitable for situations where high signal accuracy is required and the transmission distance is close.

（2） Electrical parameters

Input accuracy: With high input accuracy, usually up to ± 0.1% FS (full range), it can accurately collect analog signals, effectively reduce measurement errors, ensure the accuracy of collected data, and provide reliable data support for industrial control.

Input impedance: For current input, the input impedance is generally less than 250 Ω; For voltage input, the input impedance is greater than 10M Ω. A reasonable input impedance design can ensure that the signal is not distorted during transmission and ensure the stability of signal acquisition.

Isolation characteristics: Electrical isolation design is adopted between channels and between channels and systems, with an isolation voltage of up to 500V AC, effectively preventing signal interference and electrical faults from affecting each other, improving the reliability of module operation and system safety.

（3） Physical parameters

Size specifications: Adopting a compact design, the external dimensions are approximately [length x width x height, such as 80mm x 50mm x 40mm (depending on the actual product)], making it easy to install in control cabinets, distribution boxes and other equipment with limited space, saving installation space and improving system integration.

Installation method: Supports standard DIN rail installation, the installation process is simple and fast. Simply insert the module into the guide rail and secure it, and the installation can be completed. It can also be fixed to the installation plane with screws, making it convenient for on-site installation and later maintenance.

Environmental adaptability: The working temperature range is generally -25 ℃ to+60 ℃, and the relative humidity range is 5% -95% (without condensation). It has good resistance to vibration, impact, and electromagnetic interference, and can operate stably in harsh industrial sites such as high temperature, humidity, high dust, and complex electromagnetic environments.

Introduction

Module Description

Functional Operation

Isolated A/D Converter

Cold Junction Reference

The ASI module measures the cold junction RTDs on the termination unit of the analog input module. 

This results in an accurate reading of the ambient temperature at the field wire termination area.

Each analog input module configured for a thermocouple input requires a cold junction reference. 

Each analog input module can only have one reference which can be used by up to 16 thermocouple inputs.

Refer to Section 4 for more information

Once isolated, digitized, and buffered, the input signal is sent to the microcontroller by a digital multiplexer. 

All the inputs, including the references and cold junction input, are multi plexed as shown in Figure 2-1.

RAM (DPRAM)

I/O Expander Bus

A controller and its I/O modules form a subsystem within a Harmony control unit (HCU). 

The I/O expander bus between control and I/O subsystems must be separated.

I/O Expander Bus Interface

Termination Units