IP67-rated X67DS438A, suited for use outside control cabinet, and IP20-rated X20DS438A use IO-Link 1.1 to communicate digitally with 4 intelligent field devices. While X20DS438A features 4 IO-Link channels that can be used as standard digital inputs or outputs, all 4 IO-Link channels of X67DS438A can also be operated in SIO mode if desired for use as simple digital inputs or outputs. Additionally, X67DS438A has 4 digital inputs that can be used independently of IO-Link channel configuration.