DIOs (Digital Inputs/Outputs) are essential interfaces in automation and testing systems, allowing the reading and control of digital signals — that is, binary signals with only two possible states: on/off (1/0). They are used to interact with sensors, actuators, relays, valves, and other industrial devices.
DIO boards or modules are designed to operate with different voltage ranges, such as 0–5V, 0–12V, or 0–24V, and support high-frequency switching in applications that require fast and reliable responses.
🔌 What are DIOs used for?
DIOs are used for both state monitoring and device control in industrial, laboratory, and embedded systems.
Application examples:
- Reading the state of limit switches
- Detection of logical level in buttons or switches
- Activation of relays, solenoids, valves
- Generation of digital signals for functional tests
- Pulse counting and reading of digital encoders
🧰 Types of DIO Channels
| Channel Type | Description | Usage Example |
|---|---|---|
| Digital Input (DI) | Reading of logical state (1/0) | Check if a door is closed |
| Digital Output (DO) | Sending digital control signal | Activate an alarm or a motor |
| Digital Counters | Reading of pulses or timed events | Counting parts on conveyors |
🛠️ How AJOLLY Testing Integrates DIOs in Test Systems
AJOLLY Testing designs complete systems with DIO interfaces for:
- Automated functional tests of electronic boards (PCBA)
- Control of test jigs (pneumatic actuators, LEDs, locks)
- Simulation of digital signals in test equipment
- Real-time monitoring with traceability and logging
- Integration with LabVIEW, TestStand, C#, Arduino, and NI-DAQmx
Our systems allow the use of DIOs with electrical isolation, surge protection, and compatibility with industrial signals.
✅ Advantages of DIO interfaces
- High switching speed and reliability
- Compatibility with multiple voltage ranges
- Support for multiplexed or dedicated I/O
- Integration with embedded systems, test benches, and PLCs
- Simple and effective interface for automation and control
⚙️ What are Digital Inputs and Outputs (DIO)? Binary control for automation and industrial testingDIOs are the foundation of industrial binary automation. With AJOLLY Testing, their application is elevated to robust, traceable, and optimized systems for production and validation.