The ABB AI820 is a 4-channel bipolar analog input module for S800 I/O systems. It features 14-bit resolution, supports both voltage and current signals, and provides 30V DC overvoltage protection for reliable industrial data acquisition.
The ABB AI820 functions as a high-precision acquisition component for the AC 800M and Advant 800xA control systems. This module provides four bipolar differential channels for measuring both current and voltage signals. It excels in complex industrial environments requiring accurate data from various field sensors. Consequently, plant operators gain better visibility into process variables through its reliable 14-bit resolution.
This hardware specifically supports high-integrity operations by isolating input channels from the ModuleBus. It handles a wide variety of signal ranges including standard 4-20 mA and +/- 10 V DC. Furthermore, the Swedish-engineered components ensure a long operational life in continuous processing facilities.
The AI820 incorporates robust hardware protection to safeguard against wiring errors. The current input shunt resistors can withstand accidental connections up to 30 V DC. Additionally, the module facilitates power distribution to external two-wire transmitters. This design eliminates the need for separate field power terminals in many applications.
The module also pass-through HART communication signals for smart device management. This allows maintenance teams to access advanced diagnostics from field instruments remotely. Moreover, the input stages derive power directly from the 24 V ModuleBus supply. This integration simplifies the overall cabinet power architecture and reduces internal heat generation.
Engineers value the AI820 for its stability in electrically noisy industrial settings. The differential input design effectively rejects common-mode interference during signal transmission. Therefore, the module maintains high measurement accuracy even over long cable runs. The compact form factor allows for high-density installation within standard S800 I/O racks.
In summary, the ABB AI820 represents a flexible solution for diverse analog measurement needs. Its ability to switch between voltage and current modes on a per-channel basis offers great versatility. By installing this module, facilities ensure consistent and protected data flow for their critical automation loops.
| Specification | Details |
| Brand | ABB |
| Model | AI820 |
| Product Type | Bipolar Analog Input Module |
| Input Channels | 4 Differential Channels |
| Resolution | 14 bits plus sign |
| Voltage Ranges | ±10 V, 0..10 V, 2..10 V, ±5 V, 0..5 V, 1..5 V |
| Current Ranges | ±20 mA, 0..20 mA, 4..20 mA |
| Input Impedance | 250 Ω (Current) / >1 MΩ (Voltage) |
| Isolation | Group isolated from ModuleBus |
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