Nibe SMO 40 Installer Manual page 30

EXTERNAL CONNECTION OPTIONS (AUX)
On the input board (AA3-X6) and terminal block (X2),
SMO 40 has software-controlled AUX inputs and outputs
for connecting the external switch function or sensor.
This means that when an external switch function (the
switch must be potential-free) or sensor is connected
to one of the six special connections, this function for
the connection must be selected in menu 5.4.
soft in/outputs 5.4
For certain functions, accessories may be required.
Selectable inputs
Selectable inputs on the input board for these functions
are:
AUX1
AUX2
AUX3
AUX4
AUX5
AUX6
GND for AUX4-6 is connected to terminal block X2:4.
1 2 3 4
L N 1 1 0 PE 2 3 4
AA3-X6
LEK
Selectable output
A selectable output is AA3-X7.
TIP
Some of the following functions can also be
activated and scheduled via menu settings.
Possible selection for AUX inputs
Temperature sensor
Temperature sensor can be connected to SMO 40. Use
a 2-core cable of at least 0.5 mm² cable area.
Available options are:
30 Chapter 5 | Electrical connections
block heating
activate temp lux
not used
not used
not used
not used
AA3-X6:9-10
AA3-X6:11-12
AA3-X6:13-14
X2:1
X2:2
X2:3
SMO Externt
SMO 40 External
9
B
10
11
A
12
13
14
15
16
AA3-X6
• external supply temperature sensor cooling (EQ1-
BT25) is used when docking 2-pipe cooling. (can be
selected when the air/water heat pump is permitted
to produce cooling)
• cooling/heating (BT74), determines when it is time to
switch between cooling and heating mode (can be
selected when the air/water heat pump is permitted
to produce cooling)
• supply cooling (BT64) is used with active cooling 4-
pipe (can be selected when the air/water heat pump
is permitted to produce cooling)
• Boiler (BT52) (only shown if shunt-controlled additional
heat is selected in menu 5.1.12)
• additional heat (BT63), is used when docking "step-
controlled additional heat before reversing valve for
hot water" in order to measure the temperature after
the additional heat.
Monitor
Available options are:
• alarm from external units. The alarm is connected to
the control, which means that the malfunction is
presented as an information message in the display.
Potential-free signal of type NO or NC.
• stove monitor. (A thermostat that is connected to the
chimney. When the negative pressure is too low and
the thermostat is connected, the fans in ERS (NC) are
closed.
• external level monitor for the condensate water drain
(NO)
External activation of functions
An external switch function can be connected to
SMO 40 to activate various functions. The function is
activated during the time the switch is closed.
Possible functions that can be activated:
• hot water comfort mode "temporary lux"
• hot water comfort mode "economy"
• "external adjustment"
To change the supply temperature and in doing so
change the room temperature, an external switch
function can be connected to SMO 40.
When the switch is closed, the temperature changes
in °C (if the room sensor is connected and activated).
If a room sensor is not connected or not activated,
the desired change of "temperature" (heating curve
offset) is set with the number of steps selected. The
value is adjustable between -10 and +10. External
adjustment of climate systems 2 to 8 requires ac-
cessories.
– climate system 1 to 8
NIBE SMO 40