Reliable and Versatile I/O Module for Industrial Automation
The Selio 8-Relay Modbus RTU I/O Module is a robust, high-performance solution for industrial automation, process control, and data acquisition. Featuring Modbus RTU communication over RS485, this module is designed for seamless integration with PLCs, CPUs, HMIs, Arduino, Raspberry Pi, and any electronic device supporting Modbus protocols.
Key Features
- 8 Optoisolated Digital Inputs (DC/AC): Capture signals from sensors and switches with noise immunity.
- 4 Analog Inputs (12-bit resolution): Ideal for precise data acquisition from transducers and analog sensors.
- Temperature Input: Monitor environmental or process temperature directly.
- 8 Relay Outputs: Control actuators, solenoids, and other devices with reliable electromechanical relays.
- 3 Analog Voltage Outputs (0-10V, ±10V): Flexible analog signal generation for industrial applications.
- 1 Analog Current Output (4-20mA): Standard current loop output for industrial control.
- Built-in Pressure Sensor: Integrated measurement for automation or monitoring needs.
- Buzzer and LED Indicators: Real-time status feedback and alerts.
- Switches for Modbus Register Assignment: Easily configure Modbus addressing on the board.
- Reset Button: Quick system reset, also available via Modbus command.
- Wide Power Supply Range: Operates from 18VDC to 34VDC, with low standby power consumption (120mA @ 24VDC).
Seamless Modbus Integration
With Modbus RTU protocol support over RS485, the Selio 8-relay I/O module connects effortlessly to your existing industrial network. Assign Modbus registers directly using onboard switches for fast commissioning and flexible system expansion.
Universal Compatibility
- PLCs: Siemens, Allen-Bradley, Schneider, and more.
- CPUs & HMIs: Integrate into SCADA and industrial control systems.
- Arduino & Raspberry Pi: Perfect for custom automation and IoT projects.
- Any Modbus Device: Communicate with any controller supporting Modbus RTU.
Applications
- Distributed I/O for industrial automation
- Remote sensor and actuator control
- Data acquisition and monitoring
- Building automation systems
- Process control and instrumentation
- Custom electronic control panels
Why Choose Selio?
- High reliability for demanding industrial environments
- Ease of use quick setup and testing
- Cost-effective: Best value Modbus I/O module on the market
- Expandable: Available in 8, 16, and 24 relay configurations
Technical Specifications
| Feature | Specification |
|---|---|
| Digital Inputs | 8 optoisolated (DC/AC) |
| Analog Inputs | 4 (12-bit) |
| Temperature Input | Yes |
| Relay Outputs | 8 |
| Analog Voltage Outputs | 3 (0-10V, ±10V) |
| Analog Current Output | 1 (4-20mA) |
| Pressure Sensor | Yes |
| Communication | Modbus RTU (RS485) |
| Power Supply | 18-34VDC |
| Standby Power Consumption | 120mA @ 24VDC |
| Onboard Features | Buzzer, LEDs, Reset, Switches |
Frequently Asked Questions
Q: How do I connect the Selio 8-relay module to my PLC or Arduino?
A: The Selio module communicates via Modbus RTU over RS485. Use the onboard switches to assign Modbus registers, then connect via standard RS485 wiring. Download ready-to-use libraries from our support page.
Q: Can I use both analog and digital inputs at the same time?
A: Yes, all input and output channels are available simultaneously for maximum flexibility.
Q: Is the module DIN rail mountable?
A: Yes, Selio I/O modules are designed for easy DIN rail installation in industrial panels.
Order Now
Upgrade your automation system with the Selio 8-Relay Modbus RTU I/O Module.
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