IO-AI4-AO2 – Unitronics 4 in / 2 out analog module

IO-AI4-AO2 – Unitronics 4 in / 2 out analog module

Unitronics IO-AI4-AO2 analogue I/O expansion module featuring 4 analogue inputs and 2 analogue outputs for industrial automation and process control applications.

SKU: IO-AI4-AO2Alt SKU: IOAI4AO2MPN: IO-AI4-AO2
Price
List Price £201.25 ex VAT
Your Price (ex VAT)
£201.25
Manufacturer Lead Time Please contact us for a delivery time before you order
Get the best trade prices Trade exclusive

Create a trade account to unlock exclusive pricing, special offers and more.

SUBTOTAL (EX VAT) £201.25
Trade pricing is personalised to your account

Manufacturer Lead Time

£201.25

Why Choose the Unitronics IO-AI4-AO2 Analog I/O Expansion Module?

The Unitronics IO-AI4-AO2 is a versatile analog I/O expansion module designed to extend the capabilities of compatible Unitronics OPLC and Vision controllers. Featuring 4 analogue inputs and 2 analogue outputs, it enables seamless integration of sensors, transmitters, actuators and process control devices into industrial automation systems.

Designed for demanding industrial environments, the IO-AI4-AO2 supports multiple signal types including voltage and current inputs and outputs. This flexibility allows engineers to connect a wide range of instrumentation devices whilst maintaining precise process monitoring and control. The module interfaces with the controller via a dedicated expansion adapter and can be mounted on a DIN rail or directly onto a panel.

With 4 x 12-bit analogue inputs and 2 x 12-bit analogue outputs, the IO-AI4-AO2 is ideal for process automation, HVAC systems, water treatment applications, machine control and industrial monitoring systems requiring reliable analogue signal handling.

Key Advantages

  • Provides 4 analogue inputs and 2 analogue outputs.
  • Supports both voltage and current signal ranges.
  • 12-bit input resolution for accurate measurement.
  • 12-bit signed output resolution for precise control.
  • Compatible with selected Unitronics OPLC and Vision controllers.
  • DIN rail or panel mounting flexibility.
  • Ideal for industrial process monitoring and control applications.

Key Features

  • Unitronics IO-AI4-AO2 Expansion Module.
  • 4 analogue inputs.
  • 2 analogue outputs.
  • Input ranges: 0-10V, 0-20mA, 4-20mA.
  • Output ranges: ±10V, 0-20mA, 4-20mA.
  • 12-bit analogue input resolution.
  • 12-bit signed analogue output resolution.
  • Status and diagnostic indicators.
  • Industrial-grade construction.

Precise Analogue Monitoring and Control

The IO-AI4-AO2 enables industrial controllers to interface directly with analogue field devices such as pressure transmitters, flow meters, temperature transmitters, proportional valves and variable speed drives. Its flexible signal range support simplifies integration into a wide range of automation systems.

By providing both analogue inputs and outputs within a single expansion module, the IO-AI4-AO2 helps reduce panel space requirements while delivering accurate monitoring and responsive process control for industrial applications.

Typical Applications

  • Process automation systems.
  • Water and wastewater treatment plants.
  • HVAC control systems.
  • Industrial machinery.
  • Energy management systems.
  • Building automation.
  • Pump and motor control applications.
  • Industrial monitoring and data acquisition.

Technical Specifications

Tick the specs you need, then view products that match.

Product Series Unitronics Vision I/O Expansion
Analogue I/O 4 AI / 2 AO
Signal Type / Function Analogue
Signal / Input Range 0–10 V, 0–20 mA, 4–20 mA
Product type Analog I/O Expansion Module
Analog inputs 4
Input signal ranges 0-10V, 0-20mA, 4-20mA
Input resolution 12-bit
Analog outputs 2
Output signal ranges ±10V, 0-20mA, 4-20mA
Output resolution 12-bit + sign
Mounting type DIN rail or panel mounting
Controller interface Expansion adapter connection
Status indication Communication and I/O status LEDs
Application Industrial automation and process control

Frequently Asked Questions

What is the Unitronics IO-AI4-AO2 used for?

The IO-AI4-AO2 is an analogue I/O expansion module used to add four analogue inputs and two analogue outputs to compatible Unitronics controllers.

What analogue input signals are supported?

The module supports 0-10V, 0-20mA and 4-20mA analogue input signals.

What analogue output signals are available?

The outputs support ±10V, 0-20mA and 4-20mA signal ranges.

How many analogue channels does the module provide?

The module provides 4 analogue inputs and 2 analogue outputs.

How is the module installed?

The IO-AI4-AO2 can be mounted on a DIN rail or directly onto a mounting plate and connects to the controller via a Unitronics expansion adapter.

Trusted by Automation Engineers Worldwide

Unitronics analogue expansion modules are widely used in industrial automation systems where accurate process measurement, reliable analogue control and seamless PLC integration are essential for operational performance.

● Service Agreements

Credit Accounts

Our service agreements are built to support long term procurement relationships. By working closely with engineering teams and procurement departments, we help streamline purchasing processes while ensuring consistent access to critical components and sourcing support when it matters most.

 Priority sourcing and supply support

 Flexible payment terms for qualifying organisations

 Support for engineering, maintenance, and operations

500 +

Stock lines ready to ship

1,000 +

Same day dispatches

3500 +

Customers supported

28 

Trusted Manfacturers

● frequently asked questions

Common questions about our products and support

 

At Led Controls Ltd we help engineers source the right automation and control gear with confidence. below are quick answers to what we are asked most often.

What product ranges do you supply

We supply all leading manfacturers in our industry. we offer next day delivery on most poplour products. 

Can you help specify the correct part?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

Do you have stock for urgent orders?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What are your delivery times and costs?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

What about warranties, returns and faulty items?

Your content goes here. Edit or remove this text inline or in the module Content settings. You can also style every aspect of this content in the module Design settings and even apply custom CSS to this text in the module Advanced settings.

● latest blog

Discover  our latest insights and
expert advice

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

From a Simple Idea to Small Business of the Year: The LED Controls Story So Far…

LED Controls is a specialist distributor of factory automation and industrial controls, supplying OEMs, machine builders, panel builders and end users throughout the UK and worldwide. As a trusted UK distributor for many of the world’s leading automation manufacturers, we provide industrial control products, technical expertise and bespoke automation solutions backed by outstanding customer service.

LED Controls: Danfoss Drives Authorised Partner

LED Controls: Danfoss Drives Authorised Partner

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...

LED Controls: Your Complete Control Panel Solution

LED Controls: Your Complete Control Panel Solution

2025 has been a big year for LED Controls, and our blog has expanded accordingly. We've covered a wide range of topics across industrial control and factory automation this year. From core technology explainers and new product releases to panel building best practice...