Siemens 5WG1 258-2EB22 Technical Product Information page 7

à Presence-motion detection in particular:
Normally, the switching pattern is determined by people in the detector's catchment area.
In exceptional cases, however, it can be switched on inadvertently through "outside factors". Accordingly,
potential "sources of interference" should be corrected during planning or before mounting.
Basics:
· The PIR - sensor reacts to temperature differences.
· The lower the temperatures difference between the ambient temperature and the moving object, the
less sensitive the analysis. In other words, moving objects will not then be detected as efficiently and
the catchment area is restricted.
Note:
· There must be an unobstructed line of sight to the person in the catchment area. People behind walls,
etc. (including glass) cannot be detected!
· Obstacles such as party walls, plants or shelves can limit the catchment area.
· Hanging lights cause shadows in the catchment area if they are mounted in the immediate vicinity of
the presence detector.
Interference factors to be avoided:
· Rapid temperature changes in the vicinity of the detector, caused by fan heaters being switched on or
off, fans, etc., simulate motion.
· Lights being switched on or off in the immediate catchment area (mainly incandescent and halogen
lamps) simulate motion.
· Moving objects such as machines, robots, hanging posters, falling flower petals, hot paper from laser
printers, animals, etc.
· The mounting site must not be exposed to vibrations or motion.
Mounting
There are the following options for this:
à UP mounting (A) in an UP socket with screw fixing
à UP mounting (A) with fixing claws in suspended
ceiling
à AP mounting (B) in the AP housing (see accessories)
Connecting the detector:
Connecting:
Plug wires into the bus terminal. Ensure you have stripped the insulation back! Push the bus terminal on
the plug in the device
Disconnecting:
Separate the bus terminal from the device (use a screwdriver if necessary) Separate the wires from the
bus terminal by turning.
Siemens AG
Building Technologies Division
Control Products and Systems
P.O. Box 10 09 53, D-93009 Regensburg
D1 Device
D2 Bus terminal
D2.1 (-) Terminal (grey)
D2.2 (+) Terminal (red)
D2.3 Test contact
D2.4 Bus line wire
UP 258E22, UP 258D12, UP 255D21
ã Siemens AG 2015
Subject to change
Update: http://www.siemens.com/gamma-td
7 / 12
January 2015