User Manual
CM1N5485E / 10.1998 Siemens Building Technologies
2/6 Landis & Staefa Division
A potential-free contact is used for HVAC functions. The control output is independent of
the intensity of daylight.
If a person enters the unit's detection zone, the contact will close after a certain switch
on delay time has elapsed (adjustable from 0 to 300 seconds), which activates the
respective HVAC unit. If the person leaves the detection zone, the contact will open
after a certain switch off delay time (adjustable from 0.5 to 30 minutes) and the
controlled unit will be deactivated.
When ordering, please give name and type reference of the presence detector.
The unit consists of an upper and a lower housing section.
Both sections are attached together and secured by a clamp. The electrical connections
are established via pins.
The upper housing section contains the actual detector. It consists of a white plastic
casing which accommodates a pyramid-shaped plastic insert with the integral Fresnel
lenses and an insert with the pyroelectric sensors, microelectronics, setting
potentiometers, securing clamps and pins.
The lower section houses the power part. It is designed for fitting into a recessed
conduit box (single conduit box of 58 mm dia.).
90
180
300
30
0
[ s ]
10
20
30
5
½
[ min ]
QPA83.2
931124 A
5485Z01
21
1 Setting potentiometer for switch on delay
(control output Q23/Q24); typical setting: 90s
2 Setting potentiometer for switch off delay
(control output Q23/Q24); typical setting: 10 min
To ensure environmentally compatible disposal, the larger plastic components are
labeled with a material description as per ISO/DIS 11 469.
For the correct detection of persons, the detector's location is of utmost importance.
It should be chosen such that most movements of the people in the space will be within
the detection zone. This is a mandatory requirement when controlling lighting systems.
Depending on the application, it may be necessary to use the QPA83.2 or QPA83.1
(180° surveillance, refer to data sheet 5484). Both units can also be combined, if
desired.
Control output
Ordering
Mechanical design
Setting elements
Disposal
Engineering notes