ABB DSDI 302 Digital Input Unit

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 1. Product Overview

The ABB DSDI 302 is an industrial-grade Digital Input Unit designed to capture discrete signals from field devices and transmit them to ABB control systems (such as AC500 PLCs or Advant systems). It features multiple input channels with isolation protection, providing high reliability and accurate digital signal acquisition.

DSDI 302 is widely used in factory process monitoring, machine status detection, and safety control applications.

2. Technical Specifications

• Model: DSDI 302

• Product Type: Digital Input Unit

• Channels: 16 channels (configurable)

• Input Signal Type: Discrete (24 VDC)

• Input Voltage: 24 VDC

• Isolation: Optical isolation for system protection

• Response Time: Typical 1–2 ms

• Input Impedance: High-impedance to prevent signal interference

• Mounting: Rack or DIN rail mounting

• Operating Temperature: –20°C to +60°C

• Storage Temperature: –40°C to +85°C

• Protection Class: IP20

• Communication Interface: Backplane / bus connection to control system

• Applicable Systems: ABB Advant, AC series PLC architectures

3. Features & Advantages

• Reliable and accurate digital signal acquisition

• Industrial-grade optical isolation for electrical safety

• Fast millisecond-level response

• Modular design for easy installation and maintenance

• Direct compatibility with ABB control system backplane or bus

• Multiple channel inputs for simultaneous device monitoring

4. Application Areas

• Factory automation and process control

• Motor and equipment status monitoring

• Packaging machinery and conveyor systems

• Power, metallurgical, chemical, and mining industries

• Water treatment and municipal infrastructure

• Automated production lines and discrete control systems

• Safety and alarm signal acquisition

5. Precautions

1. Ensure proper matching with the backplane or bus before installation.

2. Disconnect power before wiring digital inputs.

3. Input load must be within the module’s rated range.

4. Avoid direct exposure to high humidity or dusty environments.

5. Periodically check terminal connections for looseness.

6. Avoid connecting multiple high-interference signals to a single module.

The structure and details of the product：

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