Description
Detailed Parameter Table
| Parameter Name | Parameter Value |
| Product Model | AO02 |
| Manufacturer | ABB |
| Product Category | Analog Output Module (S900 I/O Series) |
| Channels | 2 isolated channels |
| Output Signal | 0–20 mA, 4–20 mA (user-selectable per channel) |
| Resolution | 16-bit |
| Accuracy | ±0.1% of span (±35 μA) at 25°C |
| Load Impedance | ≤ 750 Ω per channel |
| Update Rate | 10 ms per channel |
| Isolation | 500 V AC (channel-to-channel and channel-to-bus) |
| Power Consumption | 1.2 W (typical) |
| Operating Temperature | -25°C to +70°C |
| Connection | Spring-clamp terminals (screwless) |
| HART Support | Yes (via dedicated terminals) |
ABB AO02
Product Introduction
The ABB AO02 is a high-precision 2-channel analog output module from ABB’s S900 I/O series, designed for integration with ABB’s AC800M PLC and Advant Controller systems. This module converts digital control signals into precise analog current outputs (0–20 mA or 4–20 mA) to actuate valves, drives, and other process-critical devices. As a key component in ABB’s distributed control architecture, the ABB AO02 enables closed-loop control in complex automation systems.
Engineered for industrial environments, the ABB AO02 features galvanic isolation between channels and the control bus, preventing ground loops and electrical noise interference. Native HART protocol support allows simultaneous analog signal transmission and digital diagnostics with smart field devices. The module’s hot-swappable design ensures minimal downtime during maintenance, while its ±0.1% accuracy guarantees process stability in applications demanding precise control.
Core Advantages and Technical Highlights
The ABB AO02 delivers exceptional performance and reliability:
Precision Engineering: With 16-bit resolution and ±0.1% accuracy, the ABB AO02 maintains signal integrity even in electrically noisy environments like power plants or chemical facilities. Auto-calibration via Control Builder software compensates for temperature drift.
Integrated Diagnostics: Continuous channel monitoring detects open-circuit, short-circuit, and overload conditions. HART digital overlay enables predictive maintenance by reading device health data from smart transmitters without interrupting analog signals.
Flexible Configuration: Each channel operates independently with selectable current ranges (0–20 mA / 4–20 mA). The ABB AO02 supports seamless replacement without system shutdown via hot-swap functionality.
Robust Design: Operating from -25°C to +70°C with 95% non-condensing humidity tolerance, the module withstands harsh industrial environments. Spring-clamp terminals ensure vibration-resistant connections (up to IEC 60068-2-6: 5g).
Simplified Integration: Pre-engineered function blocks in ABB’s Control Builder automate configuration, reducing commissioning time by 50% compared to generic I/O.
Typical Application Scenarios
The ABB AO02 excels in process control applications:
In oil & gas refineries, the ABB AO02 modulates control valves for flow/pressure regulation. Its HART capability enables real-time diagnostics of valve positioners, predicting stiction issues before failures occur. Galvanic isolation prevents ground loops in cathodically protected pipelines.
For pharmaceutical batch processes, the module precisely doses ingredients via proportional valves. The ABB AO02’s ±0.1% accuracy ensures recipe consistency, while 16-bit resolution enables smooth ramping during phase transitions.
In water treatment plants, it controls VFD-driven pumps for chemical injection. The module’s 750 Ω load capacity supports long cable runs to remote stations, and its IP20-rated terminals resist corrosion in humid environments.
ABB AO02
Related Model Recommendations
AI01: Analog input module; complements AO02 in control loops.
DI01: Digital input module; monitors device status in AO02-controlled systems.
PM864AK01: AC800M CPU; processes logic for AO02 outputs.
TB811: Terminal base unit for AO02; simplifies wiring.
CI854: PROFIBUS module; networks AO02 with field devices.
SD822: Digital output module; interfaces with AO02 in safety interlocks.
ABB 3BSE009598R0001: Redundant power supply for AO02 critical systems.
Installation, Commissioning and Maintenance Instructions
Installation Preparation:
Verify baseplate compatibility (e.g., EJ901). Disconnect system power. Ensure ambient temperature <70°C. Use shielded twisted-pair cables for analog outputs. Ground shields at one end only.
Maintenance Suggestions:
Calibrate HART devices annually via Control Builder. Monitor “Load Resistance” diagnostics to detect cable degradation. Clean terminals quarterly with non-abrasive tools. Replace ABB AO02 if STATUS LED indicates persistent fault (solid red). Always use ABB-approved replacement modules to maintain SIL ratings.
Service and Guarantee Commitment
ABB provides a 36-month warranty for the AO02, covering material and manufacturing defects. Global technical support includes access to Control Builder configuration templates and 24/7 troubleshooting. Firmware updates are provided free of charge. Extended service agreements (ESA) offer calibration services and lifecycle management. All modules undergo 48-hour burn-in testing with full signal integrity validation.
