ABB AO820 4-channel analog output module

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ABB AO820 4-channel analog output module

1. Channel Characteristics

• Features 4 bipolar analog output channels, each of which can be independently configured for either current output or voltage output.
  • Current output ranges: -20 mA to +20 mA, 0 mA to 20 mA, 4 mA to 20 mA.
  • Voltage output ranges: -10 V to +10 V, 0 V to 10 V, 2 V to 10 V.

2. Electrical Isolation

• Each channel has independent electrical isolation, which effectively enhances safety, prevents electrical noise interference, and improves the module’s anti-interference capability and stability.

3. Resolution

• Boasts a 12-bit resolution, delivering relatively precise analog output to ensure the accuracy of control processes and meet the precision requirements of most industrial control scenarios.

4. Short-Circuit Protection

• Equipped with short-circuit protection. When a short circuit occurs at the output terminal, it protects the module and connected equipment from damage, further enhancing system reliability.

5. Diagnostic Functions

• To monitor communication with the A/D converter, output data is read back and verified. Meanwhile, open-circuit diagnostic information is continuously read.
• If voltage is lost, the process voltage monitoring input sends a channel error signal. This error signal can be read via the ModuleBus, allowing users to promptly understand the module’s operating status and conduct fault troubleshooting and maintenance.

6. Mechanical Characteristics

• Dimensions: 102 mm × 19 mm × 45 mm; Weight: Approximately 0.325 kg.
• Features a compact structure, facilitating installation in control cabinets with limited space. It adopts a standard DIN rail mounting method for easy integration into existing systems.

7. Application Fields

• Widely used in the industrial automation field. It converts digital signals into analog signals to control analog actuators such as valves and motors, enabling precise control of process variables (e.g., temperature, pressure). It can also be applied in various testing and measurement scenarios.

The structure and details of the product：

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