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IO-DI8-TO8-L – Unitronics 8 in / 8 out digital module 12V
Unitronics IO-DI8-TO8-L digital I/O expansion module featuring 8 digital inputs, 8 PNP transistor outputs, 12V DC operation and integrated 5kHz high-speed counter functionality.
£121.98
Why Choose the Unitronics IO-DI8-TO8-L Digital I/O Expansion Module?
The Unitronics IO-DI8-TO8-L is a compact and high-performance digital I/O expansion module designed to increase the functionality of compatible Unitronics Vision and OPLC control systems. Combining 8 digital inputs and 8 transistor outputs within a single module, it provides a reliable and space-saving solution for industrial automation, OEM machinery and machine control applications.
Designed specifically for 12V DC control systems, the IO-DI8-TO8-L supports both PNP (source) and NPN (sink) digital input configurations. Its 8 PNP transistor outputs deliver fast switching performance, making the module ideal for controlling indicators, solenoids, relays and other electronic devices requiring rapid and reliable operation.
With integrated 5kHz high-speed counter functionality, short-circuit protected outputs and flexible DIN rail mounting, the IO-DI8-TO8-L offers dependable performance in demanding industrial environments where speed, accuracy and scalability are essential.
Key Advantages
- Combines 8 digital inputs and 8 transistor outputs in one compact module.
- Designed specifically for 12V DC automation systems.
- Supports both PNP and NPN sensor wiring.
- Integrated 5kHz high-speed counter and frequency measurement.
- Fast transistor outputs provide rapid switching performance.
- Built-in short-circuit protection improves system reliability.
- Compact DIN rail-mounted design saves valuable control panel space.
Key Features
- Unitronics IO-DI8-TO8-L digital I/O expansion module.
- 8 digital inputs.
- 8 PNP transistor outputs.
- 12V DC nominal operation.
- PNP (source) or NPN (sink) input compatibility.
- Input 7 supports 5kHz high-speed counting.
- 16-bit counter resolution.
- Integrated output short-circuit protection.
- LED status indicators for inputs, outputs and fault conditions.
- DIN rail or panel mounting options.
Fast Digital Control for Industrial Automation
The Unitronics IO-DI8-TO8-L enables automation engineers to expand PLC functionality with both additional digital inputs and high-speed transistor outputs. Unlike relay-based modules, transistor outputs provide rapid switching performance, making the module suitable for applications requiring frequent operation and precise control.
Its integrated high-speed counter functionality supports pulse counting, encoder monitoring and frequency measurement tasks, while short-circuit protected outputs help maximise system uptime and operational reliability. The module is particularly suited to 12V DC control architectures commonly found in specialised machinery and OEM equipment.
Typical Applications
- Industrial machinery automation.
- Packaging and assembly equipment.
- Conveyor control systems.
- Pulse counting and encoder monitoring.
- Positioning and motion control systems.
- OEM machinery and control panels.
- Manufacturing and production equipment.
- Process automation systems.
Technical Specifications
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| Signal Type / Function | Digital | |
|---|---|---|
| Coil / Supply Voltage | 10.2–28.8 V DC | |
| Digital Inputs | 8 | |
| Digital Outputs | 8 | |
| Output Type | Transistor | |
| 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 | |
| Transistor outputs | 8 | |
| Output type | PNP (source) P-MOSFET open drain | |
| Maximum output current | 0.5A per output | |
| Total output current | 3A maximum | |
| Operating voltage | 10.2-28.8V DC | |
| Nominal output voltage | 12/24V 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 | |
| Storage temperature | -20°C to +60°C | |
| Relative humidity | 5% to 95% non-condensing | |
| Dimensions (W × H × D) | 80 × 93 × 60 mm | |
| Weight | Approximately 141 g | |
| Mounting type | 35mm DIN rail or panel mounting |
Frequently Asked Questions
What is the Unitronics IO-DI8-TO8-L used for?
The IO-DI8-TO8-L expands compatible Unitronics PLC systems by adding 8 digital inputs and 8 transistor outputs for industrial automation applications.
What is the difference between the IO-DI8-TO8 and IO-DI8-TO8-L?
The IO-DI8-TO8-L is designed for 12V DC systems, while the standard IO-DI8-TO8 version operates with 24V DC inputs.
What type of outputs does the module provide?
The module provides 8 PNP transistor outputs using P-MOSFET open-drain technology for fast switching 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-TO8-L include high-speed counting functionality?
Yes, Input 7 can function as a high-speed counter or frequency measurer with frequencies up to 5kHz and 16-bit resolution.
Trusted by Automation Engineers Worldwide
Unitronics digital I/O expansion modules are widely used throughout industrial automation systems where fast switching performance, reliable signal acquisition and scalable PLC expansion are essential for machine efficiency and productivity.
