User Manual 6 Electrical Connection
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6.5.3 RS485 Communication Connection
RS485A/B Bus Connection
Step 1
Lead Network cable through communication cable gland to the configuration circuit
board.
Step 2
Strip off the insulation layer of the communication cable. Connect the A, B, and GND
of RS485 communication cable to corresponding terminals according to the marks on
the configuration circuit board.
Step 3
According to the position of the inverter (refer to the prior section), repeat step 1…2
to connect the other RS485 cables.
Step 4
Pull cables outwards to confirm whether they are fastened firmly.
Step 5
According to the position of the inverter (refer to the prior section), switch ON or OFF
the terminating resistor.
Step 6
Tighten the tread-lock sealing lock. Block off the vacant terminals to protect the dust
and moisture penetrating inside the inverter.
Step 7
Seal the gaps between the cable and the gland inside the lower part of the cabinet by
fireproofing mud. If there is no other connection procedure, reassemble and fix the
front cover of the connection cabinet.
Step 8
Connect the communication devices. Refer to other manuals and documents if there
are other devices.
Step 9
Confirm the communication connection and set the communication parameters.
If more than one inverter is connected to PC or Logger, please set the
communication parameters from the LCD display. For more information,
please refer to 10.12 Communication Parameter Setting.
SolarInfo logger and RS485-232 converter are optional parts and can be
ordered from Sungrow.
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