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IO-DI8-RO8-L – Unitronics 8 in/8 R.out 12V digital module
Unitronics IO-DI8-RO8-L digital I/O expansion module featuring 8 digital inputs, 8 relay outputs, 12V DC operation, PNP/NPN compatibility and integrated 5kHz high-speed counter functionality.
£136.86
Why Choose the Unitronics IO-DI8-RO8-L Digital I/O Expansion Module?
The Unitronics IO-DI8-RO8-L is a compact 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 in a single compact unit, it provides an efficient and cost-effective solution for machine builders, OEM manufacturers and automation engineers requiring additional control and monitoring functionality.
Designed specifically for 12V DC control systems, the IO-DI8-RO8-L supports both PNP (source) and NPN (sink) digital input configurations. This flexibility enables seamless integration with sensors, switches, push buttons and signalling devices commonly found in industrial automation applications.
With integrated 5kHz high-speed counter functionality, robust relay outputs and DIN rail mounting capability, the IO-DI8-RO8-L delivers reliable performance for machine automation, process control and equipment monitoring systems operating on 12V DC power supplies.
Key Advantages
- Combines 8 digital inputs and 8 relay outputs in one module.
- Designed for 12V DC automation systems.
- 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 reduces panel space requirements.
- Compatible with selected Unitronics Vision and OPLC controllers.
Key Features
- Unitronics IO-DI8-RO8-L digital I/O expansion module.
- 8 digital inputs in one input group.
- 8 relay outputs.
- 12V 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 12V Digital Control and Monitoring
The Unitronics IO-DI8-RO8-L enables automation engineers to expand controller functionality by adding additional digital inputs and relay outputs without replacing existing PLC hardware. The module is ideal for connecting sensors, switches, limit devices, contactors and signalling equipment within industrial control 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 and other industrial loads. The module's 12V DC operation makes it particularly suitable for machinery and control systems built around lower voltage architectures.
Typical Applications
- Industrial machinery automation.
- Packaging and assembly systems.
- Material handling equipment.
- Conveyor control systems.
- OEM control panels.
- Pulse counting and encoder monitoring.
- Production line monitoring.
- Process automation systems.
Technical Specifications
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| Signal Type / Function | Digital | |
|---|---|---|
| Device Type | Digital I/O Module | |
| Digital Inputs | 8 | |
| Digital Outputs | 8 | |
| Output Type | Relay | |
| Product Series | Unitronics Vision I/O Expansion | |
| IP Rating | IP20 | |
| Product type | Digital I/O expansion module | |
| Digital inputs | 8 | |
| Input type | PNP (source) or NPN (sink) | |
| Nominal input voltage | 12V DC | |
| Input voltage range | 10.2-15.6V DC | |
| Input current | 6mA @ 12V DC | |
| Response time | 10ms typical | |
| Relay outputs | 8 | |
| Output type | SPST-NO relay | |
| Maximum output current | 3A per output (8A total common load) | |
| Rated voltage | 250V AC / 30V DC | |
| 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-L used for?
The IO-DI8-RO8-L expands compatible Unitronics PLC systems by adding 8 digital inputs and 8 relay outputs for industrial automation applications.
What is the difference between the IO-DI8-RO8 and IO-DI8-RO8-L?
The IO-DI8-RO8-L is designed for 12V DC systems, while the standard IO-DI8-RO8 version operates with 24V DC inputs.
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-L include high-speed counting functionality?
Yes, Input 7 can function as a high-speed counter with frequencies up to 5kHz and 16-bit resolution.
How is the module installed?
The IO-DI8-RO8-L 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.
