•• Core Function: Provides 4 channels of analog output signal conditioning for controlling field devices such as control valves, variable speed drives, and positioning systems.
AO2040: Product OverviewThe AO2040 is a 4-channel analog output module within ABB’s S800 I/O family, designed for precise control of analog field devices in process automation systems. This module serves as the interface between the control system and field actuators, converting digital control signals from the controller into precise analog current outputs. Installed in an S800 I/O station, its primary function is to translate control commands into 4-20mA signals that operate final control elements such as control valves, electric actuators, variable frequency drives, and other analog-controlled devices.The module provides channel-to-channel and channel-to-system isolation, preventing ground loops and ensuring that a fault on one output does not affect the others. Each channel can be individually configured for different operating modes and includes comprehensive diagnostics. The module supports HART (Highway Addressable Remote Transducer) communication, enabling digital communication with smart field devices superimposed on the 4-20mA analog signal. This allows for device configuration, calibration, and diagnostics without interrupting the control signal.
ABB AO2040
AO2040: Technical Specifications
•• Model Number: AO2040
•• Manufacturer: ABB
•• Product Type: 4-Channel Analog Output Module
•• Output Channels: 4 channels, configurable
•• Output Signal: 4-20mA (with HART communication support)
•• Resolution: 16-bit
•• Accuracy: ±0.05% of span
•• Update Time: 10 ms per channel
•• HART Support: Integrated HART modem per channel
•• Isolation: Channel-to-channel and channel-to-system isolation, 500V AC
•• Load Capacity: 0-750Ω per channel
•• Power Supply: 24V DC via S800 I/O baseplate
•• Power Consumption: Typically 1.8W
•• Operating Temperature: -25°C to +70°C
•• Connection: Via Field Termination Assembly (FTA)
•• Compatible Systems: ABB AC 800M, Symphony DCS, System 800xA
ABB AO2040
Core Features & Customer ValueThe module’s high resolution (16-bit) and accuracy (±0.05%) ensure precise control of field devices, enabling fine adjustments to process variables. For control engineers, this translates to improved process stability and product quality, particularly in applications requiring tight control such as reactor temperature control or flow regulation. The fast update time (10 ms per channel) allows for responsive control action during process upsets.The integrated HART capability provides significant operational value by enabling asset management functionalities. Maintenance personnel can communicate with HART-enabled field devices for configuration, calibration verification, and diagnostics without requiring separate communication equipment. The channel-to-channel isolation prevents fault propagation and ensures that a failure in one channel does not affect the others, enhancing overall system reliability.Typical ApplicationsIn chemical processing plants, the AO2040 controls control valves for precise flow regulation of raw materials and finished products. The HART communication enables remote calibration and monitoring of valve positioners, reducing maintenance time and improving valve performance.In water treatment facilities, the module adjusts the speed of variable frequency drives controlling pump motors. The precise 4-20mA output ensures accurate flow control while the HART communication provides access to drive parameters and diagnostics.
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Full 12-month warranty on all components
