Data Sheet for Product

ManualsBrandsSiemens ManualsSensors Air qualityDuct air quality sensor CO2/ temperature / rel. Humidity / VOC QPM11..., QPM21…, w/o 4...20 mA output

CE1N1961en

2018-05-01

Building Technologies

961

QPA10… / QPA20…

QPA20…D

Room air quality sensors

QPA10

QPA20..

· Maintenance-free CO

sensing element (depending on type) based on optical

infrared absorption measurement (NDIR

)

· Or with VOC

sensing element based on a heated tin dioxide semiconductor

· CO

temperature (active or passive) and CO

humidity-temperature multisensor

· No recalibrations required

· Operating voltage AC 24 V or DC 15…35 V

· Signal outputs DC 0...10 V or DC 0...5 V or 4...20 mA adjustable

· Selectable passive temperature sensing element

1) NDIR = Non dispersive infrared

2) VOC = volatile organic compounds (also called mixed gas)

Use

In ventilation and air conditioning plants to enhance room comfort and optimize energy

consumption by providing demand-controlled ventilation. The sensor acquires:

· CO

concentrations as an indication of occupancy in rooms where smoking is

prohibited.

· VOC concentrations as an indication of odors such as tobacco smoke, body odor, or

material fumes in the room.

· Relative humidity in the room.

· Room temperature.

Sensors QPA10… and QPA20… can be used as a:

· Control sensor.

· Transmitter for building automation and control systems and / or display units

(QPA20…D only).

1961P01

1961P02

Summary of content (10 pages)

PAGE 1
961P01 1961P02 1 QPA10… / QPA20… 961 QPA20…D Room air quality sensors QPA10.. QPA20.. · Maintenance-free CO2 sensing element (depending on type) based on optical infrared absorption measurement (NDIR 1)) · Or with VOC 2) sensing element based on a heated tin dioxide semiconductor · CO2 temperature (active or passive) and CO2 humidity-temperature multisensor · No recalibrations required · Operating voltage AC 24 V or DC 15…35 V · Signal outputs DC 0...10 V or DC 0...5 V or 4...
PAGE 2
Typical use: · Acquisition of CO2 and VOC concentrations: In party rooms, lounges, fair pavilions and exhibition halls, restaurants, canteens, shopping malls, athletic centers, sales rooms, and conference rooms. · Acquisition of CO2 concentrations: In rooms with varying occupancy levels where smoking is prohibited, e.g. museums, theaters, movie theaters, auditoriums, office spaces, and school rooms. QPA20… sensors may not be deployed as safety devices, e.g.
PAGE 3
Diagram VOC (Output X1) SymaroTM air quality sensors determine the mixed gas concentration (VOC) using metal-oxide semiconductor sensing elements. The sensors measure precisely at all times and with no maintenance and recalibration required thanks to an integrated compensation mechanism, saving service costs. The sensor provides a DC 0...10 V or DC 0...5 V or 4...20 mA output signal proportionate to the VOC content of the ambient air. 1961D03_01 VOC concentration (QPA1000) X1 [mA] [V] 20 10 16.8 8 13.
PAGE 4
Temperature active (QPA206…) The sensor acquires the room temperature with a sensing element whose electrical resistance changes as a function of the temperature. The change is converted to an active DC 0...10 V or DC 0...5 V or 4...20 mA output signal ( 0...50 °C or - 35...+35 °C). Temperature passive (QPA2080…) The sensor measures the room temperature using a sensing element where electrical resistance changes with the temperature of the ambient air.
PAGE 5
Characteristic curve: DJ [K] R [W] 1.00 0.80 0.60 0.40 0.20 0.00 -0.20 -0.40 -0.60 -0.80 -1.00 1745D07 100000 10000 1000 -10 Key R J DJ J 0 10 20 30 40 50 60 [°C] 1745D06 NTC 10k Accuracy: -10 0 10 20 30 40 50 60 J [°C] Resistance in Ohm Temperature in Celsius Temperature differential in Kelvin Mechanical design The units are designed for wall mounting and can be deployed with most types of commercially available recessed conduit boxes.
PAGE 6
– …for output for all QPA… Jumper in the mid position (R2) O1 O2 = O3 0...50 °C (factory setting) = 4...20 mA = DC 0…10 V = DC 0…5 V … for the active test function Jumper for the measuring range in the vertical position: The signal output delivers the values according to table "Test function active".
PAGE 7
Cable routing and cable selection When laying the cables, remember that electrical interference is greater the longer the cables run parallel and the smaller the distance between them. On applications with EMC problems, use shielded cables. For secondary power lines and signal lines, use twisted-pair cables. Mounting notes Mounting location Inner wall of the room to be ventilated, not in niches, not behind curtains, not above or near heat sources, and not exposed to direct light from spot lights.
PAGE 8
Technical data Operating voltage AC 24 V ± 20 % oder DC15…35 V (SELV) or AC/DC 24 V class 2 (US) Frequency Power consumption 50 / 60 Hz at AC 24 V Fuse slow max. 10 A or Circuit breaker max. 13 A Characteristic B, C, D according to or Power source with current limitation of max. 10 A At "U" output signal "I" output signal QPA1000 QPA2000, QPA 2080, QPA2080D, QPA2060, QPA2060D Max. <1.6 VA Max. <0.9 VA Max. <3.5 VA Max. <3.2 VA QPA2002, QPA2002D QPA2062, QPA2062D Max. <1.8 VA Max. <0.9 VA Max. <3.
PAGE 9
Degree of protection Protection degree of housing IP30 according to EN 60529 Protection class III according to EN 60730-1 Electrical connections Screw terminals for 1 ´ 2.5 mm or 2 ´ 1.5 mm Environmental conditions Operation to Climatic conditions Temperature (housing incl. electronics) Humidity Mechanical conditions IEC 60721-3-3 Class 3K3 0 ...50 °C 0…95 % r.h. (non-condensing) class 3M2 Transport to Climatic conditions Temperature Humidity Mechanical conditions IEC 60721-3-2 Class 2K3 - 25...
PAGE 10
QPA2062, QPA2062D QPA2080, QPA2080D AC 24 V SELV / DC 15...35 V G0 G G0 X1 X2 X3 B, M G R1 = -35...+35 °C R2 = 0...50 °C CO2 G0 O1 = 4...20 mA O2 = DC 0...10 V O3 = DC 0...5 V 4...20 mA DC 0...10 V DC 0...5 V 4...20 mA DC 0...10 V DC 0...5 V AC 24 V SELV / DC 15...35 V G G G CO2 G0 G0 O1 = 4...20 mA O2 = DC 0...10 V O3 = DC 0...5 V System potential AC 24 V (SELV) or DC 15...35 V System neutral and measuring neutral Signal output DC 0...10 V or DC 0...5 V or 4...20 mA Signal output DC 0...