Description
Product Description
The ABB DSAO120A 3BSE018293R1 is a high-density, digital simplex output module designed for the ABB AC 800M and System 800xA distributed control system (DCS) and high-end PLC platform. This module is engineered to provide reliable and precise control signals to final actuating elements like solenoid valves, motor starters, and indicator lamps in demanding industrial environments. As an integral part of ABB’s S800 I/O family, the ABB DSAO120A offers a compact and ruggedized solution for expanding the digital output capacity of a controller. It features a high degree of channel isolation and diagnostics, ensuring operational integrity in critical process applications.
Product Parameters
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Product Type: Digital Simplex Output Module (16-channel).
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Ordering Code / Article Number: 3BSE018293R1.
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Output Type: 24 V DC, transistor sink/source.
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Number of Channels: 16 isolated outputs.
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Output Current per Channel: Typically 0.5 A.
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Total Module Current: Limited by backplane/bus.
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Isolation: Channel-to-channel and channel-to-bus isolation for enhanced safety and noise immunity.
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Status Indication: LED per channel for output state and fault indication.
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Connection: Via front-mounted, removable terminal blocks for easy wiring.
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Mounting: Mounts on an S800 I/O station baseplate.
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Compatibility: Part of the S800 I/O family, designed for use with AC 800M controllers (e.g., PM864, PM865, UFC controllers) within System 800xA or Freelance.
Advantages and Features
The ABB DSAO120A 3BSE018293R1 module provides several key advantages. Its high channel density allows for significant space and cost savings in control cabinet design compared to using multiple lower-density modules. The comprehensive diagnostic capabilities, including channel status LEDs and system-integrated diagnostics, enable rapid troubleshooting and reduce system downtime. Built to industrial standards, it offers excellent noise immunity and robustness in harsh electrical environments. The hot-swappable design (when used in a supported redundant configuration and with proper procedures) facilitates maintenance and module replacement without shutting down the entire process. The module is fully integrated with ABB’s control engineering tools, allowing for straightforward configuration and commissioning within the Control Builder M project.
Application Cases in Various Fields
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Manufacturing & Assembly Lines: Controlling a large array of pneumatic cylinders, clamping tools, conveyor gates, and status lights in automotive or discrete part manufacturing.
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Process Industries (Chemical, Pharma): Operating numerous solenoid valves for dosing, drain, or venting functions in batch processes, and controlling pump run status indicators.
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Water & Wastewater Treatment: Actuating motorized valves for flow diversion, controlling pump sequences, and managing alarm sirens or beacon lights across a treatment plant.
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Material Handling: Controlling the solenoids for diverter arms, conveyor belt brakes, and package routing systems in distribution centers.
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Energy & Power: Managing auxiliary equipment in a power plant, such as local fan controls, lubrication system valves, and panel indication for remote equipment.
Comparison with Competing Products
Compared to standard PLC digital output modules from other manufacturers, the ABB DSAO120A is part of a tightly integrated DCS/PLC ecosystem (System 800xA/AC 800M), offering superior engineering consistency, diagnostics integration, and lifecycle management. Its channel-to-channel isolation is a premium feature often found in higher-end modules, providing better protection against ground loop issues compared to some competing grouped or non-isolated modules. When compared to other DCS vendor I/O, the S800 series, including the DSAO120A, is recognized for its rugged mechanical design and long-term availability, which is critical for process industry installations with decades-long lifespans.
Selection Suggestions and Precautions
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System Compatibility: Verify that the ABB DSAO120A 3BSE018293R1 is compatible with your specific S800 I/O baseplate (e.g., CI854, CI855) and controller firmware version.
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Load Specification: Ensure the connected load (inrush and steady-state current) per channel is within the 0.5A rating. Use external relays or contactors for higher-current loads.
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Power Supply Calculation: Accurately calculate the total 24V DC current required for all 16 activated outputs and ensure the system power supply has sufficient capacity.
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Wiring and Fusing: Follow ABB guidelines for wiring and consider using external fuses or circuit breakers on each output to protect the module from field-side short circuits.
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Heat Dissipation: Be mindful of the total power dissipation of the module in the enclosure, especially when most outputs are active simultaneously.
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