Electrical Connection; Power Supply; Wired Connection - Nibe RMU S40 Manuel D'installation

Electrical connection

NOTE
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, sensor cables to external
connections must not be laid close to 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 | GB
CONNECTION TO MAIN PRODUCT
Heat pump/indoor module
The terminal block in RMU S40 (AA4-X1) is connected
to terminal block X30:1-4 on the PCB (AA2) in the heat
pump/indoor module.
If more accessories are to be connected, or are already
installed, the boards are connected in series.
Because there can be different connections for accessor-
ies, 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
19