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The DAI 01 (DAI01) is a high-precision analog input interface module designed for the ABB Freelance Distributed Control System (DCS). It acts as the interface between field instrumentation and the process...
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The DAI 01 (DAI01) is a high-precision analog input interface module designed for the ABB Freelance Distributed Control System (DCS). It acts as the interface between field instrumentation and the process station, converting variable analog signals into accurate digital values for real-time monitoring and control execution.
Engineered for flexibility, the DAI 01 provides dual-mode measurement capability, allowing each channel to be independently configured for either voltage or current input. The module incorporates galvanic isolation per channel, effectively preventing ground loops and protecting the controller from field-side electrical disturbances.
Its compact mechanical design makes it suitable for decentralized I/O cabinets and applications where DIN-rail space efficiency is critical.
| Specification | Description |
|---|---|
| Model Designation | DAI 01 (DAI01) |
| Product Type | Analog Input Module for ABB Freelance DCS |
| Input Channels | 2 fully isolated channels |
| Signal Ranges (Configurable) | 0–10 V (Voltage) or 0–20 mA (Current) |
| Measurement Resolution | 12-bit (4096 steps) |
| Sampling Update Rate | 100 Hz |
| Input Impedance | 10 MΩ |
| Surge Protection | Rated up to 150 Vrms against overvoltage/overcurrent |
| Isolation | Channel-to-channel and channel-to-logic galvanic isolation |
| Physical Dimensions | 90 mm × 90 mm × 70 mm |
The DAI 01 is typically used for acquiring analog process signals such as:
Pressure transmitters
Temperature sensors
Flow meters
Level instrumentation
Common industries include:
Chemical processing plants
Water and wastewater treatment facilities
Power generation and utility systems
Its dual-input design makes it well-suited for compact process skids or distributed automation nodes within Freelance-based systems.
Can I mix voltage and current inputs on a single DAI 01 module?
Yes. Each channel can be independently configured, allowing one channel to measure 0–10 V while the other measures 0–20 mA.
How does the 12-bit resolution benefit process control?
A 12-bit resolution provides 4,096 discrete measurement steps, enabling accurate detection of small process variations and improving control loop precision within the Freelance DCS environment.
