Rj45 Connectors; Rs485 Daisy Chain - JFY tech JSI-1100TL Installation And Operator's Manual

Fig. 11 The waterproof RJ45 socket and connectors for RS485 port
To help installation, the inverter features two RJ45 sockets to separate input
ethernet cable from output ethernet cable.

5.2.2 RJ45 Connectors

The RS485 serial connection, whether single unit or several inverters as daisy
chain, can be performed by means of the RJ45 connectors (See Fig.11).
It makes no difference if its sockets is no.1 or no.2 since they are connected in
parallel, and signals are thus the same. One socket is for input ethernet cable with
RJ45 connector, another socket is for output ethernet cable with RJ45 connector.
The output ethernet cable reaches the following unit.
RS485 pin definition is as follows:
NOTE: You can buy T-568B standard Straight-Through ethernet cable to connect
two adjacent inverters in local market. Of course, you can do it by yourself and
remember the ethernet cable is Straight-Through.

5.2.3 RS485 Daisy Chain

RJ45 connectors may be used to connect a single JSI inverter or multiple JSI inverters
daisy chained together. Up to 31 inverters can be daisy chained. Recommended
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RJ45 connectors
Pin Signal
# Name
1 RTN
2
3
4
5
6
7 -TR
8 +TR
19
Description
Signal Return
Common reference for logical signals.
Not Used
Not Used
Not Used
Not Used
Not Used
- Data Line
Required for RS485 communication.
+ Data Line
Required for RS485 communication.