Operating Instructions

System 600 APOGEE Laboratory Room Controller Owner's Manual
Glossary-2 Siemens Building Technologies, Inc.
control loop
A PID algorithm that is used to control an output based on a set point and an input reading
from a sensor.
Controller Interface
Operator interface software used with the Portable Operator’s Software Terminal for the
purpose of communicating with a Terminal Equipment Controller or a field panel.
CV
Constant Volume.
DDC
Direct Digital Control.
DI
Digital Input. A DI point is a physical output point that accepts a two-state signal (i.e.,
ON/OFF, OPEN/CLOSED, YES/NO, etc.)
DO
Digital Output. A DO point is a physical output point that generates a two-state signal (i.e.,,
ON/OFF, OPEN/CLOSED, YES/NO, etc.)
English units
The foot-pound-second system of units for weights and measurements.
equipment controller
A FLN device that provides additional point capacity to a field panel or provides individual
room or mechanical equipment control.