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ABB AI 723F
Product Name
ABB AI 723F analog input module
Product Introduction
The ABB AI 723F is a 16-channel analog input module in the S700 I/O family. It acquires analog field signals and resistance temperature detector measurements, converts them into digital values, and transmits the data to a Freelance controller or PROFIBUS remote I/O station.
Detailed content
Technical Specifications
- Number of channels: 16
- Channel arrangement: two groups of eight
- Supported signals: 0–10 V, -10 to +10 V, 0–20 mA, 4–20 mA
- Temperature inputs: Pt100, Pt1000, Ni1000
- RTD wiring: 2-wire or 3-wire
- Optional use as digital inputs
- Resolution: 12 bits plus sign
- Voltage input impedance: greater than 100 kΩ
- Module power supply: 24 V DC
- Dimensions: 67.5 × 76 × 54 mm
- Weight: approximately 0.15 kg
Function Features
- Individually configurable input channels
- Voltage, current, RTD, and digital-input capability
- Electrical isolation between field inputs and module electronics
- No potential separation between channels
- PROFIBUS remote I/O operation
- Direct I/O for AC 700F and AC 900F controllers
- Compatible terminal units: TU 715F and TU 716F
Application Scenarios
- Pressure, temperature, flow, and level monitoring
- Chemical and petrochemical process control
- Power generation and water treatment
- Industrial furnaces and building automation
- Freelance DCS signal acquisition
- Remote I/O stations in large process plants
Performance Parameters
- Measurement resolution: 12 bits plus sign
- Typical measurement accuracy: approximately ±0.1% of full scale at 25 °C
- Suitable for continuous industrial process measurement
- Real-time transmission of converted measurement values to the controller
Material Composition
- Industrial-grade module housing
- Printed circuit board with analog signal-conditioning and conversion circuits
- Spring-clamp field terminals
- Backplane connector
- Electrical isolation components
Structural Features
- Standard S700 modular design
- Rear backplane bus connector
- Front-facing field wiring terminals
- Mounts on a DIN-rail terminal unit
- Slim, high-density industrial I/O form factor
Working Principle
Each channel receives a voltage, current, or RTD resistance signal. Current inputs use a precision shunt, while RTD inputs use a measured excitation current and known reference resistance. The module conditions the signal, performs analog-to-digital conversion, and sends the digital measurement to the controller through the backplane or PROFIBUS interface.
Installation Requirements
- Mount the terminal unit on a standard 35 mm DIN rail
- Install inside a suitable control cabinet
- Use the correct terminal unit for the selected wiring configuration
- Follow two-wire or three-wire RTD connection rules
- Separate analog and power cables
- Use ESD protection when handling the module
Usage Precautions
- Channels are not isolated from one another.
- Do not exceed the configured voltage or current range.
- Configure each channel in the control system before commissioning.
- Do not hot-swap the module.
- Verify sensor type, wiring, and calibration during commissioning.
