Rs485 Cable Connection - Growatt 1500-US Installation & Operation Manual

7.4 RS485 cable connection

1.Installation rubber pipe into the knock-out hole and pull the pipe nut slightly, feed
the RS485 cables through the pipe into the wire box.
.
2 RS485 communication wiring request and machining.
Code Name
A Conductor cross-section
B Stripping insulation
3.Take out the RS485 connection terminal from accessory packing bag.
4.Connect the cable to the RS485 terminal ('1' to 'T/R-', '3' to 'T/R+', and '2' to the
shielding net)
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Detail
0.2~0.5mm2
5~8mm
As to the connection between inverters, please refer to the
following figure.
Information
As to the connection between inverter and data logger, please
refer to the following figure.
Information
RS485 BUS balance jumper:
In RS485 communication circuit, when the T/R+ and T/R- lines
reach a certain length, the line itself has impedance, in order to
balance the impedance of the RS485 bus line, you'd better get
the jumper to the state "ON" in RS485 BUS balance jumper of the
remote inverter that the last one connects to the RS485 bus line
Information
while others keep "OFF" state.
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