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ABB AO801 8-channel analog input module has

1. Product Description

The ABB AO801 is a high-performance 8-channel analog output module tailored for industrial automation control systems. It receives digital control signals from upper controllers (e.g., ABB AC 800M DCS) and converts them into stable analog output signals (current or voltage), which are used to drive on-site executive components such as control valves, variable frequency drives (VFDs), and regulators. With precise signal conversion, strong load adaptability, and reliable anti-interference performance, the module enables accurate regulation of industrial process parameters (e.g., flow, pressure, speed), ensuring stable operation of production lines in complex industrial environments.

2. Detailed Parameters

Parameter Category	Specifications
Output Channels	8 channels (isolated per channel)
Supported Signal Types	Current: 4-20 mA, 0-20 mA; Voltage: 0-5 V, 0-10 V (configurable per channel)
Accuracy	±0.1% of full scale (at 25°C, for 4-20 mA / 0-10 V signals)
Resolution	16-bit DAC (digital-to-analog conversion)
Isolation	Channel-to-channel: 500 V DC; Channel-to-backplane: 1500 V DC
Load Capacity	Current output: Max 500 Ω (4-20 mA); Voltage output: Min 1 kΩ (0-10 V)
Operating Temperature	-40°C to +70°C
Power Supply	24 V DC (voltage range: 19.2-28.8 V DC)
Dimensions (W×H×D)	48.3 × 100 × 150 mm
Mounting Method	DIN rail mounting (compatible with standard 35 mm DIN rails)
Calibration	Supports software-based zero and span calibration, automatic drift compensation

3. Advantages & Features

High Conversion Precision: 16-bit DAC and ±0.1% full-scale accuracy ensure minimal deviation of analog output signals, enabling precise control of executive components (e.g., fine-tuning control valves for flow regulation).

Flexible Signal Configuration: Each channel can be independently set to current (4-20 mA/0-20 mA) or voltage (0-5 V/0-10 V) output, adapting to different load types without additional signal converters.

Reliable Isolation Protection: Independent channel isolation (500 V DC) and channel-to-backplane isolation (1500 V DC) prevent mutual interference between signals and protect the upper controller from high-voltage feedback damage.

Strong Load Adaptability: Wide load resistance range (500 Ω max for current output, 1 kΩ min for voltage output) supports various executive components, from small solenoid valves to large VFDs.

Low Maintenance Cost: Software calibration and automatic drift compensation reduce on-site debugging workload; modular design allows quick replacement without shutting down the entire system, minimizing production downtime.

4. Application Fields

Petroleum & Chemical Industry: Outputting analog signals to control pipeline flow valves, reactor pressure regulators, and chemical dosing pumps for precise adjustment of process parameters.

Power Generation: Driving turbine speed regulators, boiler water level control valves, and fan VFDs to maintain stable operation of power generation equipment.

Water Treatment: Controlling sewage treatment aerator speed (via VFDs) and chemical dosing pump flow to ensure water quality meets standards.

Metallurgical Industry: Regulating furnace temperature control valves, rolling mill speed drives, and material feeding conveyors to optimize smelting and processing efficiency.

5. Precautions

Confirm the load type (current/voltage) and resistance range before wiring; mismatched loads may cause signal distortion or module overheating.

For inductive loads (e.g., VFDs, solenoid valves), install freewheeling diodes or surge suppressors in parallel with the load to suppress voltage spikes and protect the module’s output circuit.

Avoid applying reverse voltage to the module’s power terminal or output channels, as this may damage the internal DAC circuit.

When installing in dusty or high-humidity environments, use a sealed cabinet with ventilation to prevent dust accumulation or moisture intrusion affecting module performance.

Regularly check the module’s output signal accuracy (via a multimeter or controller diagnostics); perform calibration promptly if deviation exceeds the allowable range (±0.1% of full scale).

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