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The ABB AO845A (3BSE045584R1) is an 8-channel analog output module for the S800 I/O system, delivering 4–20 mA signals with HART® protocol support. Designed for precision control in industrial automation, it ensures high accuracy, galvanic isolation, and robust communication. Ideal for process industries, it integrates seamlessly with ABB’s 800xA and Symphony® Plus systems, providing reliable performance in demanding environments.
Product Specifications
Output Performance & Accuracy:
8 isolated analog output channels, each configurable for 4–20 mA with HART® 7 communication.
High accuracy (±0.1% of span) for precise control of valves, actuators, and process instruments.
16-bit resolution ensures fine signal adjustment and minimal drift over time.
HART® Protocol & Diagnostics:
Full HART® 7 compliance, enabling bidigital communication with smart field devices (e.g., transmitters, positioners).
Embedded HART® modem allows device configuration, calibration, and diagnostics without interrupting the analog signal.
Continuous monitoring of loop current, open-circuit detection, and load conditions for predictive maintenance.
Isolation & Protection:
Channel-to-channel and channel-to-system isolation (1500 V AC) prevents ground loops and noise interference.
Short-circuit and reverse polarity protection enhances durability in harsh industrial environments.
Wide operating temperature range (-25°C to +70°C) for reliable performance in extreme conditions.
Integration & Compatibility:
Hot-swappable design for easy maintenance without system shutdown (supports S800 I/O carrier redundancy).
Seamless integration with ABB’s 800xA, Symphony® Plus, and third-party DCS/PLC systems.
Supports FOUNDATION™ Fieldbus and PROFIBUS PA via interface modules.
Applications:
Process control in oil & gas, power generation, and chemical plants.
Smart valve control, flow regulation, and remote monitoring.
Critical automation systems requiring high reliability and HART compatibility.
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