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2019 WEINZIERL ENGINEERING GmbH
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4. Operating parameters of the dimmer chan-
nels
Maximum connectable power
The maximum dimmable power of the dimming actuator is es-
sentially limited by the power loss in the device. The maximum
current of 6 A can be distributed to any of the four channels.
With identical loads, 1.5 A per channel is thus permitted.
In Tunable White (TW) mode, two channels are used for each
function. In the standard setting, the total current of the two
channels is 100% of the maximum current of one channel. Thus
TW LEDs with double current can be connected here. Example:
-
Channel 1: TW A cold white 3 A
-
Channel 2: TW A warm white 3 A
-
Channel 3: TW B cold white 3 A
-
Channel 4: TW B warm white 3 A
PWM Phase position
The PWM signals of output channels 1 and 4 are in phase.
Channels 2 and 3 are also in phase, but shifted by 180° to 1 and
4.
Power dissipation
The dimming of luminaires is not possible without a certain
power loss in the dimmer. This power dissipation leads to a heat-
ing of the device and depends on several factors. In addition to
the output of the connected lamps, the current dimming value is
also taken into account. Thus, the loss with the luminaire
switched off is almost zero except for the leakage current. Even
at 100%, the power loss is relatively low and can be traced back
to the contact resistance of the output.
Between 0 and 100% the switching losses caused by the PWM
are added. Overall, there is a maximum power loss in the upper
dimming range.
The rated power of 144W refers to the maximum permitted ambi-
ent temperature for free installation. If there are other devices
next to the dimming actuator that emit heat, the power that can
be connected is reduced. Alternatively, the devices can also be
mounted at a small distance (approx. ½ TE = 9 mm). Suitable
spacers for the top-hat rail are available on the market for this
purpose.
Safety shutdown
The dimming actuator has an electronic fuse for overcurrent and
overtemperature. In both error cases, the output is switched off
and can be switched on again via a command if the error is no
longer present.
In addition, the device is also equipped with fuses against over-
current and overtemperature. This fuse stage protects connected
devices and surrounding materials against severe damage, but
leads to failure of the dimming actuator and can no longer be re-
set.
5. ETS database
The ETS database (for ETS 4.2 ETS and 5) can be downloaded
from the product website of the KNX IO 534 (4D) (www.wein-
zierl.de) or via the KNX online catalogue.
ETS parameter dialog
The following pages and parameters are visible in the ETS:
A.
Description
This page shows the device description and the associated wir-
ing scheme.
B.
General settings
Device name (30 Characters)
An arbitrary name can be assigned for the KNX IO 534 (4D). The
device name should be meaningful, e.g. „Living Room“. This
helps the clarity of the ETS project.
Send delay after bus power return
A send delay of telegrams after the return of the bus voltage can
be set via this parameter. In this case, telegrams from the device
are sent to the KNX bus in a delayed manner by the set time.
This results in a reduction of the bus load at a bus power return.
Other functions such as receiving telegrams of switching opera-
tions of the actuator are not affected by this parameter.
Prog. mode on device front
In addition to the normal programming button
❸
the device al-
lows activating the programming mode on the device front with-
out opening the switchboard cover. The programming mode can
be activated and deactivated via pressing simultaneously both
buttons
❼
and
❽
.
