Get more inputs/outputs

if your needs require more inputs/outputs than you currently have, we recommend considering https //edingcnc com/product category/controllers/ otherwise, we offer our https //edingcnc com/product/rly8 io/ which adds 8 relay outputs and 8 opto coupled inputs the rly8 device is compatible with controllers that support modbus , such as the cnc7xx and the icnc600