The DeltaV™ Controller Interface for PROVOX™ I/O can be used with both Control I/O and Distributed (MUX) I/O, which connects using the serial buffer card. The interface to PROVOX I/O uses an SQ or SX controller and a DeltaV power supply installed on the PROVOX I/O Carrier. With this solution, PROVOX I/O support is integrated into standard DeltaV engineering and diagnostics, including DeltaV Explorer and Control Studio.