Schneider AEG AS-BADU-214
The AS-BADU-214 is an analog input module launched by Schneider Electric (formerly AEG), specially designed for Modicon PLC series (e.g., M340, Quantum). It achieves high-speed and reliable communication with PLC master stations via backplane insertion, ideal for scenarios like process control, monitoring and data acquisition.
Key Technical Specifications
- Number of channels: 8 independent analog inputs
- Input type: 0-10 V DC, ±10 V DC (voltage); 0-20 mA DC (current, optional)
- Resolution: 12-bit (corresponding to 0-4095 counts)
- Sampling rate: Up to 1 kS/s per channel
- Input impedance: ≥10 MΩ (voltage) / ≥250 Ω (current)
- Power supply: 24 V DC (backplane powered)
- Operating temperature: 0 °C – +55 °C (industrial grade)
- Protection class: IP20 (for indoor cabinets)
- Communication protocol: Compliant with Modicon PLC backplane bus protocol (Ethernet/IP, Modbus TCP optional)
Product Features
- High precision: 12-bit resolution combined with low-noise front-end enables accurate capture of process signals
- Multiple input ranges: Optional voltage or current input to meet requirements of different on-site sensors
- Modular design: Plug-and-play with hot-swappable support, facilitating quick on-site replacement or capacity expansion
- Diagnostic function: Built-in alarm for channel short circuit, open circuit, overvoltage/undervoltage to simplify fault location
- Strong compatibility: Compatible with all Schneider Modicon PLC series and supports standard backplane slots
Structure & Components
- Backplane connector: Provides 24 V DC, ground wire and data bus
- Analog input card: Internally integrates 8-channel analog front-end circuits, A/D converters, buffer and filtering units
- Diagnostic indicator lights: Each channel is equipped with LED indicator to display channel status (normal/fault)
- Enclosure: Metal housing compliant with IEC 60529 IP20 protection standard
Typical Application Fields
- Process industry: Signal acquisition of temperature, pressure, flow rate in continuous production processes (chemical, petroleum, pharmaceutical, etc.)
- Energy management: Current and voltage monitoring in power plants and distribution networks
- Building automation: Sensor connection for HVAC systems
- Laboratory & R&D: Test platforms requiring high-precision analog signal acquisition
Installation & Maintenance Guidelines
Installation
Insert the module into the corresponding empty slot of the PLC backplane, ensure slot alignment and press gently until the buckle locks. Connect 24 V DC power supply and ground wire, then check if the backplane indicator works normally.
Wiring
Wire according to the selected input type (voltage or current); shunt resistors or current loops shall be installed for current input. Keep terminals clean and avoid loose connections.
Configuration
Declare the module model in PLC programming software (e.g., Unity Pro / EcoStruxure Control Expert), and set the range, filtering time and alarm threshold for each channel.
Diagnosis
Utilize the PLC’s built-in module diagnostic function or check channel indicator lights via HMI, and replace faulty sensors/modules with short circuit/open circuit in time.
Maintenance
Regularly inspect the module backplane contact surface, channel indicators and supply voltage; clean the module during shutdown to prevent dust from entering the slot.

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