Features and Benefits of the PLC to PC Digital Bus Interface: High Resolution;Â Avoids multiple conversion errors from analog to digital and back. Simplified Installation;Â Documented interfaces. Multi-drop from same cable. Flexibility;Â Use the appropriate interface and system grouping for optimal system performance and to minimize installed costs. Easier System Validation;Â No need to check multiple current loop interfaces and scale factors. Digital data arrives in pre-assigned data registers exactly as calculated from the signal processor.