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Modular Expansion Remote I/O Modules for Industrial Automation

Easily scale your industrial control system with our expansion remote I/O modules, engineered for flexible integration across a wide range of automation environments. Our modules offer rugged performance and modular connectivity, available in analog, digital, and mixed-signal configurations

We have been supplying remote I/O modules for over 20 years. Our comprehensive range includes Ethernet, USB, serial, wireless and fieldbus I/O modules offering analog, digital and relay acquisition and control.

Speak to our friendly team today to find out how we can support your next project.

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Showing 12 of 12 Expansion Remote I/O Modules items

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Sealevel 540N Series

32 Open-Collector Output SeaI/O Expansion Module

From £378.00 (exc. VAT)

1 option available

Sealevel 530N Series

16 Isolated Digital Input/16 Open-Collector Output SeaI/O Expansion Module

From £428.50 (exc. VAT)

1 option available

Sealevel 520N Series

8 Optically Isolated Input/8 High-Current Form C Relay Output SeaI/O Expansion Module

From £280.00 (exc. VAT)

1 option available

Sealevel 463N Series

96 Channel TTL Digital Interface SeaI/O Expansion Module

From £281.00 (exc. VAT)

3 options available

Sealevel 462N Series

96 Channel TTL DB78 Digital Interface SeaI/O Expansion Module

From £313.50 (exc. VAT)

2 options available

Sealevel 450N Series

16 Form C Relay Output SeaI/O Expansion Module

From £266.50 (exc. VAT)

1 option available

Sealevel 420N Series

16 Optically Isolated Digital Input/8 Form C Relay Output SeaI/O Expansion Module

From £266.50 (exc. VAT)

1 option available

Sealevel 410N Series

16 Optically Isolated Digital Input/16 Reed Relay Output SeaI/O Expansion Module

From £254.50 (exc. VAT)

2 options available

Sealevel 440N Series

32 Reed Relay Output SeaI/O Expansion Module – board only

From £291.00 (exc. VAT)

1 option available

Sealevel 430N Series

32 Optically Isolated Digital Input SeaI/O Expansion Module

From £230.00 (exc. VAT)

1 option available

Sealevel 470N Series

16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output SeaI/O Expansion Module

From £465.50 (exc. VAT)

1 option available

Sealevel 570N Series

8 Analog Input – 8 Isolated Digital Input/8 Form C Relay Output SeaI/O Expansion Module

From £403.00 (exc. VAT)

When Do You Need Expansion I/O?
Expansion modules increase the channel count of a base I/O system without replacing the main unit. They are useful when projects grow over time and more signals must be monitored.

What Types of Signals Can Be Expanded?
Options include digital inputs and outputs, analogue channels, temperature sensors and relay outputs. Mixing module types allows a single system to support varied signals.

Why Is Lifecycle Support Important?
We supply expansion modules with guaranteed availability for years, giving UK projects confidence that future system growth can use identical hardware.