Product and Application Description
The RS 525/23 Universal Dimmer is a KNX device with one dimmer
output. 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 RS 525/23 can switch and dim resistive loads (e.g. incandescent
lamps, high voltage halogen lamps), capacitive loads (e.g.
low voltage halogen lamps with intermediate electronic transformers),
or inductive loads (e.g. low voltage halogen lamps
with intermediate conventional transformers).
Protection against over-load / short-circuit
After about 5 seconds in an over-load condition the universal
dimmer turns itself off permanently. At the earliest 2 minutes
after an over-load or short-circuit tripping the dimmer may be
turned on again. First send an “off” or a “dimming value =0”
command to turn the device off and then turn it on again by
sending an “on” or a “dimming value > 0” command.
In a short-circuit condition the dimmer turns the load off for 3
seconds and automatically tries to switch the output on to the
currently set dimming value once within 1 minute. If the shortcircuit
condition still persists the output is turned off permanently.
Turn the output on again by following the instructions for a permanently
turned off output in an over-load condition.
Protection against over-temperature
In case the maximum permissible temperature is exceeded the
dimmer dims down to the minimal dimming value. If after 2
minutes the dimmer has cooled down sufficiently, it automatically
dims back to the currently set dimming value. If after 2
minutes the maximum permissible over-temperature is still exceeded,
the output is turned off permanently.
Turn the output on again by following the instructions for a permanently
turned off output in an over-load condition.
Immunity to ripple control signals and electrical grid frequency
fluctuations
In the ex-factory settings the influence of ripple control signals
is compensated to reduce flickering of the lamp. This measure
increases the influence of electrical grid frequency fluctuations
on the brightness of the lamp.
A mostly undisturbed operation for an electrical system without
a synchronous connection to the electrical grid can be achieved
when the ripple control compensation is disabled via the associated
parameter. The dimmer becomes less sensible to frequency
fluctuations in the electrical system. Yet, ripple control signals
will lead to an increased flickering of the load.
Behavior at bus voltage failure / recovery
On bus voltage failure the current switching status and dimming
values are saved for restoration on bus voltage recovery.
On bus voltage recovery the configured actions are executed
and, if applicable, new status values are reported.
Building site function
The building site function provided ex-factory enables switching
the building site lighting on and off via bus wall switches and
actuators, even if these devices have not yet been commissioned
with ETS.
Behavior on unloading the application program
When the application program is unloaded with ETS the device
does not function.
Resetting the device to ex-factory settings
When the programming button is pressed for more than 20 seconds
the device is reset to the ex-factory settings. All configuration
settings are lost. The building site function is re-activated.
The device is configured and commissioned with the ETS (Engineering
Tool Software) version ETS3 v3.0f or later.