IO-RO8L – Unitronics 8 relay outputs module 12V

Why Choose the Unitronics IO-RO8L Relay Output Expansion Module?

The Unitronics IO-RO8L is a compact 8-channel relay output expansion module designed for use with compatible Unitronics OPLC and Vision™ series controllers. It allows engineers to expand PLC output capacity by adding additional relay outputs for controlling industrial loads such as motors, solenoids, valves, lamps and contactors.

This module integrates directly into the Unitronics modular I/O architecture via an expansion adapter, enabling flexible system configuration and scalable automation design. It supports both AC and DC load switching through its relay contacts, making it suitable for a wide range of industrial control applications.

The IO-RO8L is the 12 V DC supply version of the relay output module family. It provides eight SPST-NO relay outputs with electrical isolation provided by the relay contacts themselves. The module can be installed quickly using a standard 35 mm DIN rail or screw mounting, making it ideal for control cabinets and industrial panels.

Key Features

• 8 relay outputs for controlling industrial loads.
• Compatible with Unitronics Vision and OPLC systems.
• SPST-NO relay contacts supporting AC or DC switching.
• 12 V DC module power supply.
• LED indicators for each output channel status.
• DIN-rail or screw mounting for control panels.
• Electrical isolation provided by relay contacts.
• Expandable architecture for scalable automation systems.

Technical Specifications

• Manufacturer: Unitronics
• Model: IO-RO8L
• Type: Relay output expansion module
• Number of outputs: 8 relay outputs
• Relay contact type: SPST-NO
• Maximum switching current: 5 A (resistive load)
• Maximum inductive load: 1 A
• Output switching voltage: up to 230 VAC or 12/24 VDC
• Module supply voltage: 12 V DC (10.2 – 15.6 VDC)
• Maximum switching frequency: approx. 10 Hz
• Status indicators: LED for each output channel
• Dimensions: approx. 80 × 93 × 60 mm
• Mounting: 35 mm DIN rail or screw mount
• Operating temperature: 0 °C to 50 °C
• Protection rating: IP20

Modular PLC I/O Expansion

Unitronics modular I/O systems allow engineers to expand PLC functionality without replacing the main controller. By adding modules such as the IO-RO8L, automation systems can increase the number of available outputs while maintaining a compact and organised control panel layout.

Relay outputs provide galvanic isolation and are ideal for switching mixed loads, making them particularly suitable for industrial automation systems where both AC and DC devices must be controlled.

Typical Applications

• Industrial machine automation.
• Motor starters and contactor control.
• Solenoid valve and actuator switching.
• Lighting and signal control.
• Automation control panels and OEM equipment.

Trusted by Automation Engineers

Unitronics modular I/O expansion modules are widely used by machine builders and automation engineers for scalable PLC control systems in industrial automation environments.