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Reliable and Versatile I/O Module for Industrial Automation
The Selio 8-Relay Modbus I/O Module is a robust, high-performance solution for industrial automation, process control, and data acquisition. Featuring Modbus RTU over RS485 and Modbus TCP/IP over Ethernet, 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 (RS485) and Modbus TCP/IP (Ethernet) support, 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 or Modbus TCP/IP.
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) & Modbus TCP/IP (Ethernet) |
| 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 or Modbus TCP/IP over Ethernet. Use the onboard switches to assign Modbus registers, then connect via RS485 wiring or your plant Ethernet. 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 I/O Module (RTU & TCP/IP).
Use the chat widget in the bottom right corner of this page to reach out to the team and receive a quotation.