Use As Single Device Or As Main Detector, Respectively Secondary Detector; Brightness Measuring - Adjustable Via Knx; Integrated 2-Level Light Control (Switching) - Siemens 5WG1 258-2EB22 Technical Product Information

Each time a presence is detected, the overshoot time is started. Its duration is configurable for each func-
tional block separately. The end of presence is determined by the end of the overshoot time.
The duration of the dead time is also configurable per functional block. It is used to protect the actuators
that are connected to the detector. If a presence is detected during the dead time, neither telegrams are
sent nor the overshoot time is started.
In the following the telegrams, which are send at the beginning of a presence, are called A and B, the
telegrams, which are sent at the end of a presence, are called C and D.
Operating Sequence
After the device has detected a presence, telegram A is sent immediately. If it has been configured to
send also a telegram B, then
telegram B is sent after the
configured time (optionally
also cyclically).
If there are no motions any
more, at the end of the over-
shoot time telegram C and (if
configured) telegram D are
sent. Telegram D can also be
sent cyclically.

Use as single device or as main detector, respectively secondary detector

The detector can be operated as an independent device, as the main or secondary detector.
According to the requirement, additional presence detectors can be connected with the "main detector"
via KNX as "secondary detectors" to extend the presence detection zone. "Secondary detectors" supply
motion information only to the main detector.
Brightness measuring – adjustable via KNX
The device contains an independent light sensor. The signal measured there is available both at the KNX
and internally.
Because the light sensor measures directly,
it must be possible to calibrate it for indirect
measurement, so that it can be adapted to
the different installation sites. Rapid bright-
ness fluctuations are filtered out. The meas-
urement range of the internal light sensor is
between 20 and 1000 lux.
The settings determine whether the bright-
ness value computed by the device or a
brightness value received from outside is
used for the detector's remaining functional
blocks.
For indirect brightness measuring a maximal distance of 2.8 m is recommended. In case of larger dis-
tances the measuring can be realized via a reference area with 2.8 m distance.

Integrated 2-level light control (switching)

If the brightness controller is enabled (automatic mode) the lighting is switched on as soon as the bright-
ness falls below a set lower threshold. The lighting is switched off if the set upper brightness threshold is
exceeded. The brightness thresh-olds are variable either via parameters or via communication objects.
The controller can also be operated semi-automatically by separating into two individual switching ob-
jects for exceeding or falling below the threshold. In this way, it can be switched to "Only on" or "Only
off."
If the controller receives a switching or dimming command via the associated communication object over
KNX, then this is deemed an external override and the controller switches automatic mode off. This
change of status is sent simultaneously on the bus via the "Automatic Status" object.
4 / 12
Update: http://www.siemens.com/gamma-td
January 2015
Motion
Bus telegram A B
UP 258E22, UP 258D12, UP 255D21
ã Siemens AG 2015
Subject to change
dead time
Overshoot time
C D
Building Technologies Division
Control Products and Systems
P.O. Box 10 09 53, D-93009 Regensburg
A
Siemens AG