REFU REFUsol 100K - RJ45 Connector Cabling

Installation 27
RJ45 Connector Cabling
REFUsol 100K
982059/02
2020-11
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∘ You can connect up to 25 inverters for RS485, and up
to 25 inverters for each Ethernet daisy-chain line.
∘ For the RS485 bus, you have to terminate the last in-
verter in the chain with the RJ45 termination adapt-
er (120 Ω).
∘ If you want to use both bus systems in parallel, you
have you use the Ethernet/RS485 splitter on the first
inverter.
4.12 RJ45 Connector Cabling
Fig. 27: Pin assignment on RJ45 plug
NOTICE
▸ Only connect the communication cable to the assigned
two RJ45 ports with labels “RS485/LAN 1” and “RS485/
LAN 2”. The RJ45 port with label “Digital Input” carries
24 VDC. Connecting any communication cable to this
port can damage the inverters and connected equip-
ment.
▸ For RS485 masters (data-loggers, park controllers etc.),
only connect the four RS485 signals to this equipment.
▸ It is recommended to protect communication lines with
external surge protection devices against overvoltage
caused by lightning.
Tab. 5: Pin assignment
Pin 1 2 3 4 5 6 7 8
Ethernet
TX+ TX- RX+ RX-
RS485
Data+ Data- Ref+ Ref-
1 2 3 4 5 6 7 8
1 2 3 4 5 6 7 8