Data Sheet for Product

QPA20xx Series Indoor Air Quality Room Sensors Technical Instructions
Document Number CE1N1961
July 26, 2019
Siemens Industry, Inc. Page 5
Output Signal Selection
• O1 = 4 to 20 mA
• O2 = 0 to 10V
• O3 = 0 to 5V
Active Test Function
Jumper for the measuring range in the vertical position:
The signal output delivers the values according to the Test function active table (see
Figure 3).
Temperature Display
Changeover
Meaning of the different jumper positions:
Temperature display:
− Jumper in the horizontal, lower position = °C (factory setting).
− Jumper plug in the horizontal, upper position = °F.
Troubleshooting
QPA2000
• In the event of CO
2
failure, 10 Vdc, 5 Vdc, or 20 mA will be present at signal output
X1 (after 60 seconds).
QPA2002/QPA2002D
• In the event of CO
2
or VOC failure, 10 Vdc, 5 Vdc, or 20 mA will be present at signal
output X2 (after 60 seconds).
QPA2060/QPA2060D
• If the temperature sensor becomes faulty, 0 Vdc or 0 mA will be present at signal
output X2.
QPA2062/QPA2062D
• If the temperature sensor becomes faulty, 0 Vdc or 0 mA will be present at signal
output X3, and the humidity signal at signal output X2 will increase to 10 Vdc, 5 Vdc,
or 20 mA (after 60 seconds).
• If the humidity sensor becomes faulty, 10 Vdc, 5 Vdc, or 20 mA will be present at
signal output X2 (after 60 seconds), and the temperature signal will remain active.
Measured Value Display
With sensors type QPA2002D, QPA2060D and QPA2062D, the measured values can
be read on an LCD. The following measured values are displayed:
• CO
2
: In ppm.
• CO
2
+ VOC: As a bar chart (4 bars X2 = 2V, 1V, or 7.2 mA
20 bars X2 = 10V). More bars = higher VOC
• Temperature: In °C or °F.
• Humidity: In percent.
Disposal
The device is considered electrical and electronic equipment for disposal in terms of the
applicable European Directive and may not be disposed of as domestic garbage.
• Dispose of the device through channels provided for this purpose.
• Comply with all local and currently applicable l aws and regulations.
Engineering Notes
• The sensor must be powered by a transformer for safety extra low-voltage (SELV)
with separate windings, suited for 100% duty. It must be sized and fused in
compliance with local safety regulations.
• When sizing the transformer, the power consumption of the sensor must be taken
into consideration. For information about wiring, see the Technical Instructions of the
devices with which the sensor is used.
• Observe maximum permissible cable lengths.