Siemens BACnet Owner's Manual page 26

Glossary
26
Siemens Industry, Inc.
Building Technologies
UI
Universal Input. Can be used as an AI or DI. An AI input is a point receiving a signal
that represents a condition that has more than two states. A DI input is a physical input
point that receives a two-state signal.
unbundle
Term used to describe the entering of a point that resides in a controller's database
into the field panel's database so that it can be monitored and controlled from the field
panel.
VAV
Variable air volume. Ventilation system that changes the amount of air supplied to and
exhausted from the rooms served.
Owner's Manual 125-5093
2015-10-14