Siemens Building Technologies QAA20 Series Data Sheet
Room Temperature Sensors
QAA20 Series
Analog Display, Setpoint and Override.
Description
The QAA20 Series Room Temperature Sensors monitor
and transmit changes in temperature to the building
control systems. QAA20 Series sensors utilize the
standard Series 1000 housing, but with a totally new
internal circuit design.
Features
• 0-10V or 4-20mA output signals
• High degree of accuracy
• Analog temperature display
• Liquid Crystal Display (LCD)
• Analog setpoint adjustment
• Occupancy override button
QAA2072.FWNU
Room Temperature Sensor with
QAA20xx.WU
Room Temperature Sensor.
Applications
The QAA20 Series Room Temperature Sensors are
especially suited for applications where precise, stable
temperature sensing is required. An assortment of models
is available – versions with sensing only or setpoint
adjustment, occupancy override and display.
The QAA20 Series temperature sensors are also available
in a variety of signal types. Choose from powered 4 to
20 mA or 0 to 10 Volt signal versions. Select the correct
product based on the compatibility needs of your building
automation system.
E-9
Sensors
www.usa.siemens.com/hvac
QAA20 Series Specifications
E-10
General
Installation ................................ 18 AWG Cable Length Shared in Conduit
with Other Sensor Wiring 750 ft. (229 m) max.
Connections ................................................................... Screw Terminals
Voltage Requirement ................................................... 13.5 to 35 Vdc and
24 Vac (for Sensors with 0-10 Vdc outputs)
Housing
Material Type ........................................................Polycarbonate Plastic
Color ............................................................................................. White
Dimensions.......................................... 3-11/32" H x 2-1/2" W x 1-1/2" D
(85 mm H x 63 mm W x 38 mm D)
Temperature Element
Measurement Range .............................................. Controller Dependent
Operating Temperature ................................. -40 to 240°F (-40 to 116°C)
Operating Range, Active Signal Types ................................... 40 to 90°F
Temperature Effect ....................................Less than 0.1% per Degree C
Sensing Element................................................Various,See Table Below
Output Signals .............................................. 4 to 20 mA and 0 to 10 Vdc,
0-100% Linear, Proportional
Polarity Protection...............................................................................Yes
Accuracy at Calibration Temperature ...........................................+/- 1 K
QAA20 Series Product Ordering
Description Part No.
4 to 20 mA Sensors
40 to 90°F, Siemens Logo QAA2072.WU
40 to 90°F, Setpoint, Night Override, Display, No Logo QAA2072.FWNU
40 to 90°F, Setpoint, Night Override, Display, Siemens Logo QAA2072.FWU
0 to 10 Volt Sensors
40 to 90°F, Siemens Logo QAA2062.WU
40 to 90°F, Setpoint, Night Override, Display, Siemens Logo QAA2062.FWU
Sensors
Accessories & Service Kits
E-51
www.usa.siemens.com/hvac
Loading...