Schneider ADU 204/AS-BADU-204 Analog Input Module

Product Introduction

The Schneider ADU 204 / AS-BADU-204 Analog Input Module is a high-precision input module designed for industrial automation systems that require accurate analog signal acquisition. Engineered to interface with various sensors, this module is particularly suited for PT100 resistance temperature detectors (RTDs) and millivolt input ranges, making it ideal for temperature and low-voltage measurement applications. With 12-bit resolution and robust filtering capabilities, the ADU 204 ensures dependable data collection for process control, monitoring, and advanced automation tasks.

Technical Specifications

Applications

The ADU 204 module is widely used wherever precise analog measurement and temperature monitoring are required:

• Industrial Process Control: Accurate acquisition of temperature or millivolt signals from PT100 sensors in chemical, pharmaceutical, and food processing plants.

• Energy Management: Monitoring of thermal data in power generation and distribution facilities.

• Building Automation: Precise temperature input for HVAC and environmental control systems.

• Laboratory and R&D: Reliable measurement of low-voltage signals during product testing and research activities.

• Manufacturing Automation: Real-time monitoring of process conditions to ensure product quality and consistency.

Advantages

• High Accuracy and Resolution: 12-bit resolution ensures detailed signal capture for precise control and monitoring.

• Versatile Input Capability: Supports both RTD temperature sensing and ±500 mV voltage signals.

• Robust Isolation: Channel-to-backplane and channel-to-channel isolation improve safety and reduce electrical noise.

• Programmable Filtering: Built-in digital filtering minimizes interference for stable readings.

• Compact and Rugged Design: Fits easily into Schneider automation racks and performs reliably in industrial environments.

• User-Friendly Configuration: Software-based setup simplifies integration with existing automation systems.

FAQ

1. Which sensor types are supported by the ADU 204 module?
   It supports PT100 RTDs for temperature measurement and low-level ±500 mV voltage inputs.

2. What is the resolution of the analog inputs?
   The module provides a 12-bit resolution for precise signal acquisition.

3. How is the module configured for different input types?
   Configuration is performed through Schneider programming tools to select RTD or voltage mode per channel.

4. Is channel-to-channel isolation available?
   Yes, each analog input is isolated from other channels and from the backplane.

5. What excitation method is used for PT100 sensors?
   A stable constant current source is provided to ensure accurate RTD measurement.

6. Can filtering be adjusted to reduce noise?
   Yes, the digital filter parameters can be programmed to minimize signal interference.

7. How can channel status be monitored?
   Front-panel LEDs indicate normal operation, active input, and fault conditions.

8. Does the module require external power for sensors?
   No, it is powered entirely by the 5 V DC system backplane.

9. What is the input impedance for millivolt measurements?
   The input impedance exceeds 1 MΩ, ensuring minimal loading of the measured circuit.

10. Is it possible to calibrate the module in the field?
    Yes, field calibration can be performed using standard reference sources and Schneider configuration tools.

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FAQ

1. Which sensor types are supported by the ADU 204 module?
   It supports PT100 RTDs for temperature measurement and low-level ±500 mV voltage inputs.

2. What is the resolution of the analog inputs?
   The module provides a 12-bit resolution for precise signal acquisition.

3. How is the module configured for different input types?
   Configuration is performed through Schneider programming tools to select RTD or voltage mode per channel.

4. Is channel-to-channel isolation available?
   Yes, each analog input is isolated from other channels and from the backplane.

5. What excitation method is used for PT100 sensors?
   A stable constant current source is provided to ensure accurate RTD measurement.

6. Can filtering be adjusted to reduce noise?
   Yes, the digital filter parameters can be programmed to minimize signal interference.

7. How can channel status be monitored?
   Front-panel LEDs indicate normal operation, active input, and fault conditions.

8. Does the module require external power for sensors?
   No, it is powered entirely by the 5 V DC system backplane.

9. What is the input impedance for millivolt measurements?
   The input impedance exceeds 1 MΩ, ensuring minimal loading of the measured circuit.

10. Is it possible to calibrate the module in the field?
    Yes, field calibration can be performed using standard reference sources and Schneider configuration tools.

Related Models (Same Series/Family)

Popular Schneider Models

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