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ABB AO820
ABB AO820
ABB AO820
ABB AO820
ABB AO820

ABB AO820

  • Precision and Flexibility:
    • 12-bit resolution ensures ±0.1% accuracy, reducing process variability in critical applications like pharmaceutical batch processing.
    • Configurable output ranges allow seamless integration with legacy and modern equipment (e.g., 4–20mA for valve positioning, ±10V for motor drives).
  • Reliability and Safety:
    • Galvanic isolation (500V AC) protects against electrical noise and ground loops, minimizing downtime in harsh environments (e.g., offshore platforms).
    • OSP (Output Signal Processing) maintains predefined output states during communication loss, preventing uncontrolled process changes.
  • Efficiency and Scalability:
    • Compact design (45mm width) saves cabinet space, supporting high-density I/O racks in food & beverage packaging lines.
    • Hot-swap capability enables module replacement without system shutdown, reducing maintenance time by 50% in continuous production facilities.
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Part number: ABB AO820
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Description

ABB AO820 High-Precision Analog Output Module for Industrial Automation

The AO820 is a 4-channel galvanically isolated analog output module designed by ABB for its S800 I/O platform and Ability™ System 800xA®, delivering precise control signals to actuators, valves, and drives in industrial processes. With 12-bit resolution and ±20mA/±10V output flexibility, this module ensures accurate and reliable performance in manufacturing, oil & gas, and power generation industries, supporting applications from chemical reactor control to renewable energy grid stabilization.

1. Product Overview

The AO820 serves as a critical component in distributed control systems (DCS) and PLC environments, converting digital commands into analog signals for process automation. Its individually isolated channels (500V AC isolation) protect against ground loops and voltage surges, while OSP (Output Signal Processing) ensures predefined output states during communication failures. The module supports current (4–20mA, ±20mA) and voltage (0–10V, ±10V) outputs, with user-configurable ranges via software, making it suitable for diverse industrial requirements.

2. Technical Specifications

Parameter Specification
Output Channels 4 (individually configurable)
Signal Types ±20mA, 0(4)–20mA (current) or ±10V, 0–10V (voltage)
Resolution 12 bits (±0.1% accuracy)
Load Impedance ≤550Ω (current) / ≥5kΩ (voltage)
Isolation 500V AC (channel-to-channel and channel-to-system)
Response Time <0.7ms (full-scale step)
Operating Temperature 0°C to +55°C (derate >40°C)
Compatibility ABB S800 I/O, 800xA, and third-party PLCs
Dimensions 45mm (W) × 102mm (D) × 119mm (H)
ABB AO820

ABB AO820

3. Key Advantages

  • Precision and Flexibility:
    • 12-bit resolution ensures ±0.1% accuracy, reducing process variability in critical applications like pharmaceutical batch processing.
    • Configurable output ranges allow seamless integration with legacy and modern equipment (e.g., 4–20mA for valve positioning, ±10V for motor drives).
  • Reliability and Safety:
    • Galvanic isolation (500V AC) protects against electrical noise and ground loops, minimizing downtime in harsh environments (e.g., offshore platforms).
    • OSP (Output Signal Processing) maintains predefined output states during communication loss, preventing uncontrolled process changes.
  • Efficiency and Scalability:
    • Compact design (45mm width) saves cabinet space, supporting high-density I/O racks in food & beverage packaging lines.
    • Hot-swap capability enables module replacement without system shutdown, reducing maintenance time by 50% in continuous production facilities.

4. Applications & Case Studies

  • Oil & Gas: Powers 500+ I/O modules in a Norwegian offshore platform, controlling subsea valves with ±0.1% accuracy and reducing unplanned shutdowns by 70% 17.
  • Manufacturing: Supports 24/7 automotive assembly lines in China, delivering stable 4–20mA signals to 200+ robots and reducing weld defects by 35% 18.
  • Renewable Energy: Maintains grid stability in a U.S. wind farm, providing ±10V signals to SCADA systems during voltage sags (-40% dip tolerance) 13.
Case Study: A Middle Eastern refinery deployed AO820 in redundant mode, achieving 99.999% uptime for critical reactor control loops, saving $5M annually in production losses 13.

5. Competitor Comparison

  • Output Capacity: 4 channels vs. 2–3 channels in comparable modules, supporting 33% more devices per rack.
  • Temperature Range: Operates at +55°C vs. +50°C maximum for most alternatives, critical for desert oilfield installations.
  • Efficiency: Low power consumption (6W) vs. 8–10W average, reducing cooling requirements in data centers.
    ABB AO820

    ABB AO820

6. Selection Recommendations

  • Load Type: Choose current output for long-distance signal transmission (e.g., 4–20mA for 600m cable runs) or voltage output for short-range applications (e.g., ±10V for local actuators).
  • Redundancy: Pair with AO820-H (IP65 variant) for outdoor/washdown areas (e.g., wastewater plants).
  • Future-Proofing: While compatible with legacy systems, consider ABB’s AO830 (8 channels) for new projects requiring scalability.

7. Installation & Maintenance Notes

  • Wiring: Use AWG 16–18 cables for output (max 600m run) and shielded cables to minimize EMI interference.
  • Cooling: Maintain 10mm airflow clearance; add fans for ambient temperatures >40°C.
  • Calibration: Annual voltage/current checks via front-panel LEDs ensure ±1% tolerance.
  • Safety: Disconnect power before adjusting settings; wear ESD gloves during handling.

 

Shanxi Xinyeda International Trading Co., Ltd. supplies new and refurbished AO820 modules, fully tested for ABB system compatibility. Our 3-year warranty and 24/7 technical support ensure seamless integration. Visit www.xydcontrol.com or contact us for quotes and replacement guidance.
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