Solutions | Centralized and Distributed Analog IO Modules to Meet Signal Acquisition Needs in Different Scenarios

Introduction

In modern industrial automation, the acquisition and processing of analog signals are key steps to achieving precise control in control systems. Based on different requirements for signal acquisition, this article discusses two analog input solutions: a 32-channel 4-20mA input IP20 module (CHPN-32AI-0001) and an 8-channel analog input M12 IO-Link substation (SIOL-M12-8AI). A comparison of their features and application scenarios will help users choose the right solution.

Solution 1: 32-Channel AI Input IP20 Module

Key Features

• High-Density Analog Acquisition The CHPN-32AI-0001 module supports 32-channel 4-20mA inputs, meeting high-density signal acquisition requirements. The module provides two input modes (4-20mA or 0-20mA), making it compatible with various industrial sensors.


• Modularity and Reliability Designed with an IP20 protection rating, this module is suitable for installation inside control cabinets and operates in environments with temperatures ranging from 0-55°C. Equipped with a 12-bit high-resolution ADC, it can divide analog signals into 4,096 discrete points, ensuring reliable signal acquisition.


• Communication and Diagnostic Capabilities The module integrates easily with PLC systems via an industrial Ethernet (100Base-TX) communication interface. Its multifunctional indicator lights enable real-time diagnostics for efficient fault location and troubleshooting.


• Simplified Wiring Supporting 32 centralized wiring channels, this module simplifies the internal connection structure of control cabinets, particularly suited for centralized acquisition scenarios.

Suitable Scenarios

• Large-Scale Factory Process Control In industries like petrochemical and energy, it facilitates centralized acquisition of sensor data such as temperature, pressure, and liquid levels to build reliable control systems.


• Production Line Signal Monitoring Useful in complex assembly lines and testing systems, allowing for centralized management of numerous signals.


• Equipment Upgrades and Expansions Quickly increases signal input capacity while minimizing system retrofitting complexity.

Solution 2: 8-Channel AI Input IO-Link Substation

Key Features

• Distributed Design and Flexible Placement The SIOL-M12-8AI substation uses M12 interfaces, supporting 8 analog inputs (4-20mA/0-20mA). It connects to the host system via the IO-Link protocol, enabling efficient distributed signal acquisition.


• Industrial-Grade Protection With an IP67 protection rating, this module withstands harsh industrial environments such as humidity, dust, or vibration. It operates in temperatures ranging from -20°C to 55°C.


• Efficient Communication and Remote Diagnostics Compliant with IO-Link v1.1 standards, it supports remote device parameter adjustments, status monitoring, and fault diagnostics.


• Simplified Wiring and Installation Designed with standard M12 connectors, the substation supports plug-and-play functionality, reducing signal wiring workload.

Suitable Scenarios

• Distributed Equipment Acquisition Ideal for monitoring devices at the ends of production lines, reducing interference and costs from long-distance signal wiring.


• Outdoor or Harsh Environments Its protective design ensures stable long-term operation in water treatment, mining, and other challenging environments.


• Smart Factory Architectures Integrates into smart factory networks via IO-Link protocols, offering a flexible edge data acquisition solution.

Comparison of Both Solutions

Recommendations for Choosing a Solution

• Centralized Acquisition Needs For large-scale analog signal acquisition with centralized points, the 32-channel 4-20mA IP20 module is recommended.


• Distributed Acquisition Needs For scenarios with dispersed collection points, complex environments, or distributed installation, the 8-channel M12 IO-Link substation is the ideal choice.


• Mixed Application Scenarios Combine both solutions for complex systems to achieve optimal performance.

Conclusion

The 32-channel 4-20mA IP20 module and the 8-channel analog input M12 IO-Link substation offer distinct advantages in centralized and distributed acquisition scenarios. By combining these solutions, users can enhance automation system flexibility and reliability while meeting Industry 4.0 intelligent management needs.