Morning, is there a remote i/o available for a UR3 CB3? We need to add more inputs / outputs to a project and have been told by our supplier none are available.
Thanks.
Hello
The easiest I/O extension is a modbus I/O node, it’s easy to setup and easy to control from the UI.
ProfiNET is also possible but can be a bit more complicated as you might need to program the nodes.
We use both, modbus if we only need a few extra I/O with no logic itself. ProfiNET if we have a PLC that control something beside the robot.
Check the Universal Robots Plus marketplace. There’re multiple MODBUS solutions listed there. 
MOXA E12XX is a MODBUS solution with expandable IO.
There is a video on how to set it up with Universal Robots robots, as well: https://www.youtube.com/watch?v=iWy7FxcfNd4&t=1s