Operating Instructions

Siemens Building Technologies, Inc. Glossary-1
Glossary
Overview
Tthe glossary contains terms and acronyms that are used in this manual. For definitions of
point database descriptors, refer to
Chapter 6 - Point Database
in this manual. For definitions
of commonly used terms, as well as acronyms and abbreviations associated with APOGEE,
refer to the
Technical Glossary of Building Controls Terminology and Acronyms (125-2185)
.
This book is available from your local Siemens Building Technologies, Inc. representative.
AI
Analog Input. A physical point that accepts a continuous variable signal.
AO
Analog Output. A physical point that generates a continuous variable signal.
centralized control system
Any building control system.
CFM
Cubic Feet per Minute.
constant volume
Volume of air flowing through the fume hood does not vary.
COV
Change Of Value. A minimum change required to trigger an update of the displayed value.
DI
Digital Input. A physical point that accepts a two-state signal (such as, ON/OFF,
OPEN/CLOSED, or YES/NO).