Operating Instructions

Training Exercises
10
Exercise 4
39
Siemens Industry, Inc. 125-1007 Rev.BA
2014-08-14
The unit will be controlling a fan on an air handling unit. This is a stand-alone drive (no
bypass is installed). A BMS will provide a digital signal for start/stop. A preset flow
setpoint will be entered via the keypad. A flow sensor will be wired to the drive as
feedback for the drive's PID loop.
Key information:
Air Sensor
 Connected to AI2
 4 to 20 mA
 10 to 150 l/s
Operation
 Airflow setpoint is 45 l/s
 Standby once under 9hz for 30 seconds
 Wake level under 35 l/s
Exercise 4
This exercise requires the BT300 Demonstration Panel to be factory- reset and
recommissioned. The standard keypad should be used during this exercise.
Startup Scenario:
The unit will be controlling a fan on an air handling unit. This is an electronic bypass
unit. A BMS will provide a digital signal for start/stop and a 4 to 20 mA signal for speed
reference. A low temperature detector and smoke sensor will be wired as safeties to
the drive.
Key information:
Start/Stop
 Digital Input
Safeties
 Low Temp Detector
 Smoke Sensor
Speed Reference
 4 to 20 mA
Electronic Bypass
View Operation
 Auto (via I/O control)
 Hand (user intervention)
 Off
 Bypass