The ABB 3BSC690087R1 AO895 is a high-density analog output module designed for the S800 I/O system, specifically optimized for use in intrinsically safe applications. It features 8 channels for 4-20 mA signals and supports digital communication via the HART protocol. This module is typically used in hazardous areas to control actuators, valves, and other field devices while providing diagnostic data through HART, ensuring high availability and precision in process control environments.
Product Specifications
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Product ID: 3BSC690087R1
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ABB Type Designation: AO895
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Dimensions: 119 mm x 45 mm x 102 mm
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Weight: 0.25 kg
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Country of Origin: Estonia / Sweden
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Number of Channels: 8 Channels
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Output Signal: 4-20 mA (Current Output)
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HART Protocol: Supported (Version 5, 6, and 7)
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Isolation: Individually galvanic isolated channels from the ModuleBus
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Power Dissipation: 4.5 W (Typical)
Application Fields
The AO895 module is widely deployed in industries that require intrinsic safety (IS) and advanced diagnostics. Common application fields include oil and gas refineries, offshore platforms, chemical processing plants, and pharmaceutical manufacturing. It is ideal for controlling critical final control elements like I/P converters, control valves, and positioners where HART communication is necessary to monitor device health and configuration remotely.
Product Instructions
The AO895 module must be installed on a compatible S800 I/O Terminal Unit (such as the TU890 or TU891) which provides the necessary connection to the field and the ModuleBus. Due to its intrinsically safe design, it must be used in conjunction with appropriate IS barriers or within defined IS parameters to ensure safety in explosive atmospheres. Users should ensure that the ModuleBus address is correctly set on the baseplate before hot-swapping or inserting the module. Configuration of output ranges and HART variables is managed via the ABB 800xA control system or compatible FDT/DTM tools.
FAQ: Common Questions and Answers
Q: Does the AO895 support hot-swapping? A: Yes, like most S800 I/O modules, the AO895 supports “Hot Configuration in Run” (HCIR) and can be replaced while the system is powered, provided the terminal unit remains in place.
Q: Can I use this module for non-intrinsically safe signals? A: While technically possible, the AO895 is specifically designed and certified for intrinsically safe applications. For standard 4-20 mA signals in non-hazardous areas, the AO810 or AO815 models are generally more cost-effective alternatives.
Q: How does the HART communication benefit my operation? A: HART allows the AO895 to pass secondary variables (like valve position or internal temperature) from the field device back to the controller without additional wiring, enabling predictive maintenance and easier calibration.
For technical datasheets and availability of the ABB 3BSC690087R1 AO895, please contact our sales department.
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