Electrical Connection
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It is important to daisy chain the inverter RS485 connections to minimize noise
and bus reflections. All RS485 connections must be terminated in a serial fashion
and not to exceed 32 in total. Daisy Chain vs. multiple branch configuration is
recommended.
WARNING!
Make sure all DC and AC power has been disconnected before
opening the wire box and ensure that hazardous high voltage
and power has been discharged to avoid risk of electric shock.
Wait at least 5 minutes before opening the wire box.
The detailed steps to perform the daisy chain connection are as follows:
1.
Open the wire box.
2.
Insert the communication cables into the wire box through the
knockout holes at the bottom.
3.
Connect the RS485 wires to the green Phoenix connector.
4.
If the inverter is the
last
Modbus device in the daisy chain, make sure
the Modbus termination switch S201 is in the ON position to enable
Modbus termination; while all other switches shall be in the OFF
position.
5.
Connect the shield or drain wire continuously, but not in contact with
RS (Common) or Enclosure Ground. Single-point ground the
shield/drain wire.
6.
Do not connect RS485 Common to ground.
After completing all the wiring steps, reinstall the front cover and press down to
lock it. Finally, fasten the four screws on the front cover as shown in the figure.
Tools required: 5mm socket head screw wrench, torque:2.94N.m, 26lbf-in.
Figure 4-14 Re-cover the upper cover
IMPORTANT!
It is important to use hand tools (e.g. socket wrench) instead of
power drivers or other types of screw drivers.
During installation, it is recommended the cover is in alignment
with balanced force to avoid thread damage.
Partially engage the screws into the threaded inserts before
tightening.
