Sungrow SG125HV, User Manual

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User Manual 6 Electrical Connection
59
The connection of second PE terminal is optional. Whether to connect
the terminal is determined according to local standards or regulations,
but connection is recommended.
Cable Connection
Fig. 6-7 Second PE connection
* Connection parts are not within
the scope of delivery
* For torque
specifications, refer to 11.2 Tightening Torques.
6.5 RS485 Communication Connection
6.5.1 Communication Overview
There are two communication waterproof connection terminals on the bottom
of the inverter. RS485 A/B terminals and RS485 interface are provided on the
configuration circuit board of the junction box. A 120
Ω
terminating resistor can
be connected between the A and B communication cable through the dip
switch.
Item Name Description
A Screw
M6 × 12mm
B Lock washer -
C Washer -
D Cable socket -
E Grounding
cable*
-
*the cross-sectional area of the
grounding cable should not be less than
half of the PE cable of the AC cable.