Electrical Connection - Nibe EME 20 Installateurhandbuch

Electrical connection

CONNECTING COMMUNICATION
NOTE
All electrical connections must be carried out by
an authorised electrician.
Electrical installation and wiring must be carried
out in accordance with the stipulations in force.
The heat pump must not be powered when in-
stalling NIBE EME 20.
• To prevent interference, sensor cables to external connec-
tions 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.
• NIBE EME 20 restarts after a power failure.
CABLE LOCK
Use a suitable tool to release/lock cables in terminal
blocks.
3
1
1
4
1
2
NIBE EME 20 F-series | GB
3
1
2
2
2
2
4
1
3
3
CONNECTING TO INVERTER
RS-485 - COMMUNICATION
Connect the cables to the converter according to the dia-
gram below.
NOTE
The front cover on the inverter must not be
opened. Connection must take place via the inten-
ded communication input under the inverter. Use
the enclosed terminal block supplied with the in-
verter. Note how the cables are connected in the
terminal block!
4 3
5 2
6 1
For identification of the connections start from the slot as
shown in the picture. The rightmost is connection 1 and the
leftmost is connection 6. Make sure that the slot is correct
when fitting into the socket and that the plug goes all the
way into the socket.
PVI 20
Connection Function
1 RS485 (B)
2 RS485 (B)
3 RS485 (A)
4 RS485 (A)
5 Not used
6 Not used
NIBE EME 20 communicates with solar inverters through
RS485 and Modbus RTU. The inverters modbus address
must be set to one of 1-12. If more than one inverter each
has to have a unique address.
NOTE
It can take up to 10 minutes before communication
is established with a solar inverter.
Modbus RTU
Settings for other inverters supporting SunSpec with Mod-
bus RTU.
Baudrate: 9,600
Data bits: 8
Stop bits: 1
PVI 20-XX
Socket
F
31