Description

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　　Other names for 3BHT300026R1:

Analog Input Module 3BHT300026R1

3BHT300026R1 Processor Module

3BHT300026R1 Communication Module

　　I. Basic Product Information

The ABB 3BHT300026R1 is a 32-channel digital input module specifically designed by ABB for the AC800M series and Symphony Plus DCS distributed control systems. This module is mainly used for the acquisition and monitoring of switch signals, dry contact signals, and active level signals in industrial automation fields, and is widely used in process control systems in industries such as power, petrochemical, water treatment, metallurgy, and manufacturing. II. Detailed Technical Parameters

Number of Input Channels: This module is equipped with 32 digital input channels, capable of simultaneously receiving 32 switch signals, meeting the needs of acquiring large volumes of switch signals.

Input Signal Type: Supports both dry contact signals (passive contacts) and active signals (18V to 30V DC voltage signals), offering strong field adaptability.

Input Current: The input current of each channel is typically less than 8 mA, resulting in low power consumption.

Power Supply Voltage: The module operates at 24V DC, powered by the system bus.

Isolation Method: The 32 channels are not individually isolated, but are isolated in channel groups. The inter-group isolation voltage is typically 500V DC, effectively preventing common-mode interference and ground loop interference.

Signal Filtering:Each channel supports programmable input filtering time and input delay time settings, allowing users to flexibly adjust according to signal jitter in the field, avoiding false triggering.

Status Indication: Each channel is equipped with an LED indicator light. The indicator light illuminates when a signal is input to the channel, facilitating on-site debugging and troubleshooting.

　　III. Environmental and Physical Parameters

Operating Temperature Range: -25°C to +70°C, suitable for most industrial environments.

Storage Temperature Range: -40°C to +85°C.

Protection Rating: IP20, suitable for indoor control cabinet installation.

Module Dimensions: Approximately 45 mm wide, 186 mm high, and 120 mm deep.

Module Weight: Approximately 0.25 kg, lightweight.

Certifications: CE, UL, and RoHS certified.

　　IV. Channel Isolation and Electrical Characteristics

The 32 channels of the 3BHT300026R1 module are electrically divided into several groups. Electrical isolation is achieved between groups, typically at 500V DC. Channels within the same group are not isolated from each other. This design effectively reduces module costs while ensuring safety. The module supports channel-level programmable filter time and signal delay settings, allowing users to flexibly adjust according to actual site conditions, effectively filtering out interference signals and improving the reliability and accuracy of signal acquisition.

　　V. Indication and Diagnostic Functions

Each input channel is equipped with an independent LED status indicator. The indicator lights up when there is a signal input and turns off when there is no signal, allowing field engineers to quickly determine the operating status of each channel. The module supports online diagnostics and status monitoring via ABB’s control system software, and can also be configured and read from the serial interface, greatly facilitating system debugging and daily maintenance.

　　VI. Communication and System Integration

This module communicates with the main controller via the ABB AC800M system’s horizontal bus, supporting communication protocols such as Modbus. The module can be easily integrated into ABB Symphony Plus and AC800M DCS systems, seamlessly cooperating with other ABB input/output modules, controllers, operator stations, and other equipment to form a complete industrial automation control solution.

　　VII. System Compatibility and Expansion

This module is specifically designed for the ABB AC800M (Symphony Plus) DCS control system, communicating with the controller via the system’s horizontal bus (Modbus protocol). The module supports online hot-swapping, ensuring uninterrupted system operation during maintenance. Furthermore, the system can perform online programming and status monitoring of the module via a serial interface, facilitating remote diagnostics and parameter modification by engineers.

　　VIII. Comparison with Similar Modules (Text Description)

In the ABB AC800M system, the following digital input modules are in the same series as the 3BHT300026R1: DI621 (3BHT300012R1) is a 16-channel digital input module, also employing inter-channel isolation. DI635 (3BHT300015R1) is a 16-channel digital input module, but with complete isolation between each channel, offering stronger anti-interference capabilities. DI810 is a 16-channel digital input module supporting channel isolation. DI820 is an 8-channel digital input module, also supporting channel isolation. The biggest advantage of the 3BHT300026R1 lies in its high-density 32-channel design, offering a significant cost-performance advantage in applications requiring a large number of switching inputs.

It should be noted that ABB also offers a module in its robot series called DSQC651, but this is a comprehensive module with 8 digital inputs, 8 digital outputs, and 2 analog outputs, completely different from the 3BHT300026R1. Please do not confuse them.

　　IX. Typical Application Scenarios

First, in manufacturing, it is used to collect start/stop signals, alarm signals, and operating status signals from various equipment on the production line, enabling real-time monitoring of the production process.

Second, in the petrochemical industry, it is used to collect various safety interlock signals such as pressure switches, temperature switches, and level switches to ensure process safety.

Third, in the water treatment and water supply industry, it is used to collect signals such as pump operating status, valve switch positions, and water level alarms.

Fourth, in power systems, it is used to collect switch position signals and protection action signals in substation automation systems.

　　X. Summary

The ABB 3BHT300026R1 is a reliable, high-channel-density, and flexible 32-channel digital input module. With its inter-group isolation design, programmable filtering, hot-swappable support, and comprehensive diagnostic functions, it is an ideal choice for large-scale switching signal acquisition in ABB AC800M and Symphony Plus systems, and is one of the most trusted core products in the field of industrial automation control.

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