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3.4.4 Communication Wiring
Instructions for wiring the communications of one or a network of inverters:
1. Open the inverter wiring box. Refer to Section 3.3.1 for instructions
and torque requirements when replacing cover.
2. Bring the communication cables into the wiring box through the
provided knockout holes at the bottom, using similar methods to the
AC and DC wiring. Conduit and knockouts must be sealed and
water-tight to maintain the NEMA 4X rating.
3. Connect the RS485 wires to the P7 connector (network P7 and P9)
ensuring correct polarity and using a shielded twisted pair cable.
4. If the inverter is the last Modbus device in the daisy chain, make
sure the Modbus termination switch S1 is in the ON position
enabling Modbus termination. Do not turn the switch to the ON
position in any other inverters of the daisy chain. If there is only one
inverter, the Modbus termination switch S1 should be set to ON.
5. The shield of the individual cables must be open (not connected to
ground) on one end – the other end of the shield must be grounded.
Failure to follow this installation practice will increase lightning
surge damage to the inverter and will void the warranty. See
application not on website: : https://www.chintpowersystems.com/
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