User Manual

GAMMA instabus
Technical product information
August 2020
Shutter / blind actuator (RL module) RL 521/23 5WG1521-4AB23
AC 230V, 2 x 6A, with detection of end positions
Siemens Switzerland Ltd RS-AG
Building Technologies Division
International Headquarters
Theilerstrasse 1a © Siemens AG 2020 Update: http://www.siemens.com/gamma
CH-6300 Zug Subject to changes
1
Product and functional description
The RL 521/23 shutter / blind actuator is a KNX device with
two relay output channels. The device is installed in an
AP 118 Control Module Box or an AP 641 room control
box. The bus is connected via a bus terminal block. The
actuator electronics are supplied via the bus voltage.
The RL 521/23 may be used to control blinds, shutters,
awnings, windows, or doors.
The device is designed to drive (per channel) one AC 230V
drive (motor) with electromechanical limit switches or
with integrated electronics for disconnection at the limit
positions.
For drives with electromechanical limit switches the actu-
ator can be configured to detect the status of the electro-
mechanical limit switches such that the travel time be-
tween the end positions can be measured via a synchroni-
zation run. The travel time of the blind / shutter is auto-
matically measured from the upper end position to the
lower end position and vice versa. The measurement is
only reliable for drives with electromechanical limit
switches. The travel time cannot be automatically ad-
justed for drives with integrated electronics for disconnec-
tion at the limit positions. These drives have to be con-
trolled via a time limit. Their travel times have to be man-
ually measured as precisely as possible and configured in
the application program.
Parallel operation of several drives on one channel re-
quires the intermediate switching of a special separation
relay. If such a separation relay is connected to the output
to drive several drives in parallel, then the travel time has
to be configured manually.
If the device is configured for automatic detection of the
travel time, then parallel operation of several drives with
electromechanical limit switches or mixed operation with
drives with integrated electronics for disconnection at the
limit positions is not permitted.
Detection of final positions, Automatic detection of
travel times
The device can detect if the blind / shutter is in the upper
or lower end position. This detection depends on the solar
protection drive (motor) itself and on the wiring and spe-
cifically cannot be guaranteed for drives with integrated
electronics for disconnection at the limit positions. Hence,
the detection can be disabled by a parameter. If automatic
detection of end positions is enabled, the travel time is set
to the maximum value after a download of the configura-
tion. If the end positions were detected successfully and
the solar protection moved without interruption from the
lower position to the upper position, then the parameter
value for the travel time is updated and saved. The same
applies to the travel time from the upper to the lower end
position.
When the end position is detected, then the parameter
value for the travel time extension is set to 10% of the
travel time. In principal, the travel time, i.e. the time the
relay contacts are closed, is determined based on the con-
figured value or the parameter value updated based on
the travel times measured between end positions
After a download of the application program respectively
of addresses and parameters the solar protection must be
synchronized. This is triggered when a telegram “solar
protection up/down” or “central up/down” is received. The
solar protection then performs a synchronization run. First
it briefly moves down, then fully into the upper end posi-
tion. Then it moves from the upper end position to the
lower end position measuring the associated travel time.
Finally, it moves from the lower end position to the upper
end position measuring the associated travel time. After
this procedure the solar protection is synchronized and re-
mains in the upper end position until a motion is triggered
by another telegram.
If the actuator does not detect the upper end position at
the start of the synchronization run, then the measure-
ment travels are not executed. In that case, the actuator is
not synchronized. The synchronization run has to be initi-
ated again as described above.
Any additional telegram “solar protection up/down” or
“central up/down” received during the synchronization
run is ignored. If a telegram “slats open/close” is received
this is interpreted as stop and the solar protection is
stopped without finalizing the synchronization of the