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Electrical connection
CAUTION!
All electrical connections must be carried out by
an authorised electrician.
Electrical installation and wiring must be carried
out in accordance with national provisions.
The main product must be disconnected from the
power supply when installing RMU S40.
•
To prevent interference, communication cables to external
connections must not be laid in the vicinity of high voltage
cables.
•
The minimum area of communication and sensor cables
to external connections must be 0.5 mm² up to 50 m, for
example EKKX, LiYY or equivalent.
•
RMU S40 restarts after a power failure.
You can connect max 32 wireless units and 8 wired RMU S40
to the main product. If you connect more than three wired
units to the main product (of which max. two RMU S40),
these require an external power supply.
POWER SUPPLY
RMU S40 is not battery powered. For the power supply, you
can use a USB mains adapter (5 V) and connect it to "Supply
voltage, Micro-USB" (X5).
Max. cable length for USB connection: 3 metres.
WIRED CONNECTION
You can connect your RMU S40 to your main product to
provide power and communication.
NIBE RMU S40 | EN
CONNECTION TO MAIN PRODUCT
Heat pump/indoor module
RMU S40 contains a terminal block (AA4-X1) that connects
directly to the main product's base board (terminal block
AA2-X30).
If several accessories are to be connected, or are already
installed, the boards are connected in series.
Because there can be different connections for accessories,
you should always read the instructions in the manual for
the accessory that is to be installed.
Heat pump, indoor module
Värmepump, inomhusmodul
AA2-X30
1
2
3
4
RMU S40
RMU S40
AA4-X1
RMU S40
RMU S40
AA4-X1
RMU S40
RMU S40
AA4-X1
AA4-X5
USB
USB
4
GND
3
B
2
A
1
+12V
4
GND
3
B
2
A
1
+12V
4
GND
3
B
2
A
1
+12V
21
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