I/O Systems

I/O Systems and Expansion Modules

I/O systems extend a controller with the digital and analogue inputs and outputs a machine actually needs – thermocouple and RTD inputs, relay and transistor outputs, high-speed counters and fieldbus-coupled remote I/O. We stock expansion modules and remote I/O for ABB AC500, Unitronics, Wago, IMO and Lovato platforms.

Match the module to your controller family using the brand filter, then check channel count and signal type. The controllers themselves are under PLC and HMI & PLC combinations; network couplers and gateways are under Remote & Network.

Showing 1,030 products

Product Key Specs Price Qty Stock Actions
ABB tb5620-eth v3 base 2 x slot Why Choose the TB5620-2ETH?
ABB tb5620-eth v3 base 2 x slot Why Choose the TB5620-2ETH?
£171.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP112300R0278
1SAP187100R0205 ABB TA5128-2AI1AOW AC500,analog in/out mod. option board, 2AI U, 1AO U/I, 10Bit, Spring terminals, Wide temperature ABB TA5128-2AI1AOW analogue I/O option board providing 2 voltage analogue inputs and 1 voltage/current analogue…
1SAP187100R0205 ABB TA5128-2AI1AOW AC500,analog in/out mod. option board, 2AI U, 1AO U/I, 10Bit, Spring terminals, Wide temperature ABB TA5128-2AI1AOW analogue I/O option board providing 2 voltage analogue inputs and 1 voltage/current analogue…
£92.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP187100R0205
ABB tu517:s500,bus-klemm.block,sch Why Choose the ABB TU517?
ABB tu517:s500,bus-klemm.block,sch Why Choose the ABB TU517?
£56.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP211400R0001
ABB dc562:s500,digital i/o.mod.16dc:24vdc/0.5a,1-wire Why Choose the ABB DC562?
£151.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP231900R0000
ABB ai523:s500,analog in.mod.16ai,u/i/rtd Why Choose the ABB AI523?
£502.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP250300R0001
ABB ai581-s safety analog input module Why Choose the ABB AI581-S?
ABB ai581-s safety analog input module Why Choose the ABB AI581-S?
£459.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP282000R0001
ABB TU542-H-XC:S500, Terminal Unit, Spring,  for high current modules, Hot Swap
£109.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1SAP415200R0001
ABB ai563:s500,analog in.mod.4ai,thermocoupl Why Choose the ABB AI563?
£223.00 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 1TNE968902R1103
Wago 750-1415 8Di, 24 Vdc 3ms 2-Wire WAGO 750-1415 16-channel digital input module designed for the WAGO I/O SYSTEM 750 modular automation…
Wago 750-1415 8Di, 24 Vdc 3ms 2-Wire WAGO 750-1415 16-channel digital input module designed for the WAGO I/O SYSTEM 750 modular automation…
£69.16 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 750-1415
Wago 750-1607 Potential Distribution, 824V/80V WAGO 750-1607 potential distribution module providing eight 24 V DC and eight 0 V distribution…
Wago 750-1607 Potential Distribution, 824V/80V WAGO 750-1607 potential distribution module providing eight 24 V DC and eight 0 V distribution…
  • 24 V
  • IP20
£34.60 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 750-1607
Wago 750-344 FC Interbus, 500Kbit/S Eco WAGO 750-344 INTERBUS ECO fieldbus coupler for connecting WAGO I/O System 750/753 modules to INTERBUS…
Wago 750-344 FC Interbus, 500Kbit/S Eco WAGO 750-344 INTERBUS ECO fieldbus coupler for connecting WAGO I/O System 750/753 modules to INTERBUS…
  • 24 V
  • IP20
£228.74 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 750-344
Wago 750-414 4Di, 5 Vdc 0.2ms WAGO 750-414 4-channel digital input module for the WAGO I/O System 750 supporting 24 V…
Wago 750-414 4Di, 5 Vdc 0.2ms WAGO 750-414 4-channel digital input module for the WAGO I/O System 750 supporting 24 V…
  • IP20
£53.51 ex. VAT
Manufacturer Lead Time Contact us for availability
SKU: 750-414
LED Controls specialist
● 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 despatches
3500+ Customers supported
28 Trusted Manufacturers

● latest blog

Factory Automation
Insights

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...