MERLIN NX ROOM CONTROLLER – INSTALLATION & COMMISSIONING INSTRUCTIONS
Energy optimization per EN15232 or special behavior of the
light can be achieved via the application input. The
application engineer can create customer-specific
applications to, e.g., switch the light OFF if the daylight level
reaches a configurable level.
The application engineer can program scenes for light, blinds,
Application commands may be used by the supervisory
station or the primary plant controller to, e.g., switch OFF all
lights during the night.
NOTE: The application engineer has the option of blocking
application commands for a configurable time after
the light has been manually set.
Manual Address Command Bit Input
This input is used if the light is controlled by a manual
command coming from another light function block. This
functionality is used for grouping, e.g., using one pushbutton
to switch ON/OFF all lights in a room.
Motion and/or Brightness Sensor
This input is used to connect a motion detector including a
The input can be configured for:
Light ON if occupancy detected on dark.
Light ON and AutoOffTimer restarted if occupancy
detected and the room is dark.
Light OFF if the room is unoccupied or the room is bright.
Do not switch the light OFF if the automatic OFF timer has
expired and occupancy is detected.
Do not switch the light OFF if the application wants to
switch the light OFF but the room is still occupied.
The light function block has an emergency input which has
the highest priority. Application commands and manual
commands are blocked in case of an emergency command.
The emergency input is used, e.g., in case of fire to switch
ON all lights permanently or it can be used to switch OFF
certain light groups in case the building is running in
Feedback Information from the Light Function Block
The light provides a feedback for the light level. In addition, it
provides a cause for the actual light level. This information is
of considerable assistance to the application engineer in
clearly understanding the cause for the light level (e.g., light
switched ON due to emergency or for lamp test).
The light function block can be configured to command other
light function blocks. This is used for grouping of lights.
Light type, e.g. ON/OFF, dimming, staircase, etc.
Assignment of switching outputs (relay or triac). It is
recommended to use coupling relays if triac outputs are
used for lighting. Please observe the relays' constant
current and inrush current limitations. Coupling relays may
be used if the internal relays cannot support the required
Assignment of analog outputs for light dimming via
NOTE: Only AO3 and AO4 of the RL8N support dimming.
Assignment of inputs for pushbutton connection and one
or two pushbutton control.
Min/max level and speed for dimming.
Auto OFF time delay.
Optional switch OFF delay time in case of automatic OFF.
The light blinks to inform the room occupant that the light
will be switched OFF. The room occupant may manually
switch ON the light in this case to avoid automatic
switching OFF of the light.
The RL8N is the preferred hardware model for light and blinds
control. Special features of the RL8N:
Dimming of lights via 1...10V output requires that the
analog output can operate as a current sink (-/+ 1mA on
AO3 and AO4).
High inrush current (80A inrush current and 10 A
continuous current on relay 1 and 4) for capacitive loads
like LED lighting
Increased reliability for dry inputs (24V pull-up voltage for
Wiring Example for Lights and Blinds
Fig. 20. Wiring example for lights and blinds (RL8N)