High-Density Analog Input Acquisition for Modicon Controllers
The AS-BADU-257C analog input module provides eight differential input channels for precise signal acquisition. This module accepts multiple analog signal types, including 4-20 mA current and ±10 V DC voltage. It belongs to the Schneider A120 product line and serves as a versatile I/O solution. The module features a user-configurable switch for selecting either voltage or current input modes.
Resolution, Accuracy, and Conversion Performance
The AS-BADU-257C delivers 12-bit resolution for each input channel with exceptional accuracy specifications. It achieves 0.05% accuracy for voltage inputs and 0.1% accuracy for current inputs. The module uses a successive approximation converter and requires 27 ms for a complete scan cycle. An integrated digital filter processes 50 and 60 Hz frequencies, effectively reducing electrical noise interference.
Physical Characteristics and Environmental Specifications
This compact module measures 9.5 cm in depth and 16.3 cm in height with a DIN rail mounting design. It operates reliably from 0°C to 60°C and stores safely from -40°C to +85°C. The module also tolerates 5% to 95% relative humidity without condensation, ensuring stable performance. It carries CE, UL, and CSA certifications for international safety compliance.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Line | A120 |
| Model | AS-BADU-257C |
| Module Type | Analog Input Module |
| Number of Inputs | 8 differential, isolated (1 group) |
| Input Type | Configurable: 4-20 mA or ±10 V DC |
| Resolution | 12 bits |
| Accuracy (Voltage) | 0.05% of full scale |
| Accuracy (Current) | 0.1% of full scale |
| Input Impedance | ≥ 20 MΩ (voltage), 250Ω (current) |
| Conversion Type | Successive approximation |
| Scan Time | 27 ms |
| Digital Filter | 50/60 Hz rejection |
| Channel Isolation | 500 V DC from ground |
| Power Dissipation | ≤ 4 W |
| Dimensions (D x H) | 9.5 x 16.3 cm |
| Mounting | DIN rail |
| Operating Temperature | 0°C to 60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5 to 95% (non-condensing) |
| Altitude | ≤ 2000 m |
| Certifications | CE, UL, CSA |
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 110 × 55 × 90 mm |
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