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IO-DI8-TO8 – Unitronics 8 in / 8 out digital module
Unitronics IO-DI8-TO8 digital I/O expansion module featuring 8 digital inputs, 8 PNP transistor outputs, 24V DC operation and integrated 5kHz high-speed counter functionality.
£121.98
Why Choose the Unitronics IO-DI8-TO8 Digital I/O Expansion Module?
The Unitronics IO-DI8-TO8 is a compact and high-performance digital I/O expansion module designed to extend the capabilities of compatible Unitronics Vision and OPLC control systems. Combining 8 digital inputs and 8 transistor outputs within a single module, it provides a fast and efficient solution for industrial automation, machine control and OEM equipment applications.
Designed for 24V DC control systems, the IO-DI8-TO8 supports both PNP (source) and NPN (sink) digital input configurations. The module features 8 PNP transistor outputs for high-speed switching applications, making it particularly suitable for controlling solenoids, indicators, relays and other electronic devices requiring rapid response times.
With integrated 5kHz high-speed counter functionality, short-circuit protected outputs and DIN rail mounting capability, the IO-DI8-TO8 delivers dependable performance for industrial control systems where speed, reliability and flexible expansion are essential.
Key Advantages
- Combines 8 digital inputs and 8 transistor outputs in one compact module.
- Designed for 24V DC industrial control systems.
- Supports both PNP and NPN input wiring.
- Includes 5kHz high-speed counter and frequency measurement functionality.
- Fast transistor outputs provide rapid switching performance.
- Short-circuit protection on all outputs.
- Compact DIN rail-mounted design reduces panel space requirements.
Key Features
- Unitronics IO-DI8-TO8 digital I/O expansion module.
- 8 digital inputs.
- 8 PNP transistor outputs.
- 24V DC nominal operation.
- PNP (source) or NPN (sink) input compatibility.
- Input 7 supports 5kHz high-speed counting.
- 16-bit counter resolution.
- Integrated short-circuit protection.
- LED status indicators for inputs and outputs.
- DIN rail or panel mounting options.
Fast Digital Control for Industrial Automation
The Unitronics IO-DI8-TO8 enables automation engineers to expand PLC functionality with both additional inputs and high-speed transistor outputs. Unlike relay-based modules, transistor outputs provide rapid switching performance, making the module ideal for applications requiring fast response times and frequent switching cycles.
Its integrated high-speed counter and frequency measurement capability supports encoder monitoring, pulse counting and speed measurement applications, while short-circuit protected transistor outputs help improve overall system reliability.
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 / Input Range | 24 V DC | |
|---|---|---|
| Coil / Supply Voltage | 10.2–28.8 V DC | |
| Digital Inputs | 8 | |
| Digital Outputs | 8 | |
| Output Type | Transistor | |
| Signal Type / Function | Digital | |
| 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 | 24V DC | |
| Input current | 6mA @ 24V 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 operating 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 | |
| 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 used for?
The IO-DI8-TO8 expands compatible Unitronics PLC systems by adding 8 digital inputs and 8 transistor outputs for industrial automation applications.
What type of outputs does the module provide?
The module provides 8 PNP (source) transistor outputs using P-MOSFET open-drain technology for fast switching performance.
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 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.
How is the module installed?
The IO-DI8-TO8 can be mounted on a standard 35mm DIN rail or secured directly to a control panel.
Trusted by Automation Engineers Worldwide
Unitronics digital I/O expansion modules are widely used in industrial automation systems where fast switching performance, reliable signal processing and scalable PLC expansion are essential for machine efficiency and productivity.
