Compact 8-Channel Input Solution for Modicon Controllers
The AS-B821-108 discrete input module provides eight independent channels for digital signal acquisition. This module belongs to the Schneider A120 product line and supports a wide range of field devices. It accepts input voltages from 20 to 30 V DC, with 24 V DC representing the true high state. This module features LED indicators on the front panel for each channel’s status.
Input Characteristics and Response Performance
The AS-B821-108 module delivers reliable performance with a 6 ms nominal response time. It draws 15 mA maximum current consumption per input at 24 V DC. The module also utilizes optoelectrical isolation to protect against electrical noise interference. This design protects signals from electrical noise and ensures accurate data acquisition.
Physical Dimensions and Environmental Specifications
This module measures 10.2 cm width, 25.4 cm depth, and 5.1 cm height. It weighs approximately 0.28 kg and fits standard panel mount installations. The module operates reliably across a wide temperature range from -25°C to +60°C. It also stores safely from -40°C to +85°C without damage.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Schneider Electric |
| Product Line | A120 |
| Model | AS-B821-108 |
| Module Type | Discrete Input Module |
| Number of Inputs | 8 |
| Input Type | Discrete |
| Input Voltage Range | 20 to 30 V DC (24 V DC nominal) |
| Input Current | 15 mA maximum |
| Response Time | 6 ms nominal |
| Isolation Type | Optoelectrical |
| Power Supply | 24 V DC |
| Power Dissipation | 3 W maximum |
| Dimensions (W x D x H) | 10.2 x 25.4 x 5.1 cm |
| Weight | 0.28 kg |
| Operating Temperature | -25°C to +60°C |
| Storage Temperature | -40°C to +85°C |
| Relative Humidity | 5 to 95% (non-condensing) |
| Indicators | 8 LED for channel status |
| Mounting | DIN rail or panel mount |
| Certifications | CE, UL, CSA |
Details
| Weight | 0.91 kg |
|---|---|
| Dimensions | 110 × 55 × 90 mm |
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