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ABB DSAO120A 3BSE018293R1 Analog Output Board

Introduction

The ABB DSAO120A 3BSE018293R1 is an analog output module used in ABB Symphony Plus, AC 800M, and 800xA control systems. It converts digital control signals from the controller into standard analog signals (such as 0–10V or 4–20mA) to drive actuators, transmitters, or other control devices. With high accuracy, robust isolation, and strong noise immunity, it plays a key role in process automation and control applications.

Technical Specifications

• Model: DSAO120A

• Part Number: 3BSE018293R1

• Type: Analog Output Module

• Channels: 8 analog output channels

• Signal Types:

  • Voltage Output: 0–10 V DC

  • Current Output: 0/4–20 mA

• Resolution: 12 / 16 bit (system configurable)

• Isolation: Optical isolation between channels and system bus

• Load Capacity:

  • Current Output: max 600 Ω

  • Voltage Output: ≥ 2 kΩ

• Power Supply: 24 V DC

• Update Rate: < 10 ms (typical)

• Indicators: LEDs for channel and power status

• Operating Temperature: 0℃ to +55℃

• Storage Temperature: -40℃ to +70℃

• Protection Class: IP20 (cabinet installation required)

• Mounting: DIN rail or cabinet installation

• Certifications: CE, UL, RoHS

Features and Benefits

1. High-Accuracy Outputs

   • Provides reliable current/voltage signals for demanding industrial applications.

2. Isolation Protection

   • Optical isolation prevents disturbances from affecting system performance.

3. Modular Design

   • Fully compatible with ABB I/O modules for flexible system expansion.

4. Status Indication

   • LED indicators for easy monitoring and diagnostics.

5. High Reliability

   • Industrial-grade design suitable for continuous operation.

6. Easy Maintenance

   • Hot-swappable design reduces downtime during replacement.

Applications

• Process Automation: Control of actuators and regulating valves in oil & gas, chemical, power, and metallurgy.

• Power Plants: Boiler and turbine valve control, excitation systems.

• Manufacturing: Equipment control and process parameter regulation.

• Water & Environmental: Pump stations, dosing systems, and valve control.

• Building Automation: Energy control and HVAC systems.

Installation & Maintenance Notes

1. Wiring: Correctly configure outputs as current or voltage per field device requirements.

2. Load Matching: Ensure load impedance is within supported range.

3. Power Supply: Stable 24 VDC is required.

4. Shielding: Use shielded cables with proper grounding to minimize interference.

5. Environment: Install in ventilated control cabinets, away from dust, humidity, or corrosive gases.

6. Calibration: Periodically verify output signals for long-term accuracy.

The structure and details of the product：

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