Best Io Modules Deals Online in the UK (25 Deals Found)

Last Updated - 23/08/2025 Sort By:

Best Choice
frient

New
frient IO Module | Input/Output Module | Smart Home Connectivity Module | Smart Home Interface for Wired Devices | Zigbe
Connect your wired devices to your smart home and start controlling them remotely.

£39.14 £46.95
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Best Value
DollaTek

New
DollaTek 3Pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module
Standard interface that can be expanded in a variety of development boards

£3.99
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New
PCF8575 I2C IO Expansion Module Great for Arduino, Raspberry Pi and More
PCF8575 I2C IO Expansion Module. On board 3.3V level converter circuit, if you don't solder pad of VCC-VDD, the PCF8575

£3.79
EBYTE

New
EBYTE 1-4 DI+DO RS485 Serial Port I/O Module Remote IO MA01-V2 Modbus Industrial Grade Level, Pulse, Follow, Switching C
Support for Modbus RTU protocol; Support for various types of configuration software/PLC/touch screen; RS485 acquisition

£9.29
Used
Autronica BSD-310 I/O Loop Driver Module
Autronica BSD-310 I/O Loop Driver Module. Condition is Used. Dispatched with Royal Mail Tracked 48.

£156.68
somfy

New
Somfy IO Somfy Sensitive Switch 1 Module A/M Black – 1811015

£85.92
EBYTE

New
EBYTE ModBus RTU Serial IO Module RS485 Interface 4DI+2DO 8 Digital Outputs MA01-AXCX4020 Rail Installation 8~28VDC
MA01-AXCX4020 supports the acquisition of 4-channel sensor switch input (DI), which is converted to serial port (RS485)

£10.35
New
Axis A9161 Network I/O Relay Module
Brand new with seals in tact un-opened surplus to requirements from a recent project. The Axis A9161 Network I/O Relay M

£198.28
Geroosaty

New
Geroosaty DC 12V 24V 16 in 16 Out RS485 Remote Switch PLC IO Expansion Board Modbus RTU Multifunctional Convenience Modu
Application: Plc Io Expansion Board, Smart Home, Home Automation, Smart Home; Ptc Camera, Security Monitoring, Identific

£16.26
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Used
Turck IO module TBEN-S2-4IOL
Its glass-fibre reinforced housing ensures EMI resistance, and an integrated Ethernet switch streamlines operations. It

£151.48
22% Off
Youmile

New
Youmile 5 pcs PCF8574 IO Expansion Board PCF8574 I/O Expander I2C Evaluation Develop Module with DuPont Cable for Arduin
【Remote expansion】: The PCF8574 IO Expansion Board provides general-purpose remote I/O expansion via the two-wire bidire

£6.89 £8.89
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WINGONEER

New
WINGONEER PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module
Standard interface that can be expanded in a variety of development boards

£3.99
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New
IO Expansion Module PCF8575 I2C Great for Arduino Raspberry Pi and More
MPN: PCF8575. Interface Type: I2C. Expands the functionality of boards like the Arduino UNO R3. Type: Interface IC. I²C

£3.99
DollaTek

New
DollaTek 5Pcs PCF8574 IO Expansion Board I/O Expander I2C-Bus Evaluation Development Module
Standard interface that can be expanded in a variety of development boards

£6.99
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Used
Tridium IO-34 Module | 34 IO Points | BMS IO | Used | JACE 6 Compatible
Ideal for smaller BMS expansions or test rigs. 8 Analog outputs (0-10VDC).

£19.34
CRGANGZY

New
CRGANGZY PCF8575 I2C IO Extension Shield Module I2C To 16IO IIC I2C I/O Extension Shield Module Fit for
Increased I/O Capacity: By leveraging the PCF8575 chip, the IO expander module amplifies the number of available I/O pin

£1.99
New
I2C IO Expander module with 16 I/O Arduino, Raspberry, ESP8266, ESP32
I2C Communication : Efficiently expands your I/O without using many GPIO pins.

£4.45
New
Raspberry Pi Compute Module 5 IO Board SC1751
Raspberry Pi SC1751 Compute Module 5 IO Board. TheRaspberry Pi SC1751 Compute Module 5 IO Board enables connection of a

£21.12
New
PCF8575 I2C IO Extension Shield Module 16 I/O Port Expander For Arduino
Have you run out of I/O pins?. Onboard 3.3V level converter circuit, if you do not solder VCC-VDD pad, the PCF8575 level

£1.42
New
B&R X67PS1300 Power Supply Module – X67 I/O System, IP67 Industrial Automation
New B&R X67PS1300 power supply module for the X67 I/O system series. This rugged, IP67-rated unit is designed for decent

£198.28
New
MCP23017 I O Expansion Board Module SG-IO-E017, 16 I O Pins Supports for Raspber
MCP23017 I O Expansion Board Module SG-IO-E017, 16 I O Pins Supports for Raspberry Pi Series, Onboard 3-Digit DIP Switch

£10.73
New
1PCS X PCF8575 I2C IO Extension Shield Module 16 I/O Port Expander For Arduino
Have you run out of I/O pins?. Onboard 3.3V level converter circuit, if you do not solder VCC-VDD pad, the PCF8575 level

£1.43
New
Yanhua Mini ACDP-2 Programming Master Basic Module Wireless For PC/Android/IOS
Yanhua Mini ACDP 2 K-ey Progarmming ACDP-2 Master Basic Module Supports USB and Wireless Connection No Need Soldering. A

£369.00
Used
Crestron ST-IO In/Out Module-UNTESTED-

£22.00
New
Trend IQ4/IO/8AO Expansion Module - NEW IN BOX
Trend IQ4/IO/8AO module brand new in the box not used.

£260.67

25 Io Modules deals are available from: Amazon, eBay stores, starting from £1.42.
The biggest discount we found is 22% on Youmile 5 pcs PCF8574 IO Expansion Board PCF8574 I/O Expander I2C Evaluation Develop Module with DuPont Cable for Arduino & Raspberry Pi at Amazon.
The lowest price we found is £1.42 while the highest is £369.00.
Prices for the best Io Modules deals average at £64.30.
Last updated on August 23, 2025.
We scanned these quality online stores and more to deliver you with the best offers online available for Io Modules.