A I/O module (Input/Output module) or I/O Module (Input/Output Module) is a hardware component for acquiring and outputting electrical signals. It serves as an interface between a measurement, control, or automation system and the connected sensors or actuators.
Measurement values, switch states, or other process signals can be acquired through the inputs of an I/O module. The outputs, on the other hand, allow control commands or signals to be sent to external devices such as relays, valves, motors, or warning systems.
In the devices from the Delphin Message Series I/O modules handle the connection of a wide variety of sensors and actuators and expand the functionality of the measurement and data acquisition system. Depending on the model, digital and analog inputs and outputs are available for a wide range of applications.
Functions of an I/O Module
Typical functions of an I/O module include:
- Acquisition of Analog Measurement Signals
- Recording of Digital Switching States
- Output of analog control signals
- Switching Digital Outputs
- Connecting Sensors and Transducers
- Control of External Actuators and Processes
Analog and Digital I/O Signals
Depending on the model, I/O modules support different signal types:
Analog inputs
- Voltage signals (e.g., 0–10 V)
- Current signals (e.g., 4–20 mA)
- Temperature Sensor
- Process and Measurement Signals
Digital Inputs
- Switches and Push Buttons
- Limit Switch
- Proximity Sensors
- Pulse and Frequency Signals
Digital Outputs
- Relay Controls
- Signal Lights
- Valves
- Valves and Actuators
Applications in Measurement Technology
I/O modules are key components of modern measurement and automation systems and are used in the following areas, among others:
- Data Collection and Monitoring
- Machine and Equipment Monitoring
- Test stand automation
- Energy and Environmental Measurement Technology
- Process monitoring
- Building Automation
Advantages of I/O Modules
- Flexible Connection of Sensors and Actuators
- Expansion of Existing Measurement Systems
- Support for various signal types
- Direct integration into automation processes
- Scalability for Growing Applications
- Simplified Wiring and System Integration
In the Message Series devices, I/O modules form an important foundation for the acquisition, processing, and output of process data and enable the system to be flexibly adapted to a wide variety of measurement and automation tasks.