Serial Remote I/O Modules

Serial Remote I/O modules provide reliable signal acquisition and control via RS-232, RS-422, or RS-485 interfaces. These modules offer dependable connectivity for legacy and modern industrial systems alike, especially useful if you're handling sensor inputs, relay outputs, voltage readings or TTL signals.

Contact our team for advice on selecting the right Serial I/O module for your specific application.

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Showing 60 of 68 Serial Remote I/O Modules items

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1 option available

Advantech ADAM-4068 Series

RS-485 to 8 Channel Relay Output Module – Modbus

From £145.00 (exc. VAT)

2 options available

Advantech ADAM-4150 Series

RS-485 to 15 Channel Digital I/O Module – Modbus

From £133.50 (exc. VAT)

1 option available

Advantech ADAM-4055 Series

RS-485 to 16 Channel Isolated Digital I/O Module – Modbus

From £124.00 (exc. VAT)

1 option available

Advantech ADAM-4051 Series

RS-485 to 16 Channel Isolated Digital Input Module – Modbus

From £114.50 (exc. VAT)

1 option available

Advantech ADAM-4069 Series

RS-485 to 8 Channel Power Relay Output Module – Modbus

From £178.50 (exc. VAT)

3 options available

Advantech ADAM-4017+ Series

RS-485 to 8 Channel Analog Input Module

From £164.50 (exc. VAT)

1 option available

Advantech ADAM-4115 Series

Robust RS-485 to 6 Channel RTD Input Module

From £321.00 (exc. VAT)

1 option available

Advantech ADAM-4117 Series

RS-485 to 8 Channel Analog Input Module – Modbus – Extended Wide Temperature Operation

From £238.50 (exc. VAT)

Need Help Choosing the Right Remote I/O Module?

We provide technical support for selecting reliable remote I/O solutions.

Every project has its own demands, from harsh environments to critical connectivity. Speak to our knowledgeable team who can help you identify the best fit for your setup, ensuring reliable data acquisition and long-term performance.

Call: +44 (0)1782 337 800 | Email: sales@impulse-embedded.co.uk

1 option available

Advantech ADAM-4118 Series

RS-485 to 8-Channelannel Thermocouple Input Module – Modbus

From £254.00 (exc. VAT)

Advantech ADAM-4017 Series

RS-485 to 8 Channel Analog Input Module

1 option available

Advantech ADAM-4019+ Series

RS-485 to 8 Channel Universal Analog Input Module – Modbus

From £343.50 (exc. VAT)

2 options available

Advantech ADAM-4024 Series

RS-485 to 4 Channel Analog Output Module – Modbus

From £93.50 (exc. VAT)

1 option available

Advantech ADAM-4168 Series

RS-485 to 8 Channel Reed Relay Output Module – Modbus

From £146.50 (exc. VAT)

1 option available

Advantech ADAM-4080 Series

RS-485 to 2 Channel Counter/Frequency Module

From £153.50 (exc. VAT)

1 option available

Advantech ADAM-4060 Series

RS-485 to 4 Channel Relay Output Module

From £120.00 (exc. VAT)

1 option available

Advantech ADAM-4056SO Series

RS-485 to 12 Channel Isolated Sourcing Digital Output Module – Modbus

From £131.50 (exc. VAT)

1 option available

Advantech ADAM-4053 Series

RS-485 to 16 Channel Digital Input Module

From £110.50 (exc. VAT)

1 option available

Advantech ADAM-4052 Series

RS-485 to 8 Channel Isolated Digital Input Module

From £90.50 (exc. VAT)

1 option available

Advantech ADAM-4050 Series

RS-485 to 16 Channel Digital I/O Module

From £118.50 (exc. VAT)

1 option available

Advantech ADAM-4021 Series

RS-485 to 1 Channel Analog Output Module

From £160.50 (exc. VAT)

1 option available

Advantech ADAM-4018+ Series

RS-485 to 8 Channel Thermocouple Input Module – Modbus

From £291.00 (exc. VAT)

1 option available

Advantech ADAM-4015 Series

RS-485 to 6 Channel RTD Input Module – Modbus

From £287.00 (exc. VAT)

1 option available

Sealevel 540S Series

RS-232 Modbus RTU to 32 Open-Collector Output Adapter

From £378.00 (exc. VAT)

1 option available

Sealevel 540M Series

RS-485 Modbus RTU to 32 Open-Collector Output Adapter

From £378.00 (exc. VAT)

1 option available

Sealevel 530S Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output Adapter

From £428.50 (exc. VAT)

1 option available

Sealevel 520S Series

RS-232 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 530M Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output Adapter

From £428.50 (exc. VAT)

1 option available

Sealevel 520M Series

RS-485 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 463M Series

RS-485 Modbus RTU to 96 Channel TTL Digital I/O Adapter

From £264.50 (exc. VAT)

1 option available

Sealevel 463S Series

RS-232 Modbus RTU to 96 Channel TTL Digital I/O Adapter

From £283.00 (exc. VAT)

2 options available

Sealevel 462M Series

RS-485 Modbus RTU to 96 Channel TTL DB78F Digital I/O Adapter

From £324.00 (exc. VAT)

1 option available

Sealevel 450S Series

RS-232 Modbus RTU to 16 Form C Relay Output Adapter

From £280.00 (exc. VAT)

2 options available

Sealevel 462S Series

RS-232 Modbus RTU to 96 Channel TTL DB78F Digital I/O Adapter

From £368.00 (exc. VAT)

1 option available

Sealevel 450M Series

RS-485 Modbus RTU to 16 Form C Relay Output Adapter

From £280.00 (exc. VAT)

1 option available

Sealevel 420M Series

RS-485 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output Adapter

From £266.50 (exc. VAT)

1 option available

Sealevel 420S Series

RS-232 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output Adapter

From £266.50 (exc. VAT)

1 option available

Sealevel 410S Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output Adapter

From £254.50 (exc. VAT)

1 option available

Sealevel 410M Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Reed Relay Output Adapter

From £254.50 (exc. VAT)

1 option available

Sealevel 440S Series

RS-232 Modbus RTU to 32 Reed Relay Output Adapter

From £304.50 (exc. VAT)

1 option available

Sealevel 440M Series

RS-485 Modbus RTU to 32 Reed Relay Output Adapter

From £304.50 (exc. VAT)

1 option available

Sealevel 430S Series

RS-232 Modbus RTU to 32 Isolated Digital Input Adapter

From £230.00 (exc. VAT)

1 option available

Sealevel 430M Series

RS-232 Modbus RTU to 32 Isolated Digital Input Adapter

From £230.00 (exc. VAT)

1 option available

Sealevel 470M Series

RS-485 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output Adapter

From £465.50 (exc. VAT)

1 option available

Sealevel 470S Series

RS-232 Modbus RTU to 16 Analog Input/2 Analog Output – 8 Isolated Digital Input/8 Digital Output Adapter

From £465.50 (exc. VAT)

1 option available

Sealevel 570M Series

RS-485 Modbus RTU to 8 Analog Input – 8 Isolated Digital Input/8 Form C Relay Output Adapter

From £403.00 (exc. VAT)

1 option available

Sealevel 570S Series

RS-232 Modbus RTU to 8 x 16-bit Analog Input – 8 Isolated Digital Input/8 Form C Relay Output Adapter

From £403.00 (exc. VAT)

1 option available

Sealevel 540S-OEM Series

RS-232 Modbus RTU to 32 Open-Collector Output OEM Board

From £366.00 (exc. VAT)

1 option available

Sealevel 540M-OEM Series

RS-485 Modbus RTU to 32 Open-Collector Output OEM Board

From £366.00 (exc. VAT)

1 option available

Sealevel 530S-OEM Series

RS-232 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output OEM Board

From £415.00 (exc. VAT)

1 option available

Sealevel 530M-OEM Series

RS-485 Modbus RTU to 16 Isolated Digital Input/16 Open-Collector Output OEM Board

From £415.00 (exc. VAT)

1 option available

Sealevel 520S-OEM Series

RS-232 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 520M-OEM Series

RS-485 Modbus RTU to 8 Isolated Digital Input/8 High Current Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 463S-OEM Series

RS-232 Modbus RTU to 96 Channel TTL Digital I/O OEM Board

From £257.50 (exc. VAT)

1 option available

Sealevel 463M-OEM Series

RS-485 Modbus RTU to 96 Channel TTL Digital I/O OEM Board

From £239.00 (exc. VAT)

1 option available

Sealevel 462S-OEM Series

RS-232 Modbus RTU to 96 Channel TTL DB78F Digital I/O OEM Board

From £340.50 (exc. VAT)

1 option available

Sealevel 462M-OEM Series

RS-485 Modbus RTU to 96 Channel TTL DB78F Digital I/O OEM Board

1 option available

Sealevel 450S-OEM Series

RS-232 Modbus RTU to 16 Form C Relay Output OEM Board

From £266.50 (exc. VAT)

1 option available

Sealevel 420S-OEM Series

RS-232 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output OEM Board

From £254.50 (exc. VAT)

1 option available

Sealevel 420M-OEM Series

RS-485 Modbus RTU to 16 Isolated Digital Input/8 Form C Relay Output OEM Board

From £254.50 (exc. VAT)

1 option available

Sealevel 450M-OEM Series

RS-485 Modbus RTU to 16 Form C Relay Output OEM Board

From £266.50 (exc. VAT)

Showing 60 of 68

Frequently Asked Questions

Learn More About Serial Remote I/O Modules

Serial remote I/O is often the better fit when the installation already uses serial comms, when you need to interface with legacy equipment, or when a simple point-to-point or bus-based connection is more appropriate than adding Ethernet infrastructure. Our range is built around RS-232, RS-422 and RS-485 connectivity, which makes it well suited to those kinds of industrial environments.

That depends on the devices you need to connect and the way the system is laid out. RS-232 is often used for more direct device connections, while RS-485 is commonly chosen in industrial control systems and is widely represented across our range. RS-422 can also be useful where serial communication is needed in a more robust industrial setup.

Isolation is often worth considering in industrial environments where electrical noise, grounding differences or connected field devices could affect reliability. Our range includes isolated digital input and I/O options, which can help support more dependable operation in harsher installations.

Yes. We can help you identify the right serial remote I/O solution based on the interface, signal type and installation requirements involved. Whether you need Modbus RTU I/O, temperature inputs, relay outputs, TTL connectivity or a mixed-signal setup, our team can help you narrow down the right fit.