AO820 ABB Simulation output module

Description

AO820 ABB Simulation output module

Product Dimensions：

Product Description

The ABB AO820 is a high-performance Analog Output Module belonging to the S800 I/O family. It is designed to interface with process controllers via the ModuleBus. The AO820 provides 4 bipolar analog output channels, making it highly versatile for controlling actuators, valves, and motor drives that require varying voltage or current signals.

Product Parameters

Key Product Advantages

• High Versatility: Supports both voltage and current outputs on the same module, allowing you to standardize on one part number for different field device types.

• Bipolar Capability: The ability to output negative voltage (-10V to +10V) is ideal for specialized applications like hydraulic positioning or bidirectional motor control.

• Hot-Swappable: Supports “Hot Swap” functionality (configuration dependent), allowing the module to be replaced while the rest of the S800 I/O station remains powered and operational.

• Compact Design: Part of the S800 system, which is known for its high-density footprint, saving significant space in control cabinets.

• Robust Diagnostics: Includes internal self-supervision to monitor the health of the D/A converters and internal power rails.

Critical Usage Notes & Precautions

1. Termination Unit (MTU): The AO820 must be used with a compatible Module Termination Unit (such as the TU810, TU812, or TU814). The MTU determines the wiring method and provides the physical connection to the field.

2. External Power: The module requires an external 24 V DC supply to drive the output loops. Failure to provide stable power will result in incorrect output values or “Channel Fault” status.

3. Group Isolation: Note that the channels are isolated as a group, not individually from each other. Ensure that field devices connected to the same module do not have conflicting ground potentials.

4. Calibration: While factory-calibrated, it is good practice to verify the zero and span settings during commissioning to account for long cable runs and loop impedance.

Product Applications

The AO820 is a staple in the ABB Ability™ System 800xA and AC800M environments:

• Process Control: Driving control valves (I/P converters) to maintain pressure, flow, or temperature in chemical and oil & gas plants.

• Speed Regulation: Providing setpoint signals to Variable Frequency Drives (VFDs) for pump and fan control.

• Power Generation: Controlling actuator positions for steam valves or fuel intake systems.

• Paper & Pulp: Managing tension and speed setpoints in high-precision winding machines.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

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