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IO-DI8-RO8 – Unitronics 8 in / 8 R.out digital module
Unitronics IO-DI8-RO8 digital I/O expansion module featuring 8 digital inputs, 8 relay outputs, 24V DC operation, PNP/NPN compatibility and integrated 5kHz high-speed counter functionality.
£136.86
Why Choose the Unitronics IO-DI8-RO8 Digital I/O Expansion Module?
The Unitronics IO-DI8-RO8 is a robust and versatile digital I/O expansion module designed to increase the capabilities of compatible Unitronics Vision and OPLC control systems. Combining 8 digital inputs and 8 relay outputs within a compact housing, the module provides an efficient solution for industrial automation, machinery control and OEM applications.
Designed for 24V DC control systems, the IO-DI8-RO8 supports both PNP (source) and NPN (sink) input configurations, allowing seamless integration with sensors, switches, push buttons and signalling devices. The relay outputs provide reliable switching of AC and DC loads, making the module suitable for a wide variety of industrial control tasks.
With DIN rail mounting, integrated status diagnostics and a built-in 5kHz high-speed counter input, the IO-DI8-RO8 delivers dependable performance for machine automation, process control and monitoring applications.
Key Advantages
- Combines 8 digital inputs and 8 relay outputs in a single module.
- Designed for 24V DC industrial control systems.
- Supports both PNP and NPN sensor wiring.
- Integrated 5kHz high-speed counter functionality.
- Relay outputs suitable for switching AC and DC loads.
- Compact DIN rail-mounted design reduces panel space requirements.
- Compatible with selected Unitronics Vision and OPLC controllers.
Key Features
- Unitronics IO-DI8-RO8 digital I/O expansion module.
- 8 digital inputs.
- 8 relay outputs.
- 24V DC nominal operation.
- PNP (source) or NPN (sink) input compatibility.
- Input 7 supports 5kHz high-speed counting.
- 16-bit counter resolution.
- Green input and red output status LEDs.
- DIN rail or panel mounting options.
Reliable Digital Control and Monitoring
The Unitronics IO-DI8-RO8 enables engineers to expand PLC functionality by adding digital inputs and relay outputs without replacing existing controllers. The module is ideal for connecting sensors, switches, push buttons, contactors and signalling devices within industrial automation systems.
Its integrated high-speed counter capability supports pulse counting, encoder monitoring and frequency measurement applications, while the relay outputs provide dependable switching of motors, solenoids, relays and industrial control circuits.
Typical Applications
- Industrial machinery automation.
- Packaging and assembly equipment.
- Material handling systems.
- Conveyor control systems.
- OEM control panels.
- Pulse counting and encoder monitoring.
- Production line monitoring.
- Process automation systems.
Technical Specifications
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| Signal / Input Range | 24 V DC | |
|---|---|---|
| Product Series | Unitronics Vision I/O Expansion | |
| Device Type | Digital I/O Module | |
| Digital Inputs | 8 | |
| Digital Outputs | 8 | |
| Output Type | Relay | |
| Signal Type / Function | Digital | |
| IP Rating | IP20 | |
| Product type | Digital I/O expansion module | |
| Digital inputs | 8 | |
| Input type | PNP (source) or NPN (sink) | |
| Nominal input voltage | 24V DC | |
| Input current | 6mA @ 24V DC | |
| Response time | 10ms typical | |
| Relay outputs | 8 | |
| Output type | SPST-NO relay | |
| Maximum output current | 3A per output, 8A total common load | |
| Relay voltage | 250V AC / 30V DC maximum | |
| Minimum load | 1mA @ 5V DC | |
| High-speed counter | Input 7 | |
| Counter resolution | 16-bit | |
| Maximum frequency | 5kHz | |
| Minimum pulse width | 80μs | |
| Protection rating | IP20 / NEMA 1 | |
| Operating temperature | 0°C to +50°C | |
| Dimensions (W × H × D) | 80 × 93 × 60 mm | |
| Weight | Approximately 300 g | |
| Mounting type | DIN rail or panel mounting |
Frequently Asked Questions
What is the Unitronics IO-DI8-RO8 used for?
The IO-DI8-RO8 expands compatible Unitronics PLC systems by adding 8 digital inputs and 8 relay outputs for industrial automation applications.
Does the module support both PNP and NPN sensors?
Yes, the digital inputs support both PNP (source) and NPN (sink) wiring configurations.
Does the IO-DI8-RO8 include high-speed counting functionality?
Yes, Input 7 can function as a high-speed counter with frequencies up to 5kHz and 16-bit resolution.
What type of outputs are included?
The module provides 8 SPST-NO relay outputs capable of switching AC or DC loads up to 3A per output.
How is the module installed?
The IO-DI8-RO8 can be mounted on a standard 35mm DIN rail or secured directly to a control panel.
Trusted by Automation Engineers Worldwide
Unitronics expansion modules are widely used throughout industrial automation systems where dependable digital control, flexible I/O expansion and reliable long-term operation are essential for machine performance and productivity.
