Installation
27
RJ45 Connector Cabling
REFUsol 100K
982059/02
2020-11
En
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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
