Leadshine provides EtherCAT IO couplers with IO modules consist of digital, analogue, temperature, encoder modules and much more at 3 different series for different requirements. R3 series IO modules which is our most complete and advanced ultra thin IO modules can be matched with any 3rd party controllers offering the most space saving options in our IO modules product lines. R2 series IO modules are designed to be high performaning modules with expansion up to 32 modules. R1 series IO modules can expand up to 16 modules for digital and analogue IO modules which is our most economical option in this product line.