Why Choose the Unitronics IO-DI8-RO4 Digital I/O Expansion Module?
The Unitronics IO-DI8-RO4 is a compact and versatile digital I/O expansion module designed to extend the capabilities of compatible Unitronics Vision and OPLC controllers. Combining 8 digital inputs and 4 relay outputs within a single module, it provides a cost-effective solution for machine builders, control panel manufacturers and industrial automation engineers requiring additional field connectivity.
Designed for industrial automation environments, the IO-DI8-RO4 supports both PNP (source) and NPN (sink) input wiring configurations, allowing seamless integration with a wide range of sensors, switches and signalling devices. The relay outputs provide reliable switching of AC and DC loads, making the module suitable for control and monitoring applications across many industries.
With DIN rail mounting, integrated diagnostics and a built-in high-speed counter input, the IO-DI8-RO4 offers dependable performance for machine control, process automation and equipment monitoring applications.
Key Advantages
- Combines 8 digital inputs and 4 relay outputs in a single module.
- Supports both PNP and NPN sensor wiring.
- Integrated 5kHz high-speed counter input.
- Relay outputs suitable for AC and DC load switching.
- Compact DIN rail-mounted design saves panel space.
- Compatible with selected Unitronics Vision and OPLC systems.
- Status LEDs simplify troubleshooting and commissioning.
Key Features
- Unitronics IO-DI8-RO4 digital I/O expansion module.
- 8 digital inputs.
- 4 relay outputs.
- 24V DC operation.
- PNP (source) or NPN (sink) input compatibility.
- Integrated 5kHz high-speed counter on Input 7.
- 16-bit counter resolution.
- Communication and I/O status indicators.
- DIN rail or panel mounting options.
Flexible Digital Control and Monitoring
The Unitronics IO-DI8-RO4 enables engineers to expand controller capabilities by adding additional digital inputs and relay outputs without replacing existing PLC hardware. The module is ideal for connecting field devices such as sensors, push buttons, limit switches and control relays within industrial automation systems.
Its built-in high-speed counter functionality makes it suitable for pulse counting, encoder monitoring and frequency measurement applications, while the relay outputs provide reliable switching of motors, contactors, solenoids and other industrial loads.
Typical Applications
- Industrial machinery control.
- Packaging and assembly systems.
- Material handling equipment.
- Conveyor systems.
- OEM automation panels.
- Pulse counting and frequency measurement.
- Production line monitoring.
- Process automation systems.
